ABSTRACT
The present study aimed to assess the perception and knowledge of Brazilian orthodontists on the ideal moment to treat Class II malocclusions. Questionnaires with open, semi-open and close questions were sent by e-mail to 1653 Brazilian orthodontists. These orthodontists were registered in the Brazilian Association of Orthodontics and Dentofacial Orthopedics (ABOR). One-hundred and three (9.86%) Orthodontists replied to the questionnaires. Most of them were males (60.5%) with specialization as the highest level of professional qualification (59.9%). Most of the orthodontists (51%) reported preference for treating Class II malocclusions in late mixed dentition, followed by the early mixed dentition (29%). The age range between 10 and 12 years old figured as the most prevalent in patients searching for treatment (42.7%). Most of the patients searching for treatment were females (69.7%). Preferences for functional orthopedic appliances were reported by 35% of the orthodontists. Brazilian orthodontists revealed a trend for treating patients with Class II malocclusions in the late mixed dentition. Female patients aged from 10 to 12 years old represented the majority of patients that search for orthodontic treatment. Functional orthopedic appliances were preferred by Brazilian orthodontists for treating Class II malocclusions.
Subject(s)
Attitude of Health Personnel , Clinical Competence , Malocclusion, Angle Class II/therapy , Orthodontists/statistics & numerical data , Adult , Aged , Aged, 80 and over , Brazil , Cross-Sectional Studies , Female , Humans , Male , Middle Aged , Prospective Studies , Surveys and Questionnaires , Young AdultABSTRACT
ABSTRACT The present study aimed to assess the perception and knowledge of Brazilian orthodontists on the ideal moment to treat Class II malocclusions. Questionnaires with open, semi-open and close questions were sent by e-mail to 1653 Brazilian orthodontists. These orthodontists were registered in the Brazilian Association of Orthodontics and Dentofacial Orthopedics (ABOR). One-hundred and three (9.86%) Orthodontists replied to the questionnaires. Most of them were males (60.5%) with specialization as the highest level of professional qualification (59.9%). Most of the orthodontists (51%) reported preference for treating Class II malocclusions in late mixed dentition, followed by the early mixed dentition (29%). The age range between 10 and 12 years old figured as the most prevalent in patients searching for treatment (42.7%). Most of the patients searching for treatment were females (69.7%). Preferences for functional orthopedic appliances were reported by 35% of the orthodontists. Brazilian orthodontists revealed a trend for treating patients with Class II malocclusions in the late mixed dentition. Female patients aged from 10 to 12 years old represented the majority of patients that search for orthodontic treatment. Functional orthopedic appliances were preferred by Brazilian orthodontists for treating Class II malocclusions.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Aged, 80 and over , Young Adult , Attitude of Health Personnel , Clinical Competence , Orthodontists/statistics & numerical data , Malocclusion, Angle Class II/therapy , Brazil , Cross-Sectional Studies , Prospective Studies , Surveys and QuestionnairesABSTRACT
Functional orthopedic appliances used for Class II malocclusion treatment, usually work by guiding jaws growth and modifying dental positions. Among these dentoalveolar effects, it is the lower incisors buccal tipping, that helps to improve the overjet, but may cause gingival recessions, especially when associated with other etiological factors. The objective of this study was to evaluate the clinical crown length of the lower anterior teeth in individuals with Angle's Class II malocclusion, after treatment with Fränkel-2 function regulator appliance (RF-2). Fifty Class II-malocclusion individuals were divided into 2 groups: G1 14 male, and 11 female, treated with the Fränkel-2 function regulator appliance for 18 months, with average pre-treatment age (T1) of 11 years (sd=7 months) and average post-treatment age (T2) of 12 years and 7 months (sd=7 months); and G2 a control group with 25 individuals (12 male and 13 female) with average age at T1 of 10 years and 3 months (sd=11 months) and at T2 of 12 years and 1 month (sd=11 months), which was part of a normal occlusion sample. The 100 dental cast models were analyzed at T1 and T2, with a digital caliper, measuring the distance from the incisal edge to the most concave portion of the gingival margin of lower incisors and canines. Data were checked by a Student's t-test and a paired t-test. Considering T2, the group 1 presented a significant increase in the crown length of all lower anterior teeth. On the other hand, in the group 2, this was observed only for the teeth 33, 42 and 43, suggesting that patients treated with RF-2 had more gingival recession than the control group.
Os aparelhos ortopédicos funcionais utilizados para o tratamento da má oclusão de Classe II normalmente atuam guiando o crescimento dos maxilares e modificando as posições dentais. Dentre esses efeitos dento alveolares está a inclinação dos incisivos inferiores para vestibular, o que auxilia na melhora do overjet, mas pode causar recessões gengivais, especialmente se associado a outros fatores etiológicos. O objetivo deste estudo foi avaliar o comprimento da coroa clínica dos dentes anteriores inferiores em indivíduos com má oclusão de Classe II, após o tratamento com o aparelho regulador de função Fränkel-2 (RF-2). Cinquenta indivíduos com Classe II foram divididos em dois grupos: G1 14 meninos e 11 meninas, tratados com o aparelho regulador de função Frankel-2, por 18 meses, com média de idade pré-tratamento (T1) de 11 anos (DP=7 meses) e média de idade pós-tratamento (T2) de 12 anos e 7 meses (DP=7 meses); e G2 um grupo controle com 25 indivíduos (12 meninos e 13 meninas) com média de idade em T1 de 10 anos e 3 meses (DP=11 meses) e em T2 de 12 anos e 1 mês (DP=11 meses), que fazia parte de uma amostra de oclusão normal. Os 100 modelos de gesso foram avaliados em T1 e T2, com um paquímetro digital, medindo a distância da borda incisal à parte mais côncava da margem gengival dos incisivos e caninos inferiores. Os dados foram checados pelo teste t de Student e pelo teste t pareado. Considerando T2, o grupo 1 apresentou um aumento significante no comprimento das coroas de todos os dentes anteriores inferiores. Por outro lado, no grupo 2, isto foi observado somente para os dentes 33, 42 e 43, sugerindo que os pacientes tratados com o RF-2 apresentaram mais recessões gengivais do que o grupo controle.
Subject(s)
Orthodontics , Crown Lengthening , Orthodontic Appliances, Functional , Gingival RecessionABSTRACT
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. CONCLUSIONS: 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.
Subject(s)
Malocclusion, Angle Class II/pathology , Mandible/pathology , Maxilla/pathology , Molar/pathology , Adolescent , Anatomic Landmarks/pathology , Cephalometry/instrumentation , Child , Dental Arch/pathology , Female , Humans , Male , Models, Dental , Odontometry/instrumentation , Rotation , Young AdultABSTRACT
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 , RotationABSTRACT
AIM: To verify the presence of Bolton anterior and total discrepancy in Brazilian individuals with natural normal occlusion and Angle's Class I and Class II, division 1 malocclusions. METHODS: The sample was divided in three groups (n=35 each): natural normal occlusion; Class I malocclusion; Class II, division 1 malocclusion. Of the 105 Caucasian Brazilian individuals, 24 were boys and 81 were girls aged from 13 to 17 years and 4 months. The mesiodistal width of the maxillary and mandibular teeth, from the left first molar to the right first molar, was measured on each pre-treatment dental plaster cast using a digital caliper accurate to 0.01 mm resolution. Values were tabulated and the Bolton ratio was applied. The Kolmogorov-Smirnov test was used to verify if data were normally distributed (p>0.2). For comparison between the values obtained and those from the Bolton standard, Student's t test was used and one-way ANOVA was used for comparisons among the 3 groups, with a significance level of 5% (p<0.05). RESULTS: For groups 1, 2 and 3, respectively, the total ratio found was 90.36% (SD 1.70), 91.17% (SD±2.58) and 90.76% (SD±2.45); and the anterior ratio was 77.73% (SD 2.39), 78.01% (SD 2.66) and 77.30% (SD 2.65). CONCLUSIONS: There was no significant difference among the groups regarding the values indicated in the Bolton ratio.
Subject(s)
Humans , Male , Female , Adolescent , Tooth Abnormalities/diagnosis , Malocclusion, Angle Class I/diagnosis , Malocclusion, Angle Class II/diagnosisABSTRACT
Abstract: There are many appliances that can be used to correct molar relationship, achieving upper molar distalization, in Class II malocclusion. This research aimed to study the dental effects promoted by lip bumper to retain maxillary molars that had previously been distalized using a Cetlin appliance in conjunction with headgear.
Subject(s)
Malocclusion, Angle Class II/therapy , Molar/physiology , Orthodontic Appliances , Orthodontic Retainers , Tooth Movement Techniques , Cephalometry , Child , Extraoral Traction Appliances , Female , Humans , Male , MaxillaABSTRACT
INTRODUCTION: This study evaluated changes in the smile characteristics of patients with maxillary constriction submitted to rapid maxillary expansion (RME). METHODS: The sample consisted of 81 extraoral photographs of maximum smile of 27 patients with mean age of 10 years, before expansion and 3 and 6 months after fixation of the expanding screw. The photographs were analyzed on the software Cef X 2001, with achievement of the following measurements: Transverse smile area, buccal corridors, exposure of maxillary incisors, gingival exposure of maxillary incisors, smile height, upper and lower lip thickness, smile symmetry and smile arch. Statistical analysis was performed by analysis of variance (ANOVA), at a significance level of 5%. RESULTS: RME promoted statistically significant increase in the transverse smile dimension and exposure of maxillary central and lateral incisors; maintenance of right and left side smile symmetry and of the lack of parallelism between the curvature of the maxillary incisal edges and lower lip border. CONCLUSIONS: RME was beneficial for the smile esthetics with the increase of the transverse smile dimension and exposure of maxillary central and lateral incisors.
INTRODUÇÃO: esse estudo avaliou as alterações das características do sorriso de pacientes com atresia maxilar submetidos à expansão rápida da maxila (ERM). MÉTODOS: a amostra consistiu de 81 fotografias extrabucais do sorriso máximo de 27 pacientes, com idade média de 10 anos, antes da expansão e aos três e seis meses após a fixação do parafuso expansor. As análises das fotografias foram realizadas por meio do programa Cef X 2001, e as seguintes medidas foram analisadas: dimensão transversal do sorriso, corredores bucais, quantidade de exposição dos incisivos superiores, exposição gengival dos incisivos superiores, altura do sorriso, espessuras dos lábios superior e inferior, simetria e arco do sorriso. As alterações no sorriso durante as diferentes fases foram avaliadas por meio da análise de variância (ANOVA), seguida pelo teste de comparações múltiplas de Bonferroni, com nível de significância de 5%. RESULTADOS: a ERM promoveu aumento estatisticamente significativo da dimensão transversal do sorriso e da quantidade de exposição dos incisivos centrais e laterais superiores; manutenção da simetria entre os lados direito e esquerdo e da falta de paralelismo entre a curvatura das bordas dos incisivos superiores e a do lábio inferior. CONCLUSÃO: a ERM beneficiou a estética do sorriso com o aumento da dimensão transversal do sorriso e da quantidade de exposição dos incisivos centrais e laterais superiores.
ABSTRACT
OBJECTIVE: To verify the presence and degree of asymmetry of dental arches in Brazilian individuals with natural normal occlusion and Class II, Divisions 1 and 2 malocclusions. METHODS: The study evaluated the symmetry of the maxillary and mandibular dental arches of 180 pairs of dental casts, divided into: Group I = 60 pairs of natural normal occlusion individuals; Group II = 60 pairs of Class II, Division 1 malocclusion individuals; and Group III = 60 pairs of Class II, Division 2 malocclusion individuals. A device was used to measure dental midline deviation and the canine tip in the dental arches (in degrees). It was also verified the distance of the upper canines from the palatal suture, intercanine distance, and anteroposterior upper and lower first molar position. RESULTS: Dental arches of individuals from all groups presented asymmetry, regardless of the presence of malocclusion. Group I showed a lower asymmetry degree in relation to Groups II and III. The asymmetry in Groups II and III was similar. CONCLUSION: The dental arches of individuals with natural normal occlusion and with Class II, Division 1 and Division 2 malocclusions showed asymmetry. The asymmetry degree was higher in the mandibular dental arches than in the maxillary dental arches in all 3 evaluated groups.
ABSTRACT
O objetivo deste estudo foi verificar as alturas de bordas incisais e pontas decúspide dos dentes em relação a seus adjacentes, para a orientação do posicionamento vertical de acessórios ortodônticos. Foram avaliados 59 pares de modelos em gesso, de indivíduos com oclusão normal natural. A distância da borda incisal ou ponta de cúspide dosdentes maxilares e mandibulares foi mensurada em relação à linha transversal. As médias das diferenças de altura entre dentes superiores foram: 0,56 mm a mais para o incisivo central(lC) em relação ao incisivo lateral (lL); 0,90 mm a mais para o canino (CAN) em relação ao IL; 0,16 mm a mais para o CAN em relação ao primeiro pré-molar (1° PM); 0,29 mm a mais para o 1° PM em relação ao segundo pré-molar (2° PM); 0,51 mm a mais para o 2° PM emrelação ao primeiro molar (1° MOL); 1,88 mm a mais para o 1° MOL em relação ao segundo molar (2° MOL). Para os dentes inferiores: 0,18 mm a mais para o IC em relação ao Il;0,72 mm a mais para o CAN em relação ao Il; 0,06 mm a mais para o CAN em relação ao 1° PM; 0,04 mm a menos para o 1° PM em relação ao 2° PM; 0,33 mm a menos para o 2° PM em relação ao 1° MOL; 1,77 mm a menos para o 1° MOL em relação ao 2° MOL. As alturasdas bordas incisais/oclusais dos dentes seguem um padrão em oclusões normais naturais. Não há dirnorfisrno sexual, exceto para um dente, não há variação entre os hemiarcos direito e esquerdo, maxilar e mandibular.
The aim of this research was to verify the differences in height among thecuspid tips of posterior teeth and the incisal edges of anterior teeth, in order to determine the ideal vertical position of orthodontic appliances in dental crowns. 59 pairs of dental casts of eaucasoid individuais with natural normal occlusion were used. The distance of theteeth's edge or cuspid tio of each arch was measured in relation to a Transversal Line. The average differences in clinical crown height among upper teeth were: 0.56 mm more for central incisor tCt) in relation to lateral incisor (LI); 0.90 mm more for canine (GAN) than LI; 0.16 mm more for eAN than first premolar (1 PM); 0.29 mm more for 1 PM than secondpremolar (2 PM); 0.51 mm more for 2 PM than first molar (1 MOL); and 1.88 mm more for 1 MOL than second molar 2 MOL. To lower teeth: 0.18 mm more for el than LI; 0.72 mm more for eAN than LI; 0.06 mm more for eAN than 1 PM; 0.04 mm less for 1PM than 2 PM; 0.33 mm less for 2 PM than 1 MOL; and 1.77 mm less for 1 MOL than 2 MOL. Theteeth cuspid tipsjincisal edges heights follow a pattern in natural normal occlusions. There isn't sexual dimorfism for almost ali teeth, and there isn't variation between right and left,maxillary and mandibular hemiarches.
Subject(s)
Humans , Male , Female , Adolescent , Tooth Crown , Dental Occlusion , Orthodontics , Tooth , Casts, Surgical , IncisorABSTRACT
Aim: To verify whether some factors could be related to Boltons anterior ratio: buccolingual thickness of upper incisors, mesiodistal tipping of upper incisors, overjet and overbite, and if there is gender dimorphism. Methods: Thirty-five pairs of dental casts with natural normal occlusion were evaluated, proceeding from 27 females and 8 male Caucasian individuals, aged between 13 years old and 17 years and 4 months (mean age: 15y8m). A digital caliper and a ruler were used to make the measurements. Results: The anterior ratio was 77.48% ± 2.22, being statistically similar to Boltons, 77.20% ± 1.65. Based on Pearsons correlation test, only the overbite presented relation to the anterior ratio. It was not found gender dimorphism. Conclusions: Overbite was inversely proportional to Boltons anterior ratio, hence, when the anterior ratio is increased, the overbite could be decreased and vice-versa.
Subject(s)
Tooth Crown , Dental Occlusion , OrthodonticsABSTRACT
O apinhamento dentário pode ser classificado, didaticamente, em primário, secundário e terciário, e se caracteriza pela sobreposição ou rotação dos dentes. O apinhamento terciário se manifesta na idade adulta, acomete mais a região anteriorinferior, é de origem multifatorial e pode necessitar de tratamento ortodôntico. Em vista das dúvidas remanescentes e contovérsias existentes sobre o assunto, o presente trabalho tem como objetivos discutir as possíveis causas do apinhamento terciário e ilustrar algumas opções terapêuticas.
Subject(s)
Humans , Female , Adult , Tooth Wear , Malocclusion/etiology , Malocclusion/therapyABSTRACT
INTRODUCTION: This study evaluated the effect of low-level laser irradiation on the speed of orthodontic tooth movement of canines submitted to initial retraction. METHODS: Twenty-six canines were retracted by using NiTi spring (force of 150 g/side). Thirteen of those were irradiated with diode laser (780 nm, 20 mW, 10 sec, 5 J/cm(2)) for 3 days, and the other 13 were not irradiated and thus were considered the control group. Patients were followed up for 4 months, and nine laser applications were performed (three each month). The movement of the canines was evaluated through 3D casts, and the statistical analysis was performed with ANOVA and Tukey tests (p < 0.05). Periapical radiographs of the studied teeth were submitted to Levander, Malmgreen, and alveolar bone ridge analyses to evaluate tissue integrity and were compared with the Wilcoxon test (p < 0.05). RESULTS: A statistically significant increase in the movement speed of irradiated canines was observed in comparison with nonirradiated canines in all evaluation periods. No statistically significant difference was observed in bone and root resorption of canines, whether irradiated or not. CONCLUSION: The diode laser used within the protocol guidelines increased the speed of tooth movement. This might reduce orthodontic treatment time.
Subject(s)
Acceleration , Cuspid/radiation effects , Lasers, Semiconductor/therapeutic use , Low-Level Light Therapy/methods , Tooth Movement Techniques , Adolescent , Analysis of Variance , Case-Control Studies , Child , Cuspid/diagnostic imaging , Female , Humans , Male , Orthodontic Brackets , Radiography , Reference Values , Sensitivity and Specificity , Statistics, Nonparametric , Young AdultABSTRACT
Introdução e objetivo: Procurou-se avaliar cefalometricamente o espaço disponível para erupção dos segundos e terceiros molares superiores permanentes na região da tuberosidade maxilar após a distalização dos primeiros molares superiores. Material e métodos: A amostra foi constituída de 38 telerradiografias em norma lateral direita, de 19 pacientes brasileiros, leucodermas e melanodermas, com idade média de 9 anos e 5 meses, obtidas no início e após a distalização dos primeiros molares superiores permanentes. O espaço avaliado compreendeu da extremidade da tuberosidade maxilar à face distal do primeiro molar superior permanente. Para a análise estatística foi utilizado o teste t de Student, e na correlação entre espaço e angulação, o coeficiente de correlação de Pearson. Resultados e conclusão: O espaço correspondente entre a distal dos primeiros molares superiores permanentes e a extremidade da tuberosidade maxilar, na fase inicial e após a movimentação distal, não foi suficiente para a erupção dos segundos e terceiros molares superiores permanentes. As coroas, da fase inicial até o fim da movimentação distal, posicionaram-se mais para distal. Quanto à correlação das angulações das coroas dos segundos e terceiros molares superiores permanentes e o espaço para erupção, verificou-se que quanto maior a angulação distal das coroas menor o espaço oferecido para a erupção.
Objective: The objective of this study was to evaluate cephalometrically the space available for eruption of maxillary second and third molars in the region of the maxillary tuberosity after distalization of maxillary permanent first molars. Material and methods: The sample consisted of 38 right lateral cephalograms obtained from 19 Brazilian patients, of Caucasian and African descent, with average age of 9 years and 5 months. Cephalograms were taken before and after distalization of maxillary permanent first molars. The space from the end of the maxillary tuberosity to the distal aspect of the maxillary permanent first molar was evaluated. Student?s t test was applied for the statistical analysis, and the correlation between space and angulation was analyzed by the Pearson correlation coefficient. Results and conclusion: The corresponding space between the distal aspect of maxillary permanent first molars and the end of the maxillary tuberosity, before and after distalization, is not enough for eruption of the maxillary second and third molars. The crowns revealed distal angulation before and after distalization. The correlation of angulation of crowns of maxillary second and third molars and the space for eruption revealed that the greater the distal angulation of crowns, the smaller will be the space available for eruption.
ABSTRACT
AIM: To evaluate the Bolton ratios in Brazilians with natural, normal occlusions. METHODS: Thirty-five dental casts of Brazilian Caucasians with a natural, normal occlusion from the files of the Postgraduate Program in Orthodontics of the Methodist University of São Paulo were scanned in three dimensions. On the scanned images, the greatest mesiodistal distance of each tooth from right first molar to left first molar was measured with Geomagic Studio 5 software. The Bolton ratios were then calculated. RESULTS: The anterior ratio amounted to 78.66% (SD ± 2.72) and the total ratio to 91.58% (SD ± 2.20). CONCLUSION: The anterior, but not the overall, ratio was significantly different from the ratio suggested by Bolton.
Subject(s)
Dental Occlusion , Imaging, Three-Dimensional/methods , Models, Dental , Odontometry/methods , Adolescent , Bicuspid/anatomy & histology , Brazil , Child , Cuspid/anatomy & histology , Female , Humans , Incisor/anatomy & histology , Male , Molar/anatomy & histology , Software , White People , Young AdultABSTRACT
Este estudo avaliou as alterações produzidas nos arcos dentais superiores de pacientes submetidos à Expansão Rápida da Maxila Assistida Cirurgicamente (Ermac). A amostra utilizada foi composta por 54 modelos de gesso superiores de 18 pacientes, sendo seis do sexo masculino e 12 do sexo feminino, com média de idade de 23,3 anos. Para cada paciente foram preparados três modelos de gesso: inicial, antes do procedimentooperatório (T1), pós-expansão e contenção, três meses pós-cirurgia, (T2) e seis meses pós expansão (T3). O dispositivo expansor utilizado foi o disjuntor tipo Hyrax. O procedimentocirúrgico adotado foi a osteotomia lateral da maxila sem o envolvimento da lâmina pterigoide, osteotomia da espinha nasal à linha média dental, separação da sutura palatina mediana e separação do septo nasal. As medidas foram realizadas por meio da máquina de mediçãotridimensional, baseando-se nas alterações nos três planos. Concluiu-se que: 1. Houve um aumento estatisticamente significante nas distâncias transversais em todos os grupos de dentes (de incisivos centrais até segundos molares) de 1l para T2, demonstrando a efetividadedo tratamento. De T2 para T3 não houve diferença estatisticamente significante para nenhuma variável, indicando, assim, estabilidade após seis meses do término da Ermac; 2. Houve um aumento estatisticamente significante nas inclinações dos primeiros molaresdos lados direito e esquerdo, porém sem diferença para os primeiros pré-molares; 3. Houve um aumento estatisticamente significante na largura palatina entre T1 x T2 e T1 x T3; 4. Não foram observadas diferenças estatisticamente significantes na profundidade palatina nos intervalos analisados.
This study evaluated the alterations produced in the superior dental arcs of patients submitted to the Surgically Assisted Rapid Maxillary Expansion. The sample was composed of 54 orthodontic models of 18 patients (six males and 12 females). The average age was 23,3 years. For each patient three orthodontic models had been prepared: pre-operative stage (T1), three months after the operative procedure (T2), and six months of post-expansion period (T3). The appliance used in this study was the Hyrax type. The adopted surgical procedure was the lateral osteotomy of the maxilla, without involving the pterygoid pia te, osteotomy from the nasal spine to the maxillary dental midline, the midpalatal suture separation and the separation of nasal septum also. The measures had been carried, based on the alterations in the three plans. Conclusions: 1. There were statistically significant increase in the transversal distances in all the teeth groups (from central incisors to second molars) of T1 for T2, demonstrating the effectiveness of the treatment. The variables did not show statistically significant difference of T2 for T3, indicating stability after six months following the Sarme; 2. There were a statistically significant increase in the inclinations of the tirst molar of right and left sides, but there is no difference for first bicuspid; 3. There were an increase statistically significant in the palatine width between T1 x T2 and T1 x T3; and 4. Statistically significant differences were not observed in the palatine depth in the analyzed intervals.
Subject(s)
Humans , Male , Female , Young Adult , Dental Arch , Maxilla , Palatal Expansion Technique , Casts, Surgical , OrthopedicsABSTRACT
Objetivo: avaliar o mercado de trabalho do cirurgião-dentista, nas diferentes especialidades, na região norte do Brasil, além de avaliar a relação cirurgião-dentista/habitante e especialista/habitante, visando melhorar a compreensão dos rumos da profissão, direcionando a atuação profissional. Material e Métodos: foram coletados dados do Conselho Federal de Odontologia e do Instituto Brasileiro de Geografia e Estatística. Resultados: Acre, Amazonas, Amapá e Pará são os Estados que apresentam índices menores que o recomendado pela Organização Mundial de Saúde (1:1.500), diferente de Roraima, Rondônia e Tocantins. Esta região concentra 3,73% do total de cirurgiões-dentistas de todo o Brasil. Conclusões: o mercado de trabalho para os especialistas da região norte das áreas de Prótese Buco-Maxilo-Facial, Odontogeriatria, Patologia Bucal, Odontologia para Pacientes com Necessidades Especiais, Odontologia do Trabalho e da Estomatologia apresenta-se com melhor proporção de especialista/habitante, enquanto as áreas de Ortodontia e Endodontia apresentam maior proporção de especialista/habitante.
Objective: To evaluate the job market for dental surgeons, within their different specialties, in the North region of Brazil, in addition to evaluating dental surgeon/inhabitant and specialist/inhabitant ratios. The study aims to better understand the trends in this profession, and also suggests fields of professional activity. Materials and Methods: Data was collected from the Brazilian National Council of Odontology and the Brazilian National Institute of Geography and Statistics. Results: Acre, Amazonas, Amapá and Pará are the states within this region that have lower professional/inhabitant ratio levels than recommended by the World Health Organization (1:1,500), as opposed to the states of Roraima, Rondônia and Tocantins. This region concentrates 3.73% of all dental surgeons in Brazil. Conclusions: The job market for specialists in the North region in the fields of Bucomaxillofacial Prosthetics, Odontogeriatrics, Mouth Pathology, Dentistry for patients with special needs, Workplace Dentistry and Stomatology feature the best specialist/inhabitant ratio, while the fields of Orthodontics and Endodontics have higher specialist/inhabitant ratios.
Subject(s)
Job Market , Dentists/statistics & numerical data , Professional Practice , Brazil , Education, Dental , Specialties, DentalABSTRACT
Com a promulgação da Lei consumerista, os cirurgiões-dentistas passaram a estabelecer uma relação de consumo com seus pacientes, em que a Odontologia seria o serviço prestado e o paciente, o consumidor. Assim, objetivamos, com este trabalho,realizar uma revisão da literatura, com o intuito de estabelecer aos cirurgiões-dentistas, especialistas em Ortodontia, orientações legais para a elaboração de documentos que componham o prontuário do paciente, como o contrato de prestação de serviços odontológicos e o consentimento esclarecido. Um completo e organizado prontuário que minimiza as chances de possíveis litígios.É importante estabelecer com o paciente uma relação de confiança e amizade durante todo o tratamento, sempre informando e sendo transparente nas ações.
By the consumerist law promulgation, the dentists started a consumption relationship of witn their patients, in whicn the dental service would be provided to lhe patient, who would be the consuma Thus, based on the literature, this work aims to show thedentists, orthodontic-specialists, guidelines for lhe preparation oflegal documents that comprise the records ofthe patient, as the provision of dental services contract and the clarified consent. A complete and organized records minimizes the chances of possible litigation. It is important to establish with the patient, a relationship of trust and friendship throughout the treatment, always informing and being transparent in lhe actions.
Subject(s)
Contracts , Enacted Statutes , Liability, Legal , Orthodontics , Professional Practice , Dentist-Patient Relations , Medical RecordsABSTRACT
A colagem em Ortodontia com adesivos fotopolimerizáveis requer o uso de fotopolimerizadores cuja intensidade mínima de potência deve estar entre 300 mW/cm2 e 400 mW/cm2. Dentre as fontes de luz, os LEDs azuis têm sido utilizados nos novos equipamentos comercialmente disponíveis, mas há poucos estudos em relação a isto. Este estudo foi realizado para avaliar a densidade de potência em mW/cm2 de fotopolimerizadores a LED utilizados em consultórios ou clínicas odontológicas. Foram realizadas cinco medições com intervalos de 30s com um radiômetro LED digital (SDI, Austrália) da densidade de potência de 94 fotopolimerizadores com LEDs utilizados em consultórios e clínicas odontológicas. Após os registros em mW/cm2, realizou-se a estatística descritiva e a verificação da correlação do ano/potência do aparelho. O estudo concluiu que as médias das medições dos equipamentos em uso variaram de O (nenhum valor) a 2.100 mW/cm2. Verificou-se que 65% dos aparelhos tinha menos de 300 mW/cm2, portanto, inadequados para o uso; e três destes apresentaram valor zero de leitura no radiômetro digital. A análise de regressão exponencial mostrou haver uma correlação estatisticamente significante entre o ano do aparelho e sua potência. Obteve-se R2 = 0,16 e p
Bonding in Orthodontics with photoactivated adhesives needs the use of light-curing units (LCU) which minimal power intensity should be between 300 m W/cm2 and 400 m W/cm2. Among the light sources, blue LEDs have been used in new equipments, but there are few studies about it. Objective: This study was accomplished to evaluate the power density in m W/cm2 of LED LCUs, used in dental offices or clinics. Material and method: Five measurements of power density were accomplished with intervals of 30s with a digital LED radiometer (SDI, Australia) of 94 LED LCUs used in dental offices or clinics. After-measurements in m W/cm2, descriptive statistics was realized and the correlation of the year/intensity output of the equipment was verified. Measurement averages of the equipments in use varied from O (any value) to 2.100 m W/cm2. It was verified that 65% of the equipments had less than 300 mW/cm2 therefore inadequate for use. And three of these presented zero value reading. Exponential regression analysis showed a significant statistical correlation between equipments year and its intensity. It was obtained R2 = 0, 16 and p < 0,001. Polycarbonate polymer was the most used tip, present in 90% of the equipments with power intensity below of 300 m W/cm2.
Subject(s)
Braces , Composite Resins , Dental Bonding , Lasers, Semiconductor , Materials TestingABSTRACT
O aumento que ocorre na altura facial inferior (AFI) após expansão rápida da maxila (ERM) preocupa os pesquisadores. Este estudo avaliou a AFI após ERM com dois disjuntores palatinos (HaasG1 e HyraxG2). A amostra continha 93 telerradiografias em norma lateral, de 31 pacientes brasileiros, 15 do sexo feminino e 16 do masculino, e faixa etária entre 9 e 16 anos de idade (média=13a2m). Cada indivíduo foi radiografado pré-disjunção (T1), pós-disjunção (T2) e ao final do nivelamento (T3). A variável N-Me modificou de forma semelhante nos dois grupos; e a grandeza S-Go, não variou nos grupos, porém, seus valores aumentaram gradativamente nas fases T2 e T3. As grandezas PP-Me e PP-Go, mostraram, para G1 e G2, aumento da AFI anterior e posterior em T2 e T3. A AFI anterior e posterior aumentou estatisticamente com os dois aparelhos.
Clinicians have worried about the effect the rapid maxillay expansion (RME) might have on the lower face height (LFH). This study cephalometrically evaluated the LFH after RME, using two kinds of palatal expanders (HaasG1 and Hyrax nG2). The sample contained 93 lateral cephalograms from 31 brasilian patients, 15 females and 16 males; with a mean age of 13.2 years, and a range of 9-16 years. The cephalograms were taken before disjunction (T1), immediately after disjunction (T2) and after leveling (T3). G1 and G2 experienced similar changes in N-Me. S-Go didnt change, but both groups showed gradative increases of values in T2 and T3. G1 and G2 displayed increased anterior and posterior LFH (Me-PP and GOPP) in T2 and T3. After using both types of palatal expanders showed statistically significant increases in anterior and posterior LFH.