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1.
Acta odontol. latinoam ; 32(2): 88-96, Aug. 2019. ilus, tab
Article in English | LILACS | ID: biblio-1038164

ABSTRACT

The aim of this study was to determine the differences in arch length, inter-canine distance, inter-premolar distance, intermolar distance and arch shape between dental discrepancies (crowding and spacing) in a sample of dental casts from the Afro-Colombian population of San Basilio de Palenque. An analytical, cross-sectional study was conducted on a convenience sample of 63 subjects aged 11 to 57years, of Afro-Colombian origin, with full dentition from first molar to first molar, without extensive caries or restorations, and excluding casts with defects due to loss. The differences between arch (upper and lower) variables were analyzed according to dental discrepancies. Plaster models digitalized with a TR1OS3 Mono scanner with exactitude (6.9 ± 0.9 pm) and precision (4.5 ± 0.9 pm) were analyzed with Orthonalyzer software. Statistical analyses were done on SPSS software (Version 20 for Windows) and Real Statistics. Spacing discrepancy of68.25% was found for upper arch and 66.66% for lower arch; crowding discrepancy of 19.04% for upper arch and 20.63% for lower arch, and an adequate ratio of 12.69% for both arches. No statistically significant difference (p>0.05) was found between arch parameters except for inter-premolar distance on the lower arch. The most frequent arch shape in the population was oval for both upper arch, with 76.19%, and lower arch, with 71.42%. Tooth size was larger in males than females but the difference was not statistically significant.


El objetivo de este estudio fue determinar las diferencias en longitud de arco, distancia intercanina, interpremolar, intermolar y la forma de arco entre discrepancias dentales (apiñamiento y espaciamiento), en una muestra de modelos dentales de la población afrocolombiana de San Basilio de Palenque. Se realizó un estudio analítico transversal, en una muestra por conveniencia de 63 sujetos con un rango de edad entre 11 y 57 años, de origen afrocolombiano, quienes tuvieron dentición completa de primer molar a primer molar, sin caries extensas, ni restauraciones; se excluyeron los modelos con defectos por el vaciado. Se analizaron las diferencias entre las variables de los maxilares (superior e inferior) con las discrepancias dentales. Se utilizaron modelos de yeso que fueron digitalizados con el escánerTR1OS3 Mono con una exactitud de (6.9 ± 0.9 pm) y una precisión de (4.5 ± 0.9 pm)y analizados con el software Orthonalyzer. Los análisis estadísticos se llevaron a cabo utilizando el software SPSS (Versión 20 para Windows) y Real Statistics. Se encontró una discrepancia de espaciamiento de un 68,25% para el arco superior y 66,66% en el arco inferior; y una discrepancia de apiñamiento en el arco superior de 19,04% e inferior de 20,63% y una relación adecuada de 12,69% para los dos arcos. No se encontraron diferencias estadísticamente significativas (p>0.05) en los parámetros de arco a excepción de la distancia interpremolar del arco inferior. La forma de arco más frecuente en la población fue ovalada tanto en el arco superior con un 76,19% como en el arco inferior con un 71,42%. En cuanto al tamaño dental, se presentó mayor tamaño en los hombres que en las mujeres, pero este no fue estadísticamente significativo.


Subject(s)
Adolescent , Adult , Child , Female , Humans , Male , Middle Aged , Young Adult , Tooth Crown/pathology , Dental Arch/pathology , Malocclusion/etiology , Organ Size , Cephalometry/statistics & numerical data , Cross-Sectional Studies , Colombia/epidemiology , Crowns , Models, Dental , Diastema/etiology , Malocclusion/pathology , Malocclusion/epidemiology , Maxilla/pathology , Odontometry/statistics & numerical data
2.
J. appl. oral sci ; 27: e20180434, 2019. tab, graf
Article in English | LILACS, BBO | ID: biblio-1012505

ABSTRACT

Abstract This study aimed to compare the linear dimensions of the dental arches of adult patients with complete unilateral cleft lip and palate (UCLP) after orthodontic and prosthetic treatment with fixed partial dentures (FPD) to patients without clefts, using 3D technology. This retrospective longitudinal study sample consisted of 35 subjects divided into two groups. Included in this sample were 15 complete UCLP individuals who had received orthodontic treatment before rehabilitation with a fixed partial denture (FG), as well as 20 patients without cleft as control group (CG). All patients were aged between 18 and 30 years. Digital dental casts were obtained in two stages: (T1) end of orthodontic treatment and (T2) one year after prosthetic rehabilitation (FG); and (T1) end of orthodontic treatment and (T2) one year after removal of the orthodontic appliance (CG). Intercanine, interfirst premolar and intermolar distances, and incisor-molar length were obtained. A precalibrated and trained examiner performed the assessments. Intergroup differences between T2 and T1 were compared between the groups using the t test or Mann-Whitney test with a significance level of 5% (p<0.05). The intercanine distance variation (T2-T1) showed statistical difference (p=0.005) increasing in the FG group and decreasing in the CG group. In the interfirst premolar distance variation, FG decreased, while CG increased with statistically significant difference (p=0.008). The intercanine distance of individuals with cleft showed stability, while that of the CG had no stability. The CG showed stability in the interfirst premolar distance, while FG had no stability. These findings showed that the FPD is capable of restricting orthodontic results, leading to a stabilization of the dental arches.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Young Adult , Orthodontics, Corrective/methods , Cleft Lip/rehabilitation , Cleft Palate/rehabilitation , Dental Prosthesis, Implant-Supported/methods , Imaging, Three-Dimensional/methods , Dental Arch/pathology , Orthodontic Appliances , Reference Values , Retrospective Studies , Cleft Lip/pathology , Cleft Palate/pathology , Treatment Outcome , Statistics, Nonparametric , Anatomic Landmarks , Maxilla/pathology
3.
Dental press j. orthod. (Impr.) ; 23(2): 75-86, Mar.-Apr. 2018. tab, graf
Article in English | LILACS | ID: biblio-953020

ABSTRACT

ABSTRACT The purpose of this paper was to emphasize the importance of the orthodontic setup in treatment planning for skeletal Class III malocclusion correction in an adult patient with moderate lower anterior crowding and anterior crossbite associated with two supernumerary lower incisors.


RESUMO O objetivo desse artigo é enfatizar a importância do setup ortodôntico no planejamento do tratamento da má oclusão de Classe III esquelética de uma paciente adulta com apinhamento anteroinferior moderado e mordida cruzada anterior associada à presença de dois incisivos inferiores supranumerários.


Subject(s)
Humans , Female , Young Adult , Orthodontics, Corrective/methods , Patient Care Planning , Malocclusion, Angle Class III/surgery , Malocclusion, Angle Class III/therapy , Orthodontic Wires , Orthodontics, Corrective/instrumentation , Tooth Extraction , Tooth Movement Techniques/instrumentation , Image Processing, Computer-Assisted/methods , Radiography, Dental , Cephalometry/methods , Treatment Outcome , Orthodontic Brackets , Orthodontic Appliance Design , Photography, Dental , Dental Arch/surgery , Dental Arch/pathology , Esthetics, Dental , Incisor/pathology , Malocclusion/therapy , Malocclusion/diagnostic imaging , Malocclusion, Angle Class III/diagnostic imaging
4.
Dental press j. orthod. (Impr.) ; 23(2): 30-36, Mar.-Apr. 2018. graf
Article in English | LILACS | ID: biblio-953017

ABSTRACT

ABSTRACT The teeth become very close to each other when they are crowded, but their structures remain individualized and, in this situation, the role of the epithelial rests of Malassez is fundamental to release the EGF. The concept of tensegrity is fundamental to understand the responses of tissues submitted to forces in body movements, including teeth and their stability in this process. The factors of tooth position stability in the arch - or dental tensegrity - should be considered when one plans and perform an orthodontic treatment. The direct causes of the mandibular anterior crowding are decisive to decide about the correct retainer indication: Should they be applied and indicated throughout life? Should they really be permanently used for lifetime? These aspects of the mandibular anterior crowding and their implication at the orthodontic practice will be discussed here to induct reflections and insights for new researches, as well as advances in knowledge and technology on this subject.


RESUMO Os dentes ficam muito próximos quando estão apinhados, mas suas estruturas permanecem individualizadas e, nessa situação, o papel dos restos epiteliais de Malassez é fundamental para liberar o EGF. A tensigridade é um conceito chave para compreender as respostas dos tecidos submetidos às forças nos movimentos corporais, incluindo os dentes e sua estabilidade nesse processo. Os fatores da estabilidade de posição de um dente na arcada dentária — ou tensigridade dentária — devem ser considerados quando se planeja e finaliza um caso na prática clínica ortodôntica. As causas diretas do apinhamento dentário anteroinferior são determinantes para se refletir se a contenção deve ser mesmo indicada e aplicada por toda a vida e se, necessariamente, deve ser usada de forma permanente. Esses aspectos do apinhamento dentário anteroinferior e suas implicações na prática clínica serão aqui abordados para induzir reflexões e insights de novas pesquisas, bem como avanços no conhecimento e tecnologia sobre esse assunto.


Subject(s)
Humans , Incisor/pathology , Malocclusion/etiology , Malocclusion/pathology , Mandible/pathology , Tooth/pathology , Tooth Eruption , Tooth Movement Techniques , Alveolar Bone Loss , Orthodontic Retainers , Dental Arch/anatomy & histology , Dental Arch/pathology , Incisor/anatomy & histology , Mandible/anatomy & histology
5.
Bauru; s.n; 2018. 62 p. ilus, tab.
Thesis in English | LILACS, BBO | ID: biblio-905295

ABSTRACT

This study aimed to present two papers that show the alterations in the dental arch dimensions of children with cleft lip and palate before and after the primary surgeries. The first study aimed to evaluate the dimensional alterations of the dental arches of neonates with unilateral complete cleft lip and palate before and after two different primary plastic surgeries. The sample was composed of 114 dental casts of 57 children, divided into two groups: Group 1 ­ 26 neonates whose lip closure was accomplished at 3 months of life by Millard´s technique and the anterior and posterior palate closure by von Langenback's technique (VL); Group 2 ­ 31 neonates whose lip closure, nose's ala correction, and anterior palate closure were accomplished of life by Millard´s technique, Mcomb's or Skoog's technique, and vomer's flap, respectively at 3 months of life; posterior palate closure was accomplished by VL at 12 months of life. The dental casts were analyzed at two phases: (T1) pre-cheiloplasty and (T2) one year after palatoplasty. The second study aimed to evaluate morphometrically and longitudinally the alterations of the dental arch dimensions of children with cleft lip and palate. The sample was composed by digital dental casts of children with complete cleft lip (Group 1), complete cleft lip and palate (Group 2), and complete cleft palate (Group 3), obtained at pre-cheiloplasty (T1), pre-palatoplasty (T2), and one year after palatoplasty (T3). The measurements of the dental arch dimensions of both studies were performed directly on the digitized models and analyzed by Appliance Designer software. The following dimensions were obtained: intercanine distance, inter-tuberosity distance, anterior arch length, and total arch length. A previously trained and calibrated examiner performed the assessments of both studies. To verify the alterations among groups, t test and ANOVA followed by Tukey was applied. In the first study, no statistically significant differences occurred at pre-cheiloplasty. At one year after palatoplasty, Group 1 had statistically significant greater anterior-posterior arch length (P=0.002) than Group 2. This suggested that the outcomes of the different surgical techniques may cause alterations in the dental arch growth and development of neonates with cleft lip and palate. In the second study, in Group 1, the distances C-C', T-T', and I-TT' were statistically greater at T2 than at T1. In Group 2, the distances C-C' and I-CC' were smaller at T3. T-T' distance decreased and I-TT' distance increased at all phases. In Group 3, the C-C', T-T', and I-TT' distances were statistically greater at T3. The intergroup comparisons showed that C-C' and T-T' distances were statistically greater in Group 1; C-C' and I-CC' distances were statistically smaller in Group 2; and I-TT' distance was statistically greater in Group 3. The longitudinal evaluation of the changes occurred in the dental arches of children with different oral cleft types showed that cheiloplasty and palatoplasty caused the most alterations in the growth and development of the maxillary dimensions of children with complete cleft lip and palate.(AU)


O propósito deste estudo foi apresentar dois artigos que mostram as alterações das dimensões dos arcos dentários de crianças com fissura labiopalatina antes e depois das cirurgias primárias. O primeiro estudo foi proposto para avaliar as alterações dimensionais dos arcos dentários de neonatos com fissura labiopalatina antes e após a realização de duas técnicas distintas de cirurgias plásticas primárias. A amostra foi composta de 114 modelos dentários em gesso de 57 crianças, divididos em dois grupos: Grupo I ­ 26 neonatos, fechamento do lábio realizado aos 3 meses de vida pela técnica de Millard e palato total aos 12 meses, pela técnica de von Langenback (VL); Grupo II ­ 31 neonatos, fechamento do lábio pela técnica de Millard aos 3 meses de vida, correção de asa nasal (técnicas de Mcomb ou Skoog) e palatoplastia anterior com retalho de vômer aos 3 meses. A palatoplastia posterior foi realizada aos 12 meses pela técnica VL. Os modelos foram analisados em 2 fases: (F1) pré-queiloplastia e (F2) 1 ano pós-palatoplastia. No segundo estudo o objetivo foi realizar uma avaliação longitudinal das alterações das dimensões dos arcos dentários de crianças com fissura labiopalatina. A amostra foi composta de modelos digitais de crianças com fissura completa de lábio (Grupo 1), completa de lábio e palato (Grupo 2), e completa de palato (Grupo 3), obtidos nas fases de pré-queiloplastia (Fase 1), pré-palatoplastia (Fase 2), 1 ano póspalatoplastia (Fase 3). As medidas das dimensões dos arcos dentários nos dois estudos foram realizadas nos modelos digitalizados e analisados utilizando software Appliance Designer. As seguintes dimensões foram obtidas: distância intercaninos, distância intertuberosidade, comprimento anterior do arco dentário e comprimento total do arco. Um avaliador previamente calibrado e treinado realizou as avaliações para os dois estudos. Foi aplicado o Teste t e a Análise de Variância, seguida do Teste de Tukey. Para o primeiro estudo não houve diferença estatisticamente significante na fase pré-queiloplastia entre os grupos. Na fase 1 ano pós-palatoplastia houve diferença para o comprimento anteroposterior do arco dentário (p=0,002), entre os grupos, com valores maiores para o grupo I. Para o segundo estudo, no Grupo 1, as distâncias C-C', T-T' e I-TT' apresentaram diferença estatisticamente significante entre a F1 e F2, com aumento na F2. Para o Grupo 2, houve diferença estatisticamente significante em todas as fases avaliadas. As distâncias C-C' e I-CC' apresentaram menor valor na F3, T-T' diminuiu em todas as fases, e I-TT' aumentou em todas as fases. No Grupo 3, as distâncias C-C', T-T' e I-TT' mostraram diferença estatisticamente significante com aumento na F3. Quando avaliadas as medidas entre os grupos e fases, C-C' e T-T' mostraram um valor maior para o Grupo 1. A comparação entre F2 e F3 mostraram para as distâncias C-C' e I-CC' valor menor para o Grupo 2, e I-TT' foi maior para o Grupo 3. As avaliações longitudinais nos arcos dentários mostraram que a queiloplastia e palatoplastia causam maiores alterações de crescimento e desenvolvimento maxilares de pacientes com fissura completa de lábio e palato.(AU)


Subject(s)
Humans , Animals , Male , Infant , Child, Preschool , Cleft Lip/pathology , Cleft Palate/pathology , Dental Arch/pathology , Anatomic Landmarks , Cleft Lip/surgery , Cleft Palate/surgery , Models, Dental , Imaging, Three-Dimensional , Longitudinal Studies , Reference Values , Sex Factors
6.
Int. j. odontostomatol. (Print) ; 11(3): 327-332, set. 2017. tab
Article in English | LILACS | ID: biblio-893269

ABSTRACT

ABSTRACT: This paper main objective is to estimate the level of association between lower anterior crowding and the presence of lower third molars on study models and panoramic dental radiographs of patients treated by the Orthodontics Postgraduate Students at the Dentistry Faculty at the University of Cartagena (Cartagena de Indias, Colombia) and also other dental and radiographs care centers in Cartagena de Indias. It was made using a cross-sectional study at the Dentistry Faculty at the University of Cartagena and others dental care centers in the city. There were 366 study models and panoramic dental radiographs selected by strict inclusion/exclusion criteria for patients. An instrument that includes age, gender, presence or absence of third molars, position of third molars according to Winter's classification, stage of formation of the third molars according to Nolla's classification, and crowding magnitude according to Harfin's classification was used. Data were analyzed based on frequency distributions and proportions; inferential analysis was performed through proportional odds model using the software package IBM SPSS Statistics v23. It was found that the patients with Nolla 6 from the right side are more likely to have mild-moderate crowding magnitude than patients with Nolla 10 on that same side. In conclusion, this research provides as main result the implication of the eruption of the lower third molars and particularly those erupting in mesioangular and horizontal positions in the anterior crowding (AA).


RESUMEN: El objetivo de este trabajo fue estimar el nivel de asociación entre el apiñamiento dentario anteroinferior y la presencia de terceros molares inferiores en modelos de estudio y radiografías panorámicas de los pacientes atendidos por estudiantes del posgrado de ortodoncia de laFacultad de Odontología de Cartagena de Indias, Colombia y también otros centros dentales y de radiografías en Cartagena de Indias. Se realizó un estudio transversal en la Facultad de Odontología de la Universidad de Cartagena y otros centros de atención odontológica de la ciudad. Se utilizaron 366 modelos de estudio y radiografías dentales panorámicas seleccionadas por estrictos criterios de inclusión / exclusión para los pacientes. Se utilizó un instrumento que incluía edad, sexo, presencia o ausencia de terceros molares, posición de los terceros molares de acuerdo con la clasificación de Winter, etapa de formación de los terceros molares de acuerdo con la clasificación de Nolla y magnitud de apiñamiento según la clasificación de Harfin. Los datos se analizaron en base a las distribuciones y proporciones de frecuencia; el análisis inferencial se realizó a través del modelo de probabilidades proporcional utilizando el software IBM SPSS Statistics v23. Se encontró que los pacientes con Nolla 6 en el lado derecho son más propensos a tener una magnitud de apiñamiento de leve a moderada en comparación a los pacientes con Nolla 10 en ese mismo lado. En conclusión, esta investigación proporciona como resultado principal la implicación de la erupción de los terceros molares inferiores y particularmente aquellos que erupcionan en posiciones mesioangulares y horizontales en el apiñamiento dentario anterior (AA).


Subject(s)
Humans , Tooth Eruption , Tooth, Impacted/complications , Incisor/pathology , Malocclusion/etiology , Molar, Third/pathology , Tooth, Impacted/pathology , Tooth, Impacted/epidemiology , Radiography, Panoramic , Incidence , Cross-Sectional Studies , Colombia/epidemiology , Dental Arch/pathology , Malocclusion/pathology , Malocclusion/epidemiology
7.
Dental press j. orthod. (Impr.) ; 22(3): 97-108, May-June 2017. tab, graf
Article in English | LILACS | ID: biblio-891072

ABSTRACT

ABSTRACT Introduction: Etiology of dental crowding may be related to arch constriction in diverse dimensions, and an appropriate manipulation of arch perimeter by intervening in basal bone discrepancies cases, may be a key for crowding relief, especially when incisors movement is limited due to underlying pathology, periodontal issues or restrictions related to soft tissue profile. Objectives: This case report illustrates a 24-year old woman, with maxillary transverse deficiency, upper and lower arches crowding, Class II, division 1, subdivision right relationship, previous upper incisors traumatic episode and straight profile. A non-surgical and non-extraction treatment approach was feasible due to the miniscrew-assisted rapid palatal expansion technique (MARPE). Methods: The MARPE appliance consisted of a conventional Hyrax expander supported by four orthodontic miniscrews. A slow expansion protocol was adopted, with an overall of 40 days of activation and a 3-month retention period. Intrusive traction miniscrew-anchored mechanics were used for correcting the Class II subdivision relationship, managing lower arch perimeter and midline deviation before including the upper central incisors. Results: Post-treatment records show an intermolar width increase of 5 mm, bilateral Class I molar and canine relationships, upper and lower crowding resolution, coincident dental midlines and proper intercuspation. Conclusions: The MARPE is an effective treatment approach for managing arch-perimeter deficiencies related to maxillary transverse discrepancies in adult patients.


RESUMO Introdução: a etiologia do apinhamento dentário pode estar relacionada à constrição das arcadas dentárias em diversas dimensões, e a manipulação apropriada do perímetro da arcada, por meio da intervenção em casos de discrepâncias de base óssea, pode ser o fator chave para a dissolução do apinhamento, especialmente em casos onde a movimentação de incisivos é limitada em decorrência de problemas periodontais ou restrições relacionadas ao perfil facial. Objetivos: o presente relato de caso ilustra uma paciente de 24 anos de idade, com deficiência transversa de maxila, apinhamento das arcadas superior e inferior, má oclusão de Classe II, 1a divisão, subdivisão direita, incisivos superiores previamente traumatizados e perfil reto. A abordagem de tratamento não-cirúrgica e sem extrações foi viável devido à técnica de expansão rápida da maxila assistida por mini-implantes (MARPE, do inglês miniscrew-assisted rapid palatal expansion). Métodos: o dispositivo MARPE foi confeccionado a partir de um expansor Hyrax convencional apoiado em quatro mini-implantes. Foi adotado o protocolo de expansão lenta, com um período total de ativações de 40 dias e 3 meses de contenção. Uma mecânica de tração intrusiva apoiada em mini-implantes foi utilizada para a correção da relação de Classe II subdivisão direita, adequação do perímetro da arcada inferior e correção do desvio da linha média antes da inclusão dos incisivos centrais superiores. Resultados: os registros pós-tratamento demonstraram o aumento de 5,0 mm na distância intermolares, relação bilateral de Classe I de molares e caninos, resolução do apinhamento superior e inferior, linhas médias dentárias coincidentes e intercuspidação adequada. Conclusões: a técnica MARPE é uma abordagem de tratamento efetiva para a resolução da deficiência de perímetro das arcadas dentárias relacionada à discrepância maxilar transversa em pacientes adultos.


Subject(s)
Humans , Female , Young Adult , Bone Screws , Palatal Expansion Technique/instrumentation , Dental Arch/pathology , Malocclusion, Angle Class II/therapy , Biomechanical Phenomena , Radiography, Panoramic , Cephalometry , Orthodontic Appliance Design , Dental Arch/diagnostic imaging , Malocclusion, Angle Class II/diagnostic imaging
8.
Bauru; s.n; 2017. 103 p. ilus, tab.
Thesis in English | LILACS, BBO | ID: biblio-884366

ABSTRACT

Purpose: The aim of this study was to evaluate the occlusal and arch form stability of self-ligating Damon System appliance treatment, after a mean period of 3 years. Methods: The sample consisted of 20 patients (10 female and 10 male) Class I malocclusion with mild to moderate crowding treated orthodontically without extractions, with a mean initial age of 14.66 years (SD +1.40), mean final age of 17.70 years (SD +1.39) and mean age at posttreatment of 20.62 years (SD +1.42). The mean treatment time was 3.03 years (S.D. +1.17) and the mean posttreatment time was 2.92 years (S.D +0.88). Initial, final and posttreatment dental casts and panoramic radiographs of each patient were evaluated. Crowding, transverse and anteroposterior arch dimensions were measured in digital models in the maxillary and mandibular dental arches. For evaluation of the occlusal stability of orthodontic treatment it was used the Objective Grading System (OGS) in dental casts and panoramic radiographs. Intragroup comparison of all variables evaluated was performed by ANOVA and Tukey test, when necessary. For OGS comparison the dependent T test were used. Intragroup comparison of all variables evaluated was performed by ANOVA and Tukey test, when necessary. For OGS comparison the dependent T test used. Results: During treatment, there was significant decrease in the Little's Irregularity Index in maxillary and mandibular arches. No statistically significant changes in the Little's Irregularity Index were found during the follow-up period after debonding in a mean period of 2.9 years. There was significant increase in all measurements of the maxillary arch width and arch length with treatment. The mandibular measurements of arch width and arch length also showed a significant increase during treatment. At posttreatment, all maxillary and mandibular measurements remained stable, with no significant relapse of arch changes. The OGS index did not show significant changes during the posttreatment period. Conclusions: Treatment with self-ligating Damon System appliances showed increase in maxillary and mandibular arch widths and lenghts, which remain stable after a mean period of 3 years posttreatment. Treatment with this system provides maxillary and mandibular incisor alignment, as defined by Little's Irregularity index, and occlusal stability, as defined by the OGS score, with stability after a mean period of 3 years posttreatment.(AU)


Objetivo: O objetivo deste estudo foi avaliar a estabilidade oclusal e a estabilidade da forma do arco em pacientes tratados com aparelho autoligável do Sistema Damon. Material e métodos: A amostra foi constituída por radiografias panorâmicas e modelos de gesso iniciais (T1), finais (T2) e pós-tratamento (T3) de 20 pacientes (10 homens e 10 mulheres) com má oclusão de Classe I, apinhamento moderado a severo, tratados ortodonticamente sem extrações. Os pacientes apresentaram idade inicial média de 14,66 anos (D.P= +1,40), idade final média de 17,70 anos (D.P= +1,39), tempo médio de tratamento 3,03 anos (D.P= +1,17), idade de pós-tratamento média de 20,62 anos (D.P= +1,42) e tempo médio de pós tratamento de 2,92 anos (D.P= +0,88). O Índice de Estabilidade Oclusal (OGS), foi avaliado por meio de modelos de gesso e radiografias panorâmicas. As medidas transversais, sagitais e o Índice de irregularidade de Little foram realizadas utilizando-se modelos de gesso que foram digitalizados com o scanner 3Shape R700 3D (3Shape A/S, Copenhagen, Dinamarca) e mensurados através do Software OrthoAnalyzerTM 3D (3Shape A / S, Copenhagen, Dinamarca). Para comparação intragrupo de todas as variáveis avaliadas entre as fases inicial (T1), final (T2) e controle (T3), ANOVA e teste de Tukey foram utilizados. Para avalição do OGS foi utilizado o teste t dependente. Resultados: No arco superior todas as medidas da forma e comprimento do arco apresentaram um aumento com o tratamento (T2-T1), com exceção do Índice de Irregularidade de Little que diminuiu significantemente com o tratamento. As medidas mandibulares da forma e comprimento do arco também tiveram um aumento significante com o tratamento, já o Índice de Irregularidade de Little diminuiu significantemente. No período pós-tratamento (T3-T2) todas as medidas maxilares e mandibulares permaneceram estáveis, não apresentando recidiva significante da forma do arco e do Índice de Irregularidade de Little. O índice OGS não apresentou alterações significantes do fim do tratamento para o controle. Conclusão: O tratamento com aparelho autoligável do Sistema Damon apresentou aumentos na forma e comprimento do arco, mantendo-se estáveis após o período de contenção. O tratamento com este Sistema promoveu o alinhamento dos incisivos tanto superiores quanto inferiores, com resultados oclusais estáveis após um período médio de 3 anos pós-tratamento.(AU)


Subject(s)
Humans , Male , Female , Adolescent , Dental Arch/pathology , Dental Occlusion , Malocclusion, Angle Class I/therapy , Orthodontic Appliances , Analysis of Variance , Dental Arch/diagnostic imaging , Malocclusion, Angle Class I/diagnostic imaging , Orthodontic Appliance Design , Radiography, Panoramic , Time Factors , Treatment Outcome
9.
Braz. oral res. (Online) ; 31: e46, 2017. tab, graf
Article in English | LILACS | ID: biblio-839517

ABSTRACT

Abstract This study aimed at monitoring the maxillary growth of children with cleft lip/palate in the first two years of life, and to evaluate the effects of primary surgeries on dental arch dimensions. The sample consisted of the three-dimensional digital models of 25 subjects with unilateral complete cleft lip and palate (UCLP) and 29 subjects with isolated cleft palate (CP). Maxillary arch dimensions were measured at 3 months (before lip repair), 1 year (before palate repair), and at 2 years of age. Student’s ttest was used for comparison between the groups. Repeated measures ANOVA followed by Tukey’s test was used to compare different treatment phases in the UCLP group. Paired ttest was used to compare different treatment phases in the CP group. P<0.05 was considered statistically significant. Decreased intercanine distance and anterior arch length were observed after lip repair in UCLP. After palate repair, maxillary dimensions increased significantly, except for the intercanine distance in UCLP and the intertuberosity distance in both groups. At the time of palate repair and at two years of age, the maxillary dimensions were very similar in both groups. It can be concluded that the maxillary arches of children with UCLP and CP changed as a result of primary surgery.


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Cleft Lip/surgery , Cleft Palate/surgery , Imaging, Three-Dimensional/methods , Dental Arch/growth & development , Maxilla/growth & development , Reference Values , Time Factors , Cephalometry , Analysis of Variance , Cleft Lip/rehabilitation , Cleft Palate/rehabilitation , Age Factors , Treatment Outcome , Dental Arch/pathology , Anatomic Landmarks , Medical Illustration
10.
Dental press j. orthod. (Impr.) ; 20(3): 64-68, May-Jun/2015. tab, graf
Article in English | LILACS | ID: lil-751410

ABSTRACT

OBJECTIVE: The aim of this longitudinal study, comprising young adults without orthodontic treatment, was to assess spontaneous changes in lower dental arch alignment and dimensions. METHODS: Twenty pairs of dental casts of the lower arch, obtained at different time intervals, were compared. Dental casts obtained at T1 (mean age = 20.25) and T2 (mean age = 31.2) were compared by means of paired t-test (p < 0.05). RESULTS: There was significant reduction in arch dimensions: 0.43 mm for intercanine (p = 0.0089) and intermolar (p = 0.022) widths, and 1.28 mm for diagonal arch length (p < 0.001). There was a mild increase of approximately 1 mm in the irregularity index used to assess anterior alignment (p < 0.001). However, regression analysis showed that changes in the irregularity index revealed no statistically significant association with changes in the dental arch dimensions (p > 0.05). Furthermore, incisors irregularity at T2 could not be predicted due to the severity of this variable at T1 (p = 0.5051). CONCLUSION: Findings suggest that post-growth maturation of the lower dental arch leads to a reduction of dental arch dimensions as well as to a mild, yet significant, increase in dental crowding, even in individuals without orthodontic treatment. Furthermore, dental alignment in the third decade of life cannot be predicted based on the severity of dental crowding at the end of the second decade of life. .


OBJETIVO: o objetivo deste trabalho foi avaliar, por meio de um estudo longitudinal em adultos jovens, sem tratamento ortodôntico, as alterações espontâneas do alinhamento da arcada dentária inferior e de suas dimensões. MÉTODOS: vinte pares de modelos de gesso da arcada inferior foram obtidos em dois tempos. No primeiro exame (T1), os indivíduos tinham, em média, 20,25 anos; enquanto no segundo exame (T2) a média de idade foi de 31,2 anos. Comparações entre os tempos T1 e T2 foram realizadas usando o teste t pareado (p < 0,05). RESULTADOS: houve uma redução significativa nas dimensões da arcada - de 0,43mm nas larguras intercaninos (p = 0,0089) e intermolares (p = 0,022) e de 1,28mm para o comprimento diagonal da arcada (p < 0,001). Foi observado um aumento suave, de aproximadamente 1mm, no índice de irregularidade anterior (p < 0,001). Entretanto, a análise de regressão mostrou que as mudanças no índice de irregularidade não revelaram uma associação estatisticamente significativa com as mudanças na arcada dentária (p > 0,05). Além disso, o índice de irregularidade dos incisivos em T2 não pode ser estimado, devido à severidade dessa variável em T1 (p = 0,5051). CONCLUSÃO: esses achados sugerem que a maturação da arcada dentária inferior, pós-crescimento, leva a uma redução das dimensões da arcada e um aumento suave, porém significativo, do apinhamento dentário, mesmo em indivíduos sem tratamento ortodôntico. Assim, o alinhamento dentário na terceira década de vida não pode ser previsto tendo como base a severidade do apinhamento dentário ao final da segunda década de vida. .


Subject(s)
Humans , Male , Female , Adolescent , Adult , Young Adult , Tooth/pathology , Dental Arch/pathology , Mandible/pathology , Cephalometry/methods , Longitudinal Studies , Cuspid/pathology , Incisor/pathology , Molar/pathology , Odontometry/methods
11.
Dental press j. orthod. (Impr.) ; 20(3): 50-57, May-Jun/2015. tab, graf
Article in English | LILACS | ID: lil-751404

ABSTRACT

OBJECTIVE: The aim of the present study was to compare dentoalveolar changes in mandibular arch, regarding transversal measures and buccal bone thickness, in patients undergoing the initial phase of orthodontic treatment with self-ligating or conventional bracket systems. METHODS: A sample of 25 patients requiring orthodontic treatment was assessed based on the bracket type. Group 1 comprised 13 patients bonded with 0.022-in self-ligating brackets (SLB). Group 2 included 12 patients bonded with 0.022-in conventional brackets (CLB). Cone-beam computed tomography (CBCT) scans and a 3D program (Dolphin) assessed changes in transversal width of buccal bone (TWBB) and buccal bone thickness (BBT) before (T1) and 7 months after treatment onset (T2). Measurements on dental casts were performed using a digital caliper. Differences between and within groups were analyzed by Student's t-test; Pearson correlation coefficient was also calculated. RESULTS: Significant mandibular expansion was observed for both groups; however, no significant differences were found between groups. There was significant decrease in mandibular buccal bone thickness and transversal width of buccal bone in both groups. There was no significant correlation between buccal bone thickness and dental arch expansion. CONCLUSIONS: There were no significant differences between self-ligating brackets and conventional brackets systems regarding mandibular arch expansion and changes in buccal bone thickness or transversal width of buccal bone. .


OBJETIVO: o objetivo do presente estudo foi comparar as alterações dentoalveolares transversais e a espessura óssea da arcada inferior em pacientes submetidos ao tratamento ortodôntico utilizando sistemas de braquetes autoligáveis ou convencionais. MÉTODOS: uma amostra de 25 pacientes requerendo tratamento ortodôntico foi recrutada com base no tipo de braquete. No Grupo 1, 13 pacientes foram tratados com braquetes autoligáveis (SLB, slot 0,022"); o Grupo 2 incluiu 12 pacientes, nos quais foram colados braquetes convencionais (CLB, slot 0,022"). Utilizou-se tomografia computadorizada de feixe cônico e um programa 3D (Dolphin) para avaliar as alterações pré-tratamento (T1) e 7 meses após o início desse (T2). As medições em modelos de gesso foram realizadas com o auxílio de um paquímetro digital. As diferenças intergrupos, bem como intragrupo, foram analisadas por meio de teste t de Student. Além disso, o coeficiente de correlação de Pearson foi utilizado. RESULTADOS: alterações dentoalveolares significativas foram observadas em ambos os grupos. Entretanto, não houve diferenças significativas entre os grupos. Houve uma diminuição da espessura óssea na região posterior e das medidas transversais em ambos os grupos. Não houve uma correlação significativa entre a espessura óssea posterior e a expansão da arcada dentária, em nenhum dos dois sistemas de braquetes utilizados. CONCLUSÕES: comparando-se o uso dos aparelhos autoligáveis e convencionais, concluiu-se que não houve diferenças dentoalveolares significativas quanto à expansão da arcada inferior e quanto à espessura óssea posterior. .


Subject(s)
Humans , Adolescent , Adult , Young Adult , Tooth/pathology , Orthodontic Brackets/classification , Orthodontic Appliance Design , Dental Arch/pathology , Models, Dental , Cone-Beam Computed Tomography/methods , Mandible/pathology , Orthodontic Wires , Tooth/diagnostic imaging , Bicuspid/diagnostic imaging , Cephalometry/methods , Prospective Studies , Tooth Crown/diagnostic imaging , Imaging, Three-Dimensional/methods , Dental Arch/diagnostic imaging , Malocclusion, Angle Class I/therapy , Mandible/diagnostic imaging , Molar/diagnostic imaging
12.
Dental press j. orthod. (Impr.) ; 19(6): 70-77, Nov-Dec/2014. tab
Article in English | LILACS | ID: lil-732438

ABSTRACT

OBJECTIVE: The aim of this retrospective study was to compare the longitudinal stability of two types of posterior crossbite correction: rapid maxillary expansion (RME) and slow maxillary expansion (SME). METHODS: Study casts of 90 adolescent patients were assessed for interdental width changes at three different periods: pretreatment (T1), post-treatment (T2) and at least, five years post-retention (T3). Three groups of 30 patients were established according to the treatment received to correct posterior crossbite: Group A (RME), group B (SME) and group C (control- Edgewise therapy only). After crossbite correction, all patients received fixed edgewise orthodontic appliances. Paired t-tests and one-way ANOVA were used to identify significant intra and intergroup changes, respectively (P < 0.05). RESULTS: Except for intercanine distance, all widths increased in groups A and B from T1 to T2. In the long-term, the amount of relapse was not different for groups A and B, except for 3-3 widths which showed greater decrease in group A. However, the percentage of clinically relapsed cases of posterior crossbite was similar for rapid and slow maxillary expansion. CONCLUSION: Rapid and slow maxillary expansion showed similar stability in the long-term. .


OBJETIVO: o objetivo desse estudo retrospectivo foi comparar a estabilidade em longo prazo em dois tipos de correção da mordida cruzada posterior, sendo a expansão rápida (ERM) e a expansão lenta da maxila (ELM). MÉTODOS: modelos de estudos de 90 pacientes adolescentes foram avaliados quanto às alterações na largura interdentária em três diferentes tempos: pré-tratamento (T1), pós-tratamento (T2) e pelo menos cinco anos pós-contenção (T3). Três grupos de 30 pacientes foram definidos de acordo com o tratamento realizado para a correção da mordida cruzada posterior: Grupo A (ERM), grupo B (ELM) e grupo C (controle - apenas tratamento com técnica Edgewise). Após correção da mordida cruzada, todos pacientes receberam aparelhos ortodônticos fixos corretivos Edgewise. Teste t pareado e análise de variância a um critério (ANOVA) foram realizados para identificar alterações significantes intra- e intergrupos, respectivamente (p < 0,05). RESULTADOS: exceto para a distância intercaninos, todas as larguras aumentaram nos grupos A e B de T1 para T2. Em longo prazo, a quantidade de recidiva não foi diferente para os grupos A e B, exceto para a largura 3-3, que apresentou uma maior diminuição no grupo A. Clinicamente, entretanto, a porcentagem de casos com recidivas da mordida cruzada posterior foi semelhante para expansões rápida e lenta da maxila. CONCLUSÃO: Expansões rápida e lenta da maxila apresentaram estabilidades semelhantes em longo prazo. .


Subject(s)
Adolescent , Child , Female , Humans , Male , Palatal Expansion Technique , Bicuspid/pathology , Bicuspid/surgery , Cohort Studies , Cephalometry/methods , Cuspid/pathology , Dental Arch/pathology , Longitudinal Studies , Malocclusion/therapy , Maxilla/pathology , Molar/pathology , Orthodontic Appliance Design , Orthodontic Retainers , Palatal Expansion Technique/instrumentation , Recurrence , Retrospective Studies , Tooth Extraction , Tooth Movement Techniques/instrumentation , Tooth Movement Techniques/methods
13.
Dental press j. orthod. (Impr.) ; 19(4): 71-79, Jul-Aug/2014. tab, graf
Article in English | LILACS | ID: lil-725427

ABSTRACT

INTRODUCTION: This study assessed the three-dimensional changes in the dental arch of patients submitted to orthodontic-surgical treatment for correction of Class II malocclusions at three different periods. METHODS: Landmarks previously identified on upper and lower dental casts were digitized on a three-dimensional digitizer MicroScribe-3DX and stored in Excel worksheets in order to assess the width, length and depth of patient's dental arches. RESULTS: During orthodontic preparation, the maxillary and mandibular transverse dimensions measured at the premolar regions were increased and maintained throughout the follow-up period. Intercanine width was increased only in the upper arch during orthodontic preparation. Maxillary arch length was reduced during orthodontic finalization, only. Upper and lower arch depths were stable in the study periods. Differences between centroid and gingival changes suggested that upper and lower arch premolars buccaly proclined during the pre-surgical period. CONCLUSIONS: Maxillary and mandibular dental arches presented transverse expansion at premolar regions during preoperative orthodontic preparation, with a tendency towards buccal tipping. The transverse dimensions were not altered after surgery. No sagittal or vertical changes were observed during the follow-up periods. .


INTRODUÇÃO: esse estudo avaliou as alterações tridimensionais ocorridas na morfologia das arcadas dentárias de pacientes submetidos ao tratamento ortodôntico-cirúrgico para a correção da má oclusão de Classe II, em três períodos distintos: (T1) modelos iniciais, (T2) modelos pré-cirúrgicos imediatos (de 1 a 15 dias antes da cirurgia) e (T3) modelos pós-cirúrgicos (mínimo de 6 meses após a remoção do aparelho ortodôntico). MÉTODOS: pontos previamente demarcados em cada modelo foram digitalizados por meio do digitalizador tridimensional MicroScribe-3DX, cujas coordenadas, armazenadas em planilhas do programa Excel, deram origem a valores que possibilitaram a avaliação da largura, comprimento e profundidade das arcadas dentárias. RESULTADOS: durante o preparo ortodôntico, houve aumentos nas distâncias transversais superiores e inferiores medidas na região de pré-molares que se mantiveram no período total de acompanhamento. Apenas a distância intercaninos superior apresentou alterações de aumento durante o preparo ortodôntico, assim como a largura da arcada superior, que diminuiu durante a fase de finalização. A profundidade de ambas as arcadas manteve-se estável nas fases avaliadas. Diferenças entre as mudanças dos pontos centroide e gengival sugerem que os pré-molares superiores e inferiores inclinaram para vestibular durante o preparo ortodôntico pré-cirúrgico. CONCLUSÇÕES: conclui-se que as arcadas dentárias superiores e inferiores sofreram expansão transversal na região de pré-molares durante o preparo ortodôntico pré-cirúrgico, com tendência à inclinação vestibular de todos os dentes posteriores. Após a cirurgia, as dimensões transversais ...


Subject(s)
Adolescent , Adult , Female , Humans , Male , Young Adult , Dental Arch/pathology , Imaging, Three-Dimensional/methods , Malocclusion, Angle Class II/therapy , Orthodontics, Corrective/methods , Orthognathic Surgical Procedures/methods , Anatomic Landmarks/pathology , Bicuspid/pathology , Cephalometry/methods , Cuspid/pathology , Models, Dental , Dental Arch/surgery , Follow-Up Studies , Image Processing, Computer-Assisted/methods , Malocclusion, Angle Class II/surgery , Mandible/pathology , Mandible/surgery , Maxilla/pathology , Maxilla/surgery , Molar/pathology , Osteotomy, Le Fort/methods , Osteotomy, Sagittal Split Ramus/methods , Retrospective Studies
14.
Dental press j. orthod. (Impr.) ; 19(3): 139-157, May-Jun/2014. graf
Article in English | LILACS | ID: lil-723145

ABSTRACT

INTRODUCTION: Orthodontics, just as any other science, has undergone advances in technology that aim at improving treatment efficacy with a view to reducing treatment time, providing patients with comfort, and achieving the expected, yet hardly attained long-term stability. The current advances in orthodontic technology seem to represent a period of transition between conventional brackets (with elastic ligatures) and self-ligating brackets systems. Scientific evidence does not always confirm the clear clinical advantages of the self-ligating system, particularly with regard to reduced time required for alignment and leveling (a relatively simple protocol), greater comfort for patients, and higher chances of performing treatment without extractions - even though the number of extractions is more closely related to patient's facial morphological pattern, regardless of the technique of choice. Orthodontics has recently and brilliantly used bracket individualization in compensatory treatment with a view to improving treatment efficacy with lower biological costs and reduced treatment time. OBJECTIVE: This paper aims at presenting a well-defined protocol employed to produce a better treatment performance during this period of technological transition. It explores the advantages of each system, particularly with regards to reduced treatment time and increased compensatory tooth movement in adult patients. It particularly addresses compensable Class III malocclusions, comparing the system of self-ligating brackets, with which greater expansive and protrusive tooth movement (maxillary arch) is expected, with conventional brackets Capelozza Prescription III, with which maintaining the original form of the arch (mandibular arch) with as little changes as possible is key to yield the desired results. .


INTRODUÇÃO: a Ortodontia passa, como toda ciência, por constantes evoluções tecnológicas que buscam aumentar a efetividade da abordagem terapêutica, visando a diminuição do tempo de tratamento, o aumento do conforto para os pacientes, bem como a obtenção da tão almejada, e pouco alcançada, estabilidade em longo prazo. O estágio atual de desenvolvimento tecnológico da Ortodontia representa, ao que tudo indica, uma fase de transição entre os sistemas convencionais de ligação (com módulos elásticos) e os chamados autoligáveis. As evidências científicas nem sempre consubstanciam a clara percepção clínica das vantagens desse sistema, no que diz respeito a um menor tempo de alinhamento e nivelamento, uma relativa simplificação técnica, maior conforto para os pacientes, além do aumento da capacidade de tratamento sem extrações - embora essa indicação esteja mais ligada à avaliação do padrão morfológico facial, e menos a qualquer escolha técnica. Desde um passado recente e não menos brilhante, a Ortodontia vem utilizando a individualização de braquetes para tratamentos compensatórios, buscando aumentar a efetividade da abordagem terapêutica, com menores custos biológicos e menor tempo de tratamento. OBJETIVO: o presente artigo tem como objetivo apresentar um protocolo bem definido de melhor aproveitamento dessa fase de transição tecnológica, buscando explorar o que cada sistema tem de melhor, principalmente sob a óptica da redução do tempo de tratamento e aumento da capacidade de movimentação dentária compensatória em pacientes adultos. Especificamente, serão abordadas as más oclusões de Classe III compensáveis, usando o sistema de braquetes ...


Subject(s)
Adult , Female , Humans , Male , Young Adult , Orthodontic Appliance Design , Orthodontic Brackets/classification , Clinical Protocols , Cephalometry/methods , Decision Making , Dental Arch/pathology , Malocclusion, Angle Class III/diagnosis , Malocclusion, Angle Class III/therapy , Mandible/pathology , Maxilla/pathology , Overbite/diagnosis , Overbite/therapy , Patient Care Planning , Prognathism/diagnosis , Prognathism/therapy , Technology, Dental , Time Factors , Treatment Outcome , Tooth Movement Techniques/instrumentation , Tooth Movement Techniques/methods
15.
Dental press j. orthod. (Impr.) ; 19(2): 39-45, Mar-Apr/2014. tab, graf
Article in English | LILACS | ID: lil-714620

ABSTRACT

Objective: The aim of the present study was to evaluate the transverse effect of rapid maxillary expansion in patients with unilateral complete cleft lip and palate while comparing the Haas and Hyrax appliances. Methods: The sample consisted of 48 patients divided into two groups: Group I - 25 patients treated with modified Haas appliance (mean age: 10 years 8 months); and Group II - 23 patients treated with Hyrax appliance (mean age: 10 years 6 months). Casts were taken during pre-expansion and after removal of the appliance at the end of the retention period. The models were scanned with the aid of the 3 Shape R700 3D scanner. Initial and final transverse distances were measured at cusp tips and cervical-palatal points of maxillary teeth by using the Ortho Analyzer(tm) 3D software. Results: The mean expansion obtained between cusp tips and cervical-palatal points for inter-canine width was 4.80 mm and 4.35 mm with the Haas appliance and 5.91 mm and 5.91 mm with the Hyrax appliance. As for first premolars or first deciduous molars, the values obtained were 6.46 mm and 5.90 mm in the Haas group and 7.11 mm and 6.65 mm in the Hyrax group. With regard to first molars, values were 6.11 mm and 5.24 mm in the Haas group and 7.55 mm and 6.31 mm in the Hyrax group. Conclusion: Rapid maxillary expansion significantly increased the transverse dimensions of the upper dental arch in patients with cleft palate, with no significant differences between the Hass and Hyrax expanders. .


Objetivo: avaliar o efeito transversal na arcada dentária superior do procedimento de expansão rápida da maxila em pacientes com fissura transforame incisivo Aunilateral, comparando os expansores tipo Haas modificado e de Hyrax. Métodos: a amostra constou de 48 pacientes divididos em dois grupos: grupo I, 25 pacientes que utilizaram o aparelho expansor tipo Haas modificado, com média de idade de 10 anos e 8 meses; e grupo II, 23 pacientes que utilizaram o Hyrax, com média de idade de 10 anos e 6 meses. Modelos de gesso foram realizados na fase pré-expansão e após 6 meses de contenção, após a remoção do aparelho. Os modelos foram digitalizados com auxílio do scanner 3Shape R700 3D e as distâncias transversais iniciais e finais foram medidas entre as pontas de cúspides e pontos cervicopalatinos de dentes superiores pelo método digital no software OrthoAnalyserT 3D. Resultados: a média de expansão obtida entre as pontas de cúspides e entre os pontos cervicopalatinos, respectivamente, para a distância intercaninos, foi de 4,80mm e 4,35mm para o Haas e de 5,91mm e 5,91mm para o Hyrax; 6,46mm e 5,90mm para os primeiros molares decíduos ou primeiros pré-molares no grupo Haas, 7,11mm e 6,65mm no grupo Hyrax; e 6,11mm e 5,24mm para os primeiros molares no grupo Haas e 7,55mm e 6,31mm no grupo Hyrax. Conclusão: o procedimento de expansão rápida da maxila produziu aumentos significativos das dimensões transversais da arcada dentária superior em pacientes com fissura, sem diferenças significativas entre os expansores Haas modificado e Hyrax. .


Subject(s)
Adolescent , Child , Humans , Young Adult , Cleft Lip/pathology , Cleft Palate/pathology , Dental Arch/pathology , Maxilla/pathology , Orthodontic Appliance Design , Palatal Expansion Technique/instrumentation , Bicuspid/pathology , Cephalometry/methods , Cuspid/pathology , Image Processing, Computer-Assisted/methods , Malocclusion/pathology , Molar/pathology , Prospective Studies , Tooth, Deciduous/pathology
16.
Pakistan Oral and Dental Journal. 2014; 34 (1): 83-86
in English | IMEMR | ID: emr-157670

ABSTRACT

Malrelation along the transverse plane is one of the most common causes of malocclusion and can be assessed by considering the intercanine and intermolar widths. An endeavour was undertaken to find the intercanine and intermolar widths on 76 dental casts of the individuals having Class I, Class II division 1, Class II division 2, Class III and Class II subdivision malocclusions, visiting orthodontic department of Sardar Begum dental college and hospital, Peshawar. Results were obtained using SPSS version 20 which showed the mean maxillary intermolar widths of 34.6mm*, 34.5mm, 30.9mm, 34.7 mm and 34.18mm for Class I, Class II division 1,Class II division 2,Class III and Class II subdi-vision groups respectively. Mean maxillary intercanine widths were found to be 24.16mm, 24.5mm, 24.6mm, 23.9mm and 23.05mm for Class I, Class II division 1,Class II division 2,Class III and Class II subdivision groups respectively. Similarly mean mandibular intermolar widths were 32.8mm, 33.02mm, 30.3mm, 33.1mm and 32.8mm for Class I, Class II division 1, Class II division 2, Class III and Class II subdivision groups respectively. While mean mandibular intercanine widths were found to be 19.2mm,19.06mm,20.34mm,19.54mm and 18.75mm for the Class I, Class II division 1,Class II division 2,Class III and Class II subdivision groups respectively. ANOVA analysis showed no sta-tistical significant differences in the intermolar and intercanine widths among the five malocclusion groups


Subject(s)
Humans , Dental Arch/pathology , Malocclusion, Angle Class III/pathology , Malocclusion, Angle Class II/pathology , Malocclusion, Angle Class I/pathology , Dentition, Mixed , Analysis of Variance
17.
Dental press j. orthod. (Impr.) ; 18(6): 31-37, Nov.-Dec. 2013. ilus, tab
Article in English | LILACS | ID: lil-697728

ABSTRACT

INTRODUCTION: A wide variety of orthodontic wires made of different alloys is available to be used in orthodontic practice and may produce different clinical responses during tooth movement. OBJECTIVE: This research evaluated the alignment and leveling of lower dental arches after the use of three types of orthodontic wires. METHODS: A sample of 36 patients was randomly divided into 3 groups: stainless steel, multistranded steel and superelastic nickel-titanium, according to the first leveling arches used. In order to observe differences in tooth position and axial inclination of the lower incisors, all patients had lateral cephalometric radiographs taken before the insertion of the first arches and 2 months later. The irregularity index and the curve of Spee were measured, compared between groups and considered influential on the proclination of incisors during the initial phase of alignment and leveling. The Reflex microscope was used to measure the irregularity index, whereas the ANOVA analysis of variance was used to verify differences between groups with regard to the degree of dental alignment and leveling. RESULTS: There were significant differences between groups only at T2 for the irregularity index. CONCLUSION: The NiTi and multistranded steel wires showed greater aligning capacity when compared with stainless steel wires.


INTRODUÇÃO: uma grande variedade de fios ortodônticos, compostos por diferentes ligas, está disponível para utilização ortodôntica, podendo gerar respostas clínicas diversas, durante a movimentação dentária. OBJETIVO: este trabalho visa a avaliar o alinhamento e nivelamento das arcadas dentárias inferiores, após a utilização de três tipos de fios ortodônticos. MÉTODOS: uma amostra de 36 pacientes foi aleatoriamente dividida em três grupos, de acordo com os primeiros arcos utilizados para o alinhamento e nivelamento: aço inoxidável convencional, aço multifilamentado e de níquel-titânio superelástico. Para se avaliar as diferenças relacionadas ao posicionamento dentário e inclinação axial dos incisivos inferiores, foram obtidas radiografias cefalométricas de perfil, de todos os pacientes, em duas fases do tratamento: antes da inserção dos primeiros arcos e dois meses após a inserção dos mesmos. O índice de irregularidade dentária (IID) e a profundidade inicial de curva de Spee, fatores influentes sobre a projeção de incisivos durante a fase inicial de alinhamento e nivelamento, foram avaliados e comparados intra- e intergrupos. Para a medição do IID, foi utilizado o Reflex Microscope, possibilitando a mensuração do grau de alinhamento e nivelamento dentário em terceira dimensão. A análise de variância (ANOVA) foi utilizada para se avaliar as diferenças intergrupos em relação ao grau de alinhamento e nivelamento dentário. RESULTADOS: diferenças estatisticamente significativas intergrupos somente foram encontradas em T2, em relação ao índice de irregularidade dentária, já que os fios de NiTi e aço multifilamentado apresentaram maior capacidade de alinhamento do que os fios de aço inoxidável convencionais.


Subject(s)
Adolescent , Female , Humans , Male , Dental Alloys/chemistry , Orthodontic Appliance Design , Orthodontic Wires , Tooth Movement Techniques/instrumentation , Cephalometry/methods , Dental Arch/pathology , Elasticity , Follow-Up Studies , Incisor/pathology , Malocclusion/pathology , Malocclusion/therapy , Mandible/pathology , Nickel/chemistry , Patient Care Planning , Surface Properties , Stainless Steel/chemistry , Treatment Outcome , Titanium/chemistry
18.
Dental press j. orthod. (Impr.) ; 18(6): 106-111, Nov.-Dec. 2013. ilus, tab
Article in English | LILACS | ID: lil-697738

ABSTRACT

OBJECTIVE: This study assessed the anterior-posterior positioning of the upper and lower first molars, and the degree of rotation of the upper first molars in individuals with Class II, division 1, malocclusion. METHODS: Asymmetry I, an accurate device, was used to assess sixty sets of dental casts from 27 females and 33 males, aged between 12 and 21 years old, with bilateral Class II, division 1. The sagittal position of the molars was determined by positioning the casts onto the device, considering the midpalatal suture as a symmetry reference, and then measuring the distance between the mesial marginal ridge of the most distal molar and the mesial marginal ridge of its counterpart. With regard to the degree of rotation of the upper molar, the distance between landmarks on the mesial marginal ridge was measured. Chi-square test with a 5% significance level was used to verify the variation in molars position. Student's t test at 5% significance was used for statistical analysis. RESULTS: A great number of lower molars mesially positioned was registered, and the comparison between the right and left sides also demonstrated a higher number of mesially positioned molars on the right side of both arches. The average rotation of the molars was found to be 0.76 mm and 0.93 mm for the right and left sides, respectively. CONCLUSION: No statistically significant difference was detected between the mean values of molars mesialization regardless of the side and arch. Molars rotation, measured in millimeters, represented » of Class II.


OBJETIVO: esse estudo avaliou o posicionamento anteroposterior dos primeiros molares superiores (1º MS) e inferiores, e o grau de rotação dos 1º MS, em indivíduos com má oclusão de Classe II, divisão 1. MÉTODOS: mensuraram-se, em aparelho de precisão Assimetria I, 60 pares de modelos, de 27 indivíduos do sexo feminino e 33 do masculino, entre 12 e 21 anos de idade, com má oclusão de Classe II, divisão 1. Utilizando a sutura palatina mediana como referência de eixo de simetria, os modelos foram posicionados no aparelho para mensuração da distância entre a crista marginal mesial do molar mais distal e a crista marginal mesial do molar do lado oposto, a fim de verificar o posicionamento sagital dos molares. Em relação à giroversão, mediu-se a distância entre pontos na crista marginal mesial. O teste qui-quadrado a 5% foi utilizado para verificar a variação de posicionamento dos molares, por arcos e por lado. O teste t de Student a 5% foi utilizado para comparar esses valores. RESULTADOS: houve maior número de molares inferiores mesializados e, comparando os lados, maior número de molares mesializados no lado direito em ambas as arcadas. As rotações médias dos molares foram de 0,76mm do lado direito e 0,93mm do esquerdo. CONCLUSÃO: não houve diferença estatisticamente significativa entre os valores médios das mesializações dos molares quanto a lado ou arco. Quando observada isoladamente, a rotação dos molares, quantificada em milímetros, representou uma situação de » de Classe II.


Subject(s)
Adolescent , Child , Female , Humans , Male , Young Adult , Malocclusion, Angle Class II/pathology , Mandible/pathology , Maxilla/pathology , Molar/pathology , Anatomic Landmarks/pathology , Cephalometry/instrumentation , Models, Dental , Dental Arch/pathology , Odontometry/instrumentation , Rotation
19.
J. appl. oral sci ; 21(5): 437-442, Sep-Oct/2013. tab, graf
Article in English | LILACS, BBO | ID: lil-690087

ABSTRACT

OBJECTIVE: The purpose of this present study was to compare, by means of 3D digital casts, the anterior transverse dimension of the dental arch of newborns with and without cleft lip and palate. MATERIAL AND METHODS: The sample was composed of ninety-four children aged from 3 to 9 months divided into three study groups: Group I - children without craniofacial deformities (control group); Group II - children with unilateral cleft lip and palate; Group III - children with bilateral cleft lip and palate. Impressions were executed before lip and palate repair in patients with clefts. Dental casts were digitized using a 3D scanner linked to a computer. Measurements of the intercanine distance were measured on the digital casts. Intergroup comparisons were performed using ANOVA (p<0.05). RESULTS: The results showed a mean of 36.5 mm for unilateral cleft lip and palate group, 34.8 mm for bilateral cleft lip and palate group and 27.52 mm for the control group. There was a statistically significant difference between the control group and both groups of patients with cleft lip and palate. There was no statistically significant difference between complete unilateral and bilateral cleft lip and palate groups. CONCLUSIONS: Patients with complete cleft lip and palate were born with an increased anterior dimension of the maxillary dental arch compared to non cleft patients. .


Subject(s)
Humans , Male , Female , Infant , Cleft Lip/pathology , Cleft Palate/pathology , Dental Arch/anatomy & histology , Models, Dental , Analysis of Variance , Anatomic Landmarks , Case-Control Studies , Dental Arch/pathology , Dental Impression Technique , Imaging, Three-Dimensional , Medical Illustration , Reference Values
20.
Dental press j. orthod. (Impr.) ; 18(3): 39-45, May-June 2013. ilus, tab
Article in English | LILACS | ID: lil-689996

ABSTRACT

OBJECTIVE: The present study aimed at analyzing, with the use of dental casts, the transverse changes of the upper and lower dental arches, after non-extraction orthodontic treatment, with self-ligating brackets. METHODS: The sample comprised 29 patients, all presenting Class I malocclusion with upper and lower crowding of at least 4 mm and treated only with a fixed appliance, without stripping, extraction or distalization. The dental casts were obtained before and after leveling with 0.019 x 0.025-in stainless steel archwires. CONCLUSION: The results indicated that the majority of transverse changes occurred at the premolar areas, both the first and the second, as well as on the upper and lower dental arches. The intercanine distance increased 0.75 mm, on average, in the upper arch and 1.96 mm in the lower arch. The molars also demonstrated a tendency towards an increase in their transverse dimension, however, at a lower intensity comparing to premolars. All measurements presented statistically significant differences with the exception of the maxillary second molars.


OBJETIVO: o presente estudo teve por objetivo avaliar, em modelos de gesso, as alterações dimensionais transversais das arcadas dentárias, decorrentes do tratamento ortodôntico sem extração, com braquetes autoligáveis. MÉTODOS: a amostra constou de 29 pacientes que apresentavam má oclusão de Classe I, com apinhamento superior e inferior mínimo de 4mm, que foram tratados unicamente com aparelho fixo, sem desgastes, extração ou distalização dentária. Os modelos de gesso foram obtidos antes e ao final do tratamento. CONCLUSÃO: os resultados indicaram que as maiores alterações transversais ocorreram na região dos pré-molares, tanto dos primeiros como dos segundos, e tanto na maxila como na mandíbula. A distância intercaninos teve aumento, em média, de 0,75mm na arcada superior, e de 1,96mm na inferior. Os molares também demonstraram tendência de aumento das dimensões transversais, porém em menor intensidade que os pré-molares. Todas as medidas denotaram diferença estatisticamente significativa, com exceção dos segundos molares superiores.


Subject(s)
Adolescent , Adult , Child , Humans , Young Adult , Dental Arch/anatomy & histology , Dental Arch/pathology , Malocclusion, Angle Class I/therapy , Orthodontic Brackets , Tooth Movement Techniques/instrumentation , Copper , Models, Dental , Nickel , Odontometry , Orthodontic Appliance Design , Stainless Steel , Titanium , Tooth Extraction
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