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1.
Dental press j. orthod. (Impr.) ; 29(1): e2423136, 2024. tab
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1534314

ABSTRACT

ABSTRACT Objective: The aim of this study was to evaluate the extent to which orthodontic treatment need is perceived by the patients and by the orthodontist, as well as the possible impacts on the OHRQoL (Oral Health-Related Quality of Life) over the course of conventional orthodontic treatment in adolescent patients. Methods: The sample consisted of 55 adolescents. The perception of patients and orthodontists relative to the malocclusion was evaluated by the IOTN (Index of Orthodontic Treatment Need). The OHRQoL was evaluated by the Child-OIDP (Child-Oral Impacts on Daily Performances) questionnaire before the conventional orthodontic appliance was bonded (T0); and at the following time intervals: after one week (T1), one month (T2), three months (T3), six months (T4), and after the end of orthodontic treatment (T5). Results: Adolescents who had large orthodontic treatment needs had a poor OHRQoL, according to their self-perception (p=0.003) and according to the orthodontist's perception (p<0.001), when compared with patients with small and moderate needs. There was statistically significant difference in the OHRQoL between the time intervals T0 and T1 (p=0.021), T2 and T3 (p<0.001), T3 and T4 (p=0.033), and T0 and T5 (p<0.002). At the end of treatment, all evaluated participants reported an improvement in OHRQoL. Conclusions: It was concluded that adolescents and orthodontists agreed with regard to the perception of orthodontic treatment need. In the first week and in the first month of orthodontic treatment, there was a negative impact on the OHRQoL. After three months, an improvement of OHRQoL was detected, which has progressed over time.


RESUMO Objetivo: O objetivo deste estudo foi avaliar o quanto a necessidade de tratamento ortodôntico é percebida pelos pacientes e pelo ortodontista, bem como os possíveis impactos na Qualidade de Vida Relacionada à Saúde Bucal (QVRSB) ao longo do tratamento ortodôntico convencional em pacientes adolescentes. Métodos: A amostra foi composta por 55 adolescentes. A percepção dos pacientes e ortodontistas em relação à má oclusão foi avaliada pelo Índice de Necessidade de Tratamento Ortodôntico (IOTN). A QVRSB foi avaliada pelo questionário Child-OIDP (Child-Oral Impacts on Daily Performances) antes da colagem do aparelho ortodôntico convencional (T0); e nos seguintes intervalos de tempo: após uma semana (T1), um mês (T2), três meses (T3), seis meses (T4) e após o término do tratamento ortodôntico (T5). Resultados: Adolescentes que apresentavam grandes necessidades de tratamento ortodôntico apresentaram baixa QVRSB, segundo sua autopercepção (p=0,003) e segundo a percepção do ortodontista (p<0,001), quando comparados com pacientes com necessidades pequenas e moderadas . Houve diferença estatisticamente significativa na QVRSB entre os intervalos de tempo T0 e T1 (p=0,021), T2 e T3 (p<0,001), T3 e T4 (p=0,033) e T0 e T 5 (p<0,00 2 ). Ao final do tratamento, todos os participantes avaliados relataram melhora na QVRSB. Conclusões: Concluiu-se que adolescentes e ortodontistas concordaram quanto à percepção da necessidade de tratamento ortodôntico. Na primeira semana e no primeiro mês de tratamento ortodôntico, houve impacto negativo na QVRSB. Após três meses, foi detectada uma melhora na QVRSB, que progrediu ao longo do tempo.

2.
Rev. Fac. Odontol. Porto Alegre ; 64(1): e130007, dez 2023.
Article in English | LILACS-Express | LILACS | ID: biblio-1526315

ABSTRACT

Objetivo: Este estudo teve como objetivo avaliar a elasticidade de elásticos ortodônticos após desinfecção e esterilização com ácido peracético 0,2%. Materiais e métodos: Neste estudo piloto in vitro, elásticos ortodônticos Morelli® e American Orthodontics™ nas cores cinza e cristal foram divididas em três grupos experimentais: Grupo 1, imerso em água destilada por 72 horas, Grupo 2, imerso em peracético 0,2% por 10 min (para desinfecção) e Grupo 3, imerso em ácido peracético 0,2% por 30 min (para esterilização). Após a imersão, os valores de resistência à tração dos elásticos foram analisados em uma máquina de ensaios universal (EMIC DL-1000) para avaliar a resistência, em Newtons, necessária para a ruptura dos mesmos. A normalidade dos dados foi avaliada pelo teste de Shapiro-Wilk e os dados dos diferentes grupos experimentais foram comparados pelo teste ANOVA. Resultados: Para ambas as marcas, não houve diferença estatisticamente significativa entre os grupos experimentais quanto à resistência à tração. Discussão: O estudo apresentou um método alternativo para a desinfecção e esterilização de materiais termossensíveis. Conclusão: Assim, podemos concluir que a desinfecção e esterilização dos elásticos ortodônticos com ácido peracético 0,2% não alterou seu módulo de elasticidade.


Aim: This study aimed to evaluate the elasticity of orthodontic elastics after disinfection and sterilization with 0.2% peracetic acid. Materials and methods: In this in vitro pilot study, Morelli® and American Orthodontics™ elastic bands in gray and crystal colors were divided into three experimental groups: Group 1, immersed in distilled water for 72 hours, Group 2, immersed in 0.2% peracetic acid for 10 min (for disinfection) and Group 3, immersed in 0.2% peracetic acid for 30 min (for sterilization). After immersion, the tensile strength values of the elastics were analyzed in a universal test machine (EMIC DL-1000) to evaluate the strength, in Newtons, necessary for their rupture. Normality of the data was assessed using the Shapiro-Wilk test, and data from the different experimental groups were compared using the ANOVA test. Results: For both brands, there was no statistically significant difference between the experimental groups regarding tensile strength. Discussion: This study presented an alternative method for the disinfection and sterilization of thermo-sensitive materials. Conclusion: Thus, it can be concluded that the sterilization of orthodontic elastics with 0.2% peracetic acid did not change their modulus of elasticity.

3.
Dental press j. orthod. (Impr.) ; 28(2): e2321167, 2023. tab, graf
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1439985

ABSTRACT

ABSTRACT Objective: To evaluate the pulp chamber temperature rise (PCTR) in light-cure bonding of brackets with and without primer, in intact and restored mandibular central incisors (M1), maxillary first premolars (Mx4), and mandibular third molars (M8). Material and Methods: Ninety human teeth were included: M1 (n=30), Mx4 (n=30), and M8 (n=30). Light-cure bonding of brackets was performed in intact (n=60) and restored (n=30) teeth, with primer (n=60) or without (n=30) primer. PCTR was defined as the difference between initial (T0) and peak temperatures (T1), recorded with a thermocouple during light-cure bonding. Differences on PCTR between bonding techniques (primer vs. no primer), teeth types (M1 vs. Mx4 vs. M8), and teeth condition (intact vs. restored) were estimated by ANCOVA, with α=5%. Results: PCTR was significantly higher with the use of primer (2.05 ± 0.08oC) than without primer (1.65 ± 0.14oC) (p=0.02), and in M1 (2.23 ± 0.22oC) compared to Mx4 (1.56 ± 0.14oC) (p<0.01). There was no difference in the PCTR in M8 (1.77 ± 0.28oC) compared to M1 or Mx4 (p>0.05), and no difference between intact (1.78 ± 0.14oC) and restored (1.92 ± 0.08oC) teeth (p=0.38). There was no influence of dentin enamel thickness in the PCTR (p=0.19). Conclusion: PCTR was higher in light-cure bonding of brackets with primer, especially in M1. Light-cure bonding seems less invasive without primer.


RESUMO Objetivo: Comparar o aumento na temperatura da câmara pulpar (ATCP) na colagem de braquetes com fotoativação usando ou não primer, em dentes hígidos versus dentes restaurados, em incisivos centrais inferiores (ICI), primeiros pré-molares superiores (1PMS) e terceiros molares inferiores (3MI). Métodos: Foram incluídos noventa dentes humanos: ICI (n=30), 1PMS (n=30) e 3MI (n=30). A colagem de braquetes com fotoativação foi realizada em dentes hígidos (n=60) ou dentes restaurados (n=30), com primer (n=60) ou sem (n=30) primer. O ATCP foi definido como a diferença entre as temperaturas inicial (T0) e máxima (T1) registradas com um termômetro durante a colagem com fotoativação. As diferenças no ATCP entre as técnicas de colagem (com primer vs. sem primer), diferentes dentes (ICIvs.1PMSvs.3MI) e condição dos dentes (hígidos vs. restaurados) foram estimadas por ANCOVA, com α=5%. Resultados: O ATCP foi significativamente maior com o uso de primer (2,05 ± 0,08oC) do que sem primer (1,65 ± 0,14oC) (p=0,02), e no ICI (2,23 ± 0,22oC) do que no 1PMS (1,56 ± 0,14oC) (p<0,01). Não houve diferença no ATCP do 3MI (1,77 ± 0,28oC) em comparação com ICI ou 1PMS (p>0,05), e não houve diferença entre dentes hígidos (1,78 ± 0,14oC) e restaurados (1,92 ± 0,08oC) (p=0,38). Não houve influência da espessura da dentina e do esmalte no ATCP (p=0,19). Conclusão: O ATCP foi maior na colagem de braquetes com fotoativação usando primer, principalmente no ICI. A colagem com fotoativação parece ser menos invasiva sem primer.

4.
Braz. oral res. (Online) ; 37: e097, 2023. tab
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1520526

ABSTRACT

Abstract The aim of this study was to understand the influence of orthosurgical treatment on oral health-related quality of life (OHRQoL) in patients with Class II and III skeletal malocclusion by conducting a mixed method case series study. Nineteen patients submitted to orthosurgical treatment in a private practice in Brazil were included in the sample. Data were collected retrospectively and interviews were held from March 2020 to July 2021. Patients answered to the Oral Health Impact Profile (OHIP-14) in the first part of the interview and subsequently answered the qualitative questions. The overall mean of OHIP-14 after treatment was 4.21 (SD 4.68). The qualitative data were analyzed according to thematic analysis and four themes emerged from the interviews: a) concept of quality of life, b) pre-treatment life, c) post-treatment life, and d) positive and negative aspects of treatment. Quality of Life was reported by the patients as the absence of feeling pain, having emotional and physical health, having a satisfactory esthetic appearance and self-esteem. Before treatment, most Class II patients used to complain about breathing and sleeping problems, while Class III patients complained more intensely about esthetics. Pain was a common problem reported by both Class II and Class III patients. In general, improvement was perceived in self-esteem, esthetics, function and pain. Complaints about negative aspects of the treatment were restricted to the postoperative period. The orthosurgical treatment was important for improving the OHRQoL of patients in terms of esthetic, functional and psychosocial aspects.

5.
Braz. j. oral sci ; 22: e237397, Jan.-Dec. 2023. tab
Article in English | LILACS, BBO | ID: biblio-1413361

ABSTRACT

Aim: This study aimed to assess the prevalence of temporomandibular disorders (TMD) and psychosocial comorbidities in undergraduate dental students in a southern Brazilian university, during the COVID-19 pandemic. Also, it aimed to verify the association between psychosocial factors and TMD. Methods: Fonseca Anamnestic Index, Depression Anxiety Stress Scale (DASS-21), a socioeconomic questionnaire, and questions about academic performance and social distancing were applied. Poisson regression analysis was used to assess the association of predictive variables with TMD. Results: The prevalence of TMD was found to be 82.4%, and more than half of the students had some degree of stress, anxiety, and depression. Students who had symptoms of stress (RR 1.11; 95% CI 1.04-1.19), anxiety (RR 1.19; 95% CI 1.12-1.27) and reported academic performance worsening (RR 1.12; 95% CI 1.07-1.19) had higher TMD scores. Conclusion: The findings suggest that TMD was highly prevalent among dental students at a federal university in southern Brazil during the pandemic, being associated with high levels of stress, anxiety, poor academic performance, and greater social distancing


Subject(s)
Humans , Male , Female , Adult , Anxiety , Students, Dental , Temporomandibular Joint Disorders/epidemiology , Depression , COVID-19
6.
Dental press j. orthod. (Impr.) ; 27(1): e222098, 2022. tab, graf
Article in English | LILACS, BBO | ID: biblio-1364784

ABSTRACT

ABSTRACT Introduction: Orthodontic mini-implants (MI) are a reliable alternative to provide temporary orthodontic anchorage. Prior to miniscrew insertion, the best approach would be to evaluate each possible insertion site and measure the cortical bone thickness, and verify whether it would provide adequate primary stability. Objective: This study aimed to evaluate the difference in cortical bone thickness in areas of mini-implants insertion in patients of different ages, by means of cone beam computed tomography (CBCT). Methods: The sample of this retrospective study was composed of 123 CBCT scans, which were used to measure cortical bone thickness in the buccal and palatal inter-radicular space in the mesial region of the first permanent molars. These measures were compared by using the Student's t-test, ANOVA/Tukey tests, and Linear regression between male and female subjects, from 12 to 30 years old. Results: No significant difference was found in cortical bone thickness between sex, race and sagittal facial patterns. Significantly higher measurement values were observed in patients older than 12 years of age at all sites evaluated. The coefficient β at the adjusted linear regression analysis showed that at each increment in age, mean cortical thickness values increased by 0.06mm in the mandible, 0.03mm in the buccal region and 0.02mm in the palatal region of the maxilla. Conclusions: The increase in cortical bone thickness was positively associated with age; that is, the more advanced the patient's age was, the less chance there was of failure due to primary stability.


RESUMO Introdução: Os mini-implantes ortodônticos (MI) são uma alternativa confiável para fornecer ancoragem esquelética temporária. Antes da inserção do mini-implante, a melhor abordagem seria avaliar cada local de inserção possível, medir a espessura do osso cortical e verificar se proporcionaria uma adequada estabilidade primária. Objetivo: O presente estudo teve como objetivo avaliar a diferença na espessura do osso cortical em áreas de inserção dos mini-implantes em pacientes de diferentes idades, por meio da tomografia computadorizada de feixe cônico. Métodos: A amostra desse estudo retrospectivo foi composta por 123 tomografias computadorizadas de feixe cônico, que foram utilizadas para medir a espessura do osso cortical nos espaços inter-radiculares vestibular e palatino na região mesial dos primeiros molares permanentes. Essas medidas foram comparadas por meio dos testes t de Student, ANOVA/Tukey e regressão linear entre os sexos masculino e feminino, de 12 a 30 anos. Resultados: Não houve diferença estatisticamente significativa na espessura cortical, quando comparados sexo, cor da pele e padrão facial sagital. Foram verificadas medidas significativamente maiores em pacientes com idade superior a 12 anos em todos os sítios avaliados. O coeficiente β da análise de regressão linear ajustada mostrou que, a cada incremento da idade, os valores médios da espessura cortical aumentaram 0,06 mm na mandíbula, 0,03 mm na região vestibular e 0,02 mm na região palatina da maxila. Conclusão: O aumento da espessura do osso cortical teve associação positiva com a idade, ou seja, quanto mais avançada a idade do paciente, menor a chance de falha, devido à estabilidade primária.


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Young Adult , Dental Implants , Orthodontic Anchorage Procedures/methods , Retrospective Studies , Cone-Beam Computed Tomography/methods , Cortical Bone/diagnostic imaging , Mandible/surgery , Mandible/diagnostic imaging , Maxilla/diagnostic imaging
7.
CoDAS ; 34(1): e20200318, 2022. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1345823

ABSTRACT

ABSTRACT Purpose To evaluate the agreement among instruments of the quantitative evaluation of hard palate. Methods This cross-sectional study was performed with a sample of 30 children aged 6 to 11 from Santa Maria, Southern Brazil. The instruments for palate measurements evaluated were: digital caliper, used directly in the oral cavity and in plaster casts, Korkhaus tridimensional bow, used directly in the oral cavity and in plaster casts, and Dolphin Imaging Software used for measurements in cone-beam computed tomography (CBCT). The agreement among different instruments was evaluated using the Intraclass Correlation Coefficient (ICC). Results The means of all transversal dimensions obtained by cone-beam computed tomography were lower than those of the other instruments - the agreement values in the width between the canines and in the width between the first molars were lower when comparing the cone-beam computed tomography and the other instruments. In the width between the first and second premolars, all comparisons showed acceptable agreement values. Good concordance values were obtained when comparing the palate depth at the second premolar region when using a bow divider inside the oral cavity and in the cast. Conclusion Most instruments presented satisfactory agreement in the measurements related to the transverse plane of the hard palate. However, when the vertical plane was evaluated, only the bow divider applied to both cast and oral cavity presented ideal agreement.


RESUMO Objetivo Avaliar a concordância entre instrumentos de avaliação quantitativa do palato duro. Método Este estudo transversal foi realizado com uma amostra de 30 crianças de 6 a 11 anos de Santa Maria, sul do Brasil. Os instrumentos de medidas do palato avaliados foram: paquímetro digital, utilizado diretamente na cavidade oral e em modelos de gesso, arco tridimensional Korkhaus, usado diretamente na cavidade oral e em modelos de gesso, e Dolphin Imaging Software utilizado para medições em tomografia computadorizada de feixe cônico (CBCT). A concordância entre os diferentes instrumentos foi avaliada por meio do Coeficiente de Correlação Intraclasse (ICC). Resultados As médias de todas as dimensões transversais obtidas pela tomografia computadorizada de feixe cônico foram menores do que as dos outros instrumentos - os valores de concordância na largura entre os caninos e na largura entre os primeiros molares foram baixos na comparação entre a tomografia computadorizada de feixe cônico e os demais instrumentos. Na largura entre o primeiro e o segundo pré-molar, todas as comparações apresentaram valores de concordância aceitáveis. Valores de concordância aceitáveis também foram obtidos ao comparar a profundidade do palato na região do segundo pré-molar com o uso de um divisor de arco dentro da cavidade oral e no gesso. Conclusão A maioria dos instrumentos apresentou concordância satisfatória nas medidas relacionadas ao plano transverso do palato duro. Porém, quando avaliado o plano vertical, apenas o divisor de arco aplicado tanto no gesso quanto na cavidade oral apresentou concordância ideal.

8.
CoDAS ; 34(1): e20200291, 2022. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1345827

ABSTRACT

ABSTRACT Purpose To evaluate the association among dimensions of the hard palate according to the sexes, skin color, and periods of the mixed dentition and present reference parameters of normality for this stage of development. Methods This cross-sectional study evaluated a representative sample of children between the ages of 7 and 13 years in Santa Maria, southern Brazil. The outcomes of the study were the dimensions of the palate: width measurements and depth. Sociodemographic characteristics and related oral measures were also assessed. Adjusted linear regression model were used to evaluate the effect of the predictor's variables on the dimensions of the hard palate in millimeters. The reference standards for the hard palate normality were presented in mean, standard deviation, and 95% confidence interval. Results A total of 569 children were evaluated. The hard palate dimensions were larger in the male sex and smaller in the first transitional period of mixed dentition. Skin color had an influence on the hard palate width at the level of the premolars, and the width measurements were smaller in white individuals. Posterior cross bite, Angle Class II and III malocclusions and non-nutritional sucking habits caused reduction in the hard palate width measurements. Conclusion Different dimensions of the hard palate are influenced by demographic variables such as sex, skin color, and mixed dentition period. Children of the female sex, white-skinned and in the first transition period of mixed dentition had smaller dimensions of the hard palate. Establishing normality reference standards in measurements of the palates guides the clinical practice.


RESUMO Objetivo Avaliar a associação entre as dimensões do palato duro de acordo com os sexos, cor da pele e períodos da dentição mista e apresentar parâmetros de normalidade de referência para esta fase de desenvolvimento. Método Este estudo transversal avaliou uma amostra representativa de crianças com idade entre 7 e 13 anos em Santa Maria, sul do Brasil. Os desfechos do estudo foram as dimensões do palato: medidas de largura e profundidade. Características sociodemográficas e medidas orais relacionadas também foram avaliadas. Modelos de regressão linear ajustados foram utilizados para avaliar o efeito das variáveis preditoras sobre as dimensões do palato duro em milímetros. Os padrões de referência para a normalidade do palato duro foram apresentados em média, desvio padrão e intervalo de confiança de 95%. Resultados Foram avaliadas 569 crianças. As dimensões do palato duro foram maiores no sexo masculino e menores no primeiro período de transição da dentição mista. A cor da pele influenciou a largura do palato duro ao nível dos pré-molares, sendo as medidas de largura menores nos brancos. Mordida cruzada posterior, más oclusões de Classe II e III de Angle e hábitos de sucção não nutricionais causaram redução nas medidas da largura do palato duro. Conclusão As diferentes dimensões do palato duro são influenciadas por variáveis demográficas como o sexo, cor da pele e período de dentição mista. Crianças do sexo feminino, de cor de pele branca e no primeiro período de transição de dentição mista apresentaram menores dimensões do palato duro. O estabelecimento de padrões de referência de normalidade nas medidas do palato orienta a prática clínica.

9.
Dental press j. orthod. (Impr.) ; 26(2): e211955, 2021. tab
Article in English | LILACS, BBO | ID: biblio-1249701

ABSTRACT

ABSTRACT Objective: To assess the color of different orthodontic resin bonding agents exposed to three antiseptic mouthrinses for a prolonged time interval (10-year aging simulation). Methods: 160 specimens were distributed into four groups, according to the orthodontic resin bond agent (Concise, Transbond XT, Transbond Plus Color Change, and Natural Ortho). Each group was exposed to different antiseptic mouthrinses: alcohol-based (Listerine®), alcohol-free (Oral-B®), chlorhexidine (Periogard®) and distilled water as the control. Specimens were submitted to two cycles of staining and artificial aging. Color was evaluated by means of a digital spectrophotometer at the beginning of the experiment and after every cycle. The system used to assess color changes was the CIE L*a*b*. Data was analyzed using the ANOVA and Tukey post-hoc test. Results: After simulation of 10 years of aging, Transbond XT and Natural Ortho composites presented no statistically significant differences in ∆E when exposed to different mouthrinses. The Concise composite specimens exposed to alcohol-free mouthrinse presented a significant difference when compared with specimens from the same group exposed to other antiseptic mouthrinses. Transbond Plus Color Change specimens exposed to chlorhexidine mouthrinse and to alcohol-containing mouthrinse presented a significant difference when compared with the specimens from the group exposed to water and alcohol-free antiseptic. Conclusion: All orthodontic resin bonding agents tested presented clinically perceptible color changes when exposed to at least one of the mouthrinses, except for the Natural Ortho composite. The Concise composite exposed to the alcohol-free solution was the resin that presented the highest color change values.


RESUMO Objetivo: Avaliar a cor de diferentes resinas ortodônticas expostas a três enxaguantes bucais, por um intervalo de tempo prolongado (simulação de 10 anos de envelhecimento). Métodos: 160 espécimes foram distribuídos em quatro grupos, de acordo com a resina de colagem ortodôntica (Concise, Transbond XT, Transbond Plus Color Change e Natural Ortho). Cada grupo foi exposto a diferentes tipos de enxaguantes bucais: à base de álcool (Listerine®), isento de álcool (Oral-B®), clorexidina (Periogard®) ou água destilada, como controle. Os espécimes foram submetidos a dois ciclos de manchamento e envelhecimento artificial. A cor foi avaliada por meio de um espectrofotômetro digital no início do experimento e após cada ciclo. O sistema utilizado para avaliar as alterações de cor foi o CIE L*a*b*. Os dados foram analisados utilizando-se o teste ANOVA e o teste post-hoc de Tukey. Resultados: Após a simulação de 10 anos de envelhecimento, as resinas Transbond XT e Natural Ortho não apresentaram diferenças estatisticamente significativas no ∆E, quando expostas a diferentes enxaguantes bucais. Os espécimes do grupo Concise expostos ao enxaguante bucal sem álcool apresentaram diferença significativa quando comparados aos espécimes do mesmo grupo expostos aos outros enxaguantes bucais. Os espécimes do grupo Transbond Plus Color Change expostos à clorexidina e ao enxaguante bucal à base de álcool apresentaram diferença significativa quando comparados aos espécimes dos grupos expostos à água e ao enxaguante bucal sem álcool. Conclusão: Todas as resinas ortodônticas avaliadas apresentaram alterações de cor clinicamente perceptíveis quando expostas a pelo menos um dos enxaguantes bucais, com exceção da resina ortodôntica Natural Ortho. A resina Concise exposta à solução isenta de álcool foi a que apresentou os maiores valores de alteração de cor.


Subject(s)
Chlorhexidine , Orthodontic Brackets , Composite Resins , Anti-Infective Agents, Local , Materials Testing , Resin Cements , Mouthwashes
10.
J. appl. oral sci ; 29: e20201005, 2021. tab, graf
Article in English | LILACS | ID: biblio-1286918

ABSTRACT

Abstract Background Malocclusions are highly prevalent in childhood and adolescence, being considered a public health problem worldwide, in addition to be considered an important predictor in the tongue position and speech disorders. Objective Evaluate the association of malocclusions with tongue position and speech distortion in mixed-dentition schoolchildren from the south of Brazil. Methodology This cross-sectional study was performed using a database of an epidemiological survey realized in the southern of Brazil, in 2015, for evaluating the dental and myofunctional condition of the mixed-dentition from 7-13 years' schoolchildren. The outcome variables were tongue position and speech distortion, evaluated by a trained and calibrated examiner. Characteristics regarding sociodemographic and oral health measures (Angle's classification of the malocclusion, overjet, overbite, posterior crossbite and respiratory mode) were also assessed. Poisson regression models with adjusted robust variance were used to evaluate the association among predictors variables in the outcomes. Results are presented as prevalence ratio (PR) and 95% confidence interval (95% CI). Results A total of 547 children were evaluated. Schoolchildren who presented anterior open bite (PR 2.36 95%CI 1.59-3.49) and having oral/oral-nasal breathing (RP 2.51 95%CI 1.70-3.71) are more likely to have altered position of the tongue. Both deep bite and being male represent protection factors for the abnormal tongue position. Regarding speech distortion, deep overbite presents a protective relationship to speech distortion (PR 0.41; 95%CI 0.24-0.71), whereas schoolchildren with posterior crossbite were more likely to present this problem (PR 1.77; 95%CI 1.09-2.88). Conclusion Anterior open bite and posterior crossbite were the malocclusions related to speech distortion and/or altered tongue position. Oral/oral-nasal breathing was also related to myofunctional changes. Deep bite malocclusion was a protective factor for both speech problems and altered tongue position when compared to a normal overbite.


Subject(s)
Humans , Male , Child , Adolescent , Dentition , Malocclusion/epidemiology , Speech , Speech Disorders , Tongue , Prevalence , Cross-Sectional Studies
11.
Dental press j. orthod. (Impr.) ; 23(6): 73-79, Nov.-Dec. 2018. tab, graf
Article in English | LILACS | ID: biblio-975026

ABSTRACT

Abstract Objective: The aim of this study was to evaluate a flapless surgical technique as an alternative to traditional alveolar corticotomy used to accelerate orthodontic tooth movement (OTM). Methods: To induce OTM in Wistar rats, 40 cN of orthodontic force were applied to the maxillary left first molars. Forty rats were distributed into control groups (CG1, CG3, CG7 and CG14) and experimental groups (n= 5), in which alveolar perforations were made using a spear-shaped guide bur (EG1, EG3, EG7, EG14). Euthanasia dates were set at 1, 3, 7 and 14 days, respectively, after tooth movement began. The amount of OTM was measured with a caliper, and osteoclasts present in the periodontal ligament of the mesial root of the moved tooth were counted by means of histological evaluation (tartrate-resistant acid phosphatase staining, TRAP). Results: Although there was no difference in the amount of OTM within subgroups of corresponding experimental periods (p> 0.05), when EG14 and CG14 were compared, a larger number of osteoclasts was counted in the experimental group (p< 0.00). Conclusion: The authors concluded that flapless cortical alveolar perforations led to more intense osteoclastic activity on the fourteenth day; nevertheless, no evidence of accelerated OTM could be noted.


Resumo Objetivo: o objetivo do presente estudo foi avaliar a técnica cirúrgica sem retalho como alternativa à tradicional corticotomia alveolar utilizada para acelerar o movimento dentário experimental. Métodos: para induzir a movimentação dentária experimental em ratos Wistar, foram aplicados 40 cN de força ortodôntica aos primeiros molares superiores esquerdos. Quarenta ratos foram distribuídos nos grupos (n = 5) controles (GC1, GC3, GC7 e GC14) e experimentais (GE1, GE3, GE7, GE14), nos quais foram realizadas perfurações alveolares com uma ponta lança. As datas de eutanásia foram estabelecidas em 1, 3, 7 e 14 dias, respectivamente, após o início do movimento dentário. A quantidade de deslocamento dentário foi medida com um paquímetro e os osteoclastos presentes no ligamento periodontal da raiz mesial do dente movimentado foram contados por meio de avaliação histológica (coloração por fosfatase ácida resistente ao tartarato, TRAP). Resultados: embora não tenha havido diferença na quantidade de deslocamento dentário dentro dos subgrupos dos períodos experimentais correspondentes (p> 0,05), quando GC14 e GE14 foram comparados, um número maior de osteoclastos foi contado no grupo experimental (p< 0,00). Conclusão: os autores concluíram que as perfurações alveolares corticais sem retalho levaram a uma atividade osteoclástica mais intensa no décimo quarto dia; entretanto, nenhuma evidência de movimento dentário acelerado pôde ser notada.


Subject(s)
Animals , Male , Rats , Osteoclasts/pathology , Tooth Movement Techniques/adverse effects , Tooth Movement Techniques/methods , Alveolar Process/pathology , Orthodontic Appliances , Periodontal Ligament/pathology , Time Factors , Tooth Root/pathology , Bone Resorption , Bone Remodeling , Rats, Wistar , Models, Animal , Dental Stress Analysis , Maxilla , Molar
12.
CoDAS ; 30(4): e20170071, 2018. tab, graf
Article in English | LILACS | ID: biblio-890844

ABSTRACT

ABSTRACT Purpose : This study was conducted to identify variables associated with mouth breathing diagnosis in children, based on multidisciplinary domains. Methods 119 children, six to 12 years old, underwent anamnesis, speech therapy (orofacial structures and stomatognathic functions), otorhinolaryngologic (OTRL) with clinical and endoscopic examinations, dental (occlusion) and physiotherapy (body posture and nasal patency) assessments. Nasal patency was evaluated using Peak Nasal Inspiratory Flow (PNIF) and the Nasal Obstruction Symptom Evaluation (NOSE) scale. A multiple logistic regression was performed considering breathing mode as the dependent variable and the co-variables from each multidisciplinary assessment as associated variables. Results Association with MB diagnosis was found in each professional domain with: nasal obstruction report (Odds ratio - OR=5.55), time of pacifier use (OR=1.25), convex facial type (OR=3.78), obtuse nasal angle (OR=4.30), half-open or open lip posture (OR=4.13), tongue position on the mouth floor (OR=5.88), reduced hard palate width (OR=2.99), unexpected contraction during mastication (OR=2.97), obstructive pharyngeal tonsils (OR=8.37), Angle Class II malocclusion (OR=10.85) and regular gingival maintenance (OR=2.89). Conclusion We concluded that a multidisciplinary diagnosis is important, given that each evaluation domain, including OTRL, dental and speech therapy, presented variables associated with MB diagnosis. Body posture and nasal patency variables were not associated with MB.


RESUMO Objetivo Este estudo foi conduzido para identificar as variáveis associadas ao diagnóstico de respiração oral em crianças, baseado nos domínios multidisciplinares. Método Cento e dezenove crianças, de seis a 12 anos, realizaram uma avaliação abrangente composta por uma anamnese e exames fonoaudiológico (estruturas orofaciais e funções estomatognáticas), otorrinolaringológico (avaliação clínica e endoscópica), odontológico (conservação oral e oclusão) e fisioterapêutico (postura corporal e permeabilidade nasal). A permeabilidade nasal foi aferida utilizando-se o Pico de Fluxo Inspiratório Nasal (PFIN) e a escala NOSE (Nasal Obstruction Symptom Evaluation). Foi realizada uma regressão logística múltipla, considerando o modo respiratório como variável dependente e as covariáveis de cada avaliação multidisciplinar como variáveis associadas. Resultados Foi encontrada uma associação do diagnóstico de respiração oral com variáveis de cada domínio profissional: relato de obstrução nasal (Odds ratio - OR=5,55), tempo de uso de chupeta (OR=1,25), tipo facial convexo (OR=3,78), ângulo nasolabial obtuso (OR=4,30), postura de lábios entreabertos e abertos (OR=4,13), postura de língua no assoalho oral (OR=5,88), largura do palato duro reduzida (OR=2,99), contrações inesperadas durante a mastigação (OR=2,97), tonsilas faríngeas obstrutivas (OR=8,37), má oclusão classe II de Angle (OR=10,85) e estado gengival regular (OR=2,89). Conclusão Concluiu-se que o diagnóstico multidisciplinar é importante, uma vez que as avaliações dos domínios fonoaudiológico, otorrinolaringológico e odontológico obtiveram variáveis associadas ao diagnóstico de respiração oral. As variáveis relacionadas à postura corporal e permeabilidade nasal não foram associadas ao diagnóstico de respiração oral.


Subject(s)
Humans , Male , Female , Child , Mouth Breathing/diagnosis , Nasal Obstruction/complications , Nasal Obstruction/diagnosis , Rhinitis , Anthropometry , Cross-Sectional Studies , Regression Analysis , Mouth Breathing/etiology , Mouth Breathing/physiopathology
13.
CoDAS ; 30(5): e20170216, 2018. tab, graf
Article in Portuguese | LILACS | ID: biblio-984222

ABSTRACT

RESUMO Objetivo Analisar a influência do gênero e da idade nas dimensões do palato duro, bem como verificar os parâmetros de referência disponíveis na literatura. Estratégia de pesquisa Dois examinadores realizaram a pesquisa de forma independente nas bases de dados Cochrane Library, PubMed-Medline e Web of Knowledge utilizando os descritores de acordo com as regras de sintaxe de cada banco de dados. Critérios de seleção Estudos em humanos observacionais ou experimentais, que avaliaram as dimensões do palato duro ou do arco dentário maxilar com pelo menos uma mensuração no plano transversal, vertical ou sagital em oclusões normais ou más oclusões classe I e que realizaram comparações das dimensões entre os gêneros e/ou idades. Análise de dados Análise descritiva, seguindo subdivisões: delineamento, amostra, instrumentos de avaliação, medidas em milímetros e análise estatística. A qualidade dos estudos incluídos foi verificada através da escala "Newcastle - Ottawa Quality". Resultados Foram selecionados 18 estudos. Destes, 11 apresentaram resultados das dimensões do palato duro ou do arco dentário maxilar conforme o gênero, seis em idade e gênero e um somente em idade. Conclusão As medidas foram maiores no gênero masculino e houve um aumento progressivo nas dimensões do nascimento até o período de dentição permanente.


ABSTRACT Purpose Analyze the influence of gender and age on hard palate dimensions and verify the reference parameters available in the literature. Research strategies Two reviewers independently performed a search at the Cochrane Library, PubMed-Medline and Web of Knowledge databases using descriptors according to the syntax rules of each database. Selection criteria Observational or experimental human studies evaluating the dimensions of the hard palate or maxillary dental arch, with at least one transverse, vertical or sagittal plane measurement, in normal occlusions or class I malocclusions, and comparisons of the dimensions between genders and/or ages. Data analysis Descriptive analysis with the following subdivisions: design, sample, evaluation instruments, measurements in millimeters, and statistical analysis. Quality of the included studies was verified by the Newcastle - Ottawa Quality scale. Results Eighteen studies were selected and 11 presented results for hard palate or maxillary dental arch dimensions according to gender, six in age and gender and one in age only. Conclusion The dimensions were larger in males and progressive increase in the measurements was observed from birth to the permanent dentition period.


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Adult , Young Adult , Sex Factors , Age Factors , Palate, Hard/anatomy & histology , Dental Arch/anatomy & histology , Palate, Hard/growth & development , Dental Arch/growth & development , Maxilla/anatomy & histology , Maxilla/growth & development , Middle Aged
14.
Dental press j. orthod. (Impr.) ; 22(6): 99-109, Nov.-Dec. 2017. graf
Article in English | LILACS | ID: biblio-891104

ABSTRACT

ABSTRACT Introduction: In dental practice, low-level laser therapy (LLLT) and high-intensity laser therapy (HILT) are mainly used for dental surgery and biostimulation therapy. Within the Orthodontic specialty, while LLLT has been widely used to treat pain associated with orthodontic movement, accelerate bone regeneration after rapid maxillary expansion, and enhance orthodontic tooth movement, HILT, in turn, has been seen as an alternative for addressing soft tissue complications associated to orthodontic treatment. Objective: The aim of this study is to discuss HILT applications in orthodontic treatment. Methods: This study describes the use of HILT in surgical treatments such as gingivectomy, ulotomy, ulectomy, fiberotomy, labial and lingual frenectomies, as well as hard tissue and other dental restorative materials applications. Conclusion: Despite the many applications for lasers in Orthodontics, they are still underused by Brazilian practitioners. However, it is quite likely that this demand will increase over the next years - following the trend in the USA, where laser therapies are more widely used.


Subject(s)
Humans , Animals , Orthodontics/instrumentation , Orthodontics/methods , Laser Therapy/instrumentation , Laser Therapy/methods , Surgery, Oral/instrumentation , Surgery, Oral/methods , Tooth Movement Techniques/instrumentation , Tooth Movement Techniques/methods , Low-Level Light Therapy/instrumentation , Low-Level Light Therapy/methods , Lasers, Semiconductor/therapeutic use , Gingivectomy/instrumentation
15.
Rev. CEFAC ; 19(1): 63-68, jan.-fev. 2017. tab
Article in Portuguese | LILACS | ID: biblio-842591

ABSTRACT

RESUMO Objetivo: avaliar as medidas antropométricas orofaciais segundo o tipo facial de crianças do sexo masculino e feminino. Métodos: participaram do estudo 126 crianças, 64 do sexo feminino e 62 do sexo masculino, com idade entre sete anos e 11 anos. As medidas antropométricas orofaciais foram comparadas entre os tipos faciais obtidos por meio da análise cefalométrica. Inicialmente foi realizada análise descritiva dos tipos faciais de acordo com os sexos. Por meio da Análise de Variância, foi realizada a comparação das medidas antropométricas no sexo masculino e feminino isoladamente e, posteriormente, foi realizada a análise independe do sexo. Os dados foram analisados considerando nível de significância de 5%. Resultados: encontrou-se um número maior de braquifaciais, seguidos de mesofaciais e dolicofaciais na totalidade da amostra. Na comparação das medidas antropométricas entre os três tipos faciais, evidenciou-se no sexo masculino diferença significante na medida de terço facial inferior e no sexo feminino, nas medidas da altura facial, terço inferior e lábio inferior. Quando comparadas as medidas antropométricas de forma independente do sexo, evidenciou-se diferença significante no terço inferior, lados direito e esquerdo da face, lábios superior e inferior. Conclusão: como esperado, nas análises de todos os resultados, considerando ou não os sexos, as medidas antropométricas orofaciais foram menores nos braquifaciais, com maior evidência encontrada nas medidas relacionadas ao plano vertical inferior.


ABSTRACT Purpose: assess anthropometric orofacial measurements of boys and girls according to facial type. Methods: participants were 126 children, 64 girls and 62 boys, aged between seven and 11 years. Anthropometric orofacial measurements were compared between the facial types obtained by cephalometric analysis. Initially, a descriptive analysis of facial types was conducted based on sex. Anthropometric measurements in boys and girls were compared separately by analysis of variance, followed by sex-independent analysis. Data were analyzed considering a significance level of 5%. Results: a larger number of brachyfacial individuals were found in the sample, followed by mesofacial and dolichofacial subjects. Comparison of facial measurements for the three types showed a significant difference in the lower third of the face among boys, and in face height, lower third and lower lip among girls. When anthropometric measurements were compared independently of sex, a significant difference was observed in the lower third, right and left sides of the face, as well as the upper and lower lips. Conclusion: as expected, analyses of all the results, considering sex or not, found lower anthropometric orofacial measurements in brachyfacial individuals, which was most evident in measurements related to the lower vertical plane.

16.
Braz. j. oral sci ; 15(3)July-Sept. 2016. ilus
Article in English | LILACS, BBO | ID: biblio-875039

ABSTRACT

Choosing the right chemical cleanser for removable partial dentures is a challenge, because they present an acrylic and a metallic portion, which should be cleaned and not damaged. Aim: The aim of this study was to assess surface changes of cobalt chromium alloys immersed in diferente cleaners solutions: 0.05% sodium hypochlorite, 4.2% acetic acid, 0.05% sodium salicylate, sodium perborate (Corega Tabs®) and 0.2% peracetic acid. Material and Methods: One hundred and twenty circular specimens (10 mm in diameter) of two commercial available Co-Cr alloys were tested: GM 800 ® (Dentaurum) and Co-Cr® (DeguDent). The samples were randomly divided into tem experimental groups (n=10), according to the trend mark of alloy and cleaners solutions in which they were immersed, and two control groups, in which the samples of the two alloys were immersed in distilled water. Evaluations were performed through roughness measurement (rugosimeter Surftest 211, Mitutoyo), visual evaluation with stereomicroscope (Stereo Discovery 20, Carl Zeiss) and scanning electron microscope surface (JSM, 6360 SEM, JEOL), at experimental times T0 ­ before immersions, T1 - after one immersion, and T2 - after 90 immersions. Intergroup comparison for the effect of immersion in the different cleanser agents was evaluated through ANOVA/Tukey tests (p≤0.05). The effect of the time in the immersion of each alloy was evaluated by t-pared test (p≤0.05). The two alloys were compared using the t-Student test. Results: The analysis of roughness and microscopy showed that surface changes were significantly greater in groups submitted to 0.05% sodium hypochlorite after 90 immersions (T2). When comparing the two alloys, a similar behavior of roughness was observed for the cleaning agents. However, alloy GM 800® showed significant statistical difference for roughness variations in experimental times (Δ1 and Δ2), when immersed in sodium 0.05% hypochlorite. The number of exposures of the alloys to the cleaning agents showed a negative influence when using sodium hypochlorite solution. Conclusions: It is possible to conclude that 0.05% sodium hypochlorite has caused the greatest apparent damage to alloy surface. (AU)


Subject(s)
Chromium Alloys , Dental Alloys , Denture Cleansers , Sodium Hypochlorite , Denture, Partial, Removable
17.
Dental press j. orthod. (Impr.) ; 21(2): 39-44, Mar.-Apr. 2016. tab, graf
Article in English | LILACS | ID: lil-782951

ABSTRACT

Abstract Objective: The aim of this study was to evaluate the shear bond strength (SBS) of brackets bonded to demineralized enamel pretreated with low viscosity Icon Infiltrant resin (DMG) and glass ionomer cement (Clinpro XT Varnish, 3M Unitek) with and without aging. Methods: A total of 75 bovine enamel specimens were allocated into five groups (n = 15). Group 1 was the control group in which the enamel surface was not demineralized. In the other four groups, the surfaces were submitted to cariogenic challenge and white spot lesions were treated. Groups 2 and 3 were treated with Icon Infiltrant resin; Groups 4 and 5, with Clinpro XT Varnish. After treatment, Groups 3 and 5 were artificially aged. Brackets were bonded with Transbond XT adhesive system and SBS was evaluated by means of a universal testing machine. Statistical analysis was performed by one-way analysis of variance followed by Tukey post-hoc test. Results: All groups tested presented shear bond strengths similar to or higher than the control group. Specimens of Group 4 had significantly higher shear bond strength values (p < 0.05) than the others. Conclusion: Pretreatment of white spot lesions, with or without aging, did not decrease the SBS of brackets.


resumo Introdução: o objetivo do presente estudo foi avaliar a resistência ao cisalhamento de braquetes colados ao esmalte desmineralizado e pré-tratado com uma resina infiltrante de baixa viscosidade (Icon, DMG) ou com um selante ionomérico (Clinpro XT Varnish, 3M Unitek), com e sem envelhecimento. Métodos: setenta e cinco (75) amostras de esmalte bovino foram divididas em cinco grupos (n = 15). No Grupo 1 (controle), a superfície do esmalte não foi desmineralizada. Nos outros quatro grupos, as superfícies foram submetidas ao desafio cariogênico e as lesões de manchas brancas foram tratadas previamente à colagem de braquetes. Nos Grupos 2 e 3, as lesões foram tratadas com a resina Icon; nos Grupos 4 e 5, com o selante Clinpro XT Varnish. Após o tratamento, os Grupos 3 e 5 foram envelhecidos artificialmente. Os braquetes foram colados, sobre as lesões tratadas, utilizando-se o sistema adesivo Transbond XT, e a resistência ao cisalhamento foi avaliada em máquina universal de ensaios. A análise estatística foi realizada por meio da análise de variância e, posteriormente, pelo teste post-hoc de Turkey. Resultados: todos os grupos testados apresentaram resistência ao cisalhamento semelhante ou maior do que o grupo controle. As amostras do Grupo 4 apresentaram valores de resistência ao cisalhamento significativamente maiores (p < 0,05) do que as dos demais grupos. Conclusão: o tratamento das manchas brancas, com ou sem envelhecimento, não diminuiu a resistência ao cisalhamento dos braquetes.


Subject(s)
Animals , Resins, Synthetic/administration & dosage , Dental Bonding/methods , Orthodontic Brackets , Composite Resins/administration & dosage , Resin Cements , Dental Caries/therapy , Shear Strength , Pit and Fissure Sealants , In Vitro Techniques , Cattle
18.
Rev. CEFAC ; 17(6): 1882-1888, nov.-dez. 2015. tab
Article in English | LILACS | ID: lil-770070

ABSTRACT

RESUMO: Objetivo: comparar as medidas antropométricas faciais de adultos segundo o modo respiratório e o sexo. Métodos: a amostra do estudo foi constituída por 82 sujeitos adultos, na faixa etária entre 18 e 35 anos, 59 do sexo feminino e 23 do sexo masculino. A partir das avaliações fonoaudiológica e otorrinolaringológica, foram diagnosticados 46 respiradores nasais e 36 respiradores orais. As medidas faciais foram obtidas com paquímetro e comparadas segundo diagnóstico do modo respiratório e sexo dos sujeitos, utilizando-se o teste t de Student e da Correlação de Pearson, com nível de significância de 5%. Resultados: as medidas antropométricas verticais (terço médio, terço inferior, altura facial, lábio superior e lábio inferior) foram significantemente maiores nos respiradores orais e apresentaram correlação positiva com o modo respiratório. Todas as medidas faciais realizadas foram maiores no sexo masculino e mostraram correlação positiva com a variável sexo. Conclusões: as medidas antropométricas faciais do plano vertical foram maiores nos respiradores orais, sugerindo padrão de crescimento facial mais alongado nesses sujeitos. Todas as medidas antropométricas faciais obtidas nos planos vertical, horizontal e transversal foram maiores nos sujeitos do sexo masculino.


ABSTRACT: Purpose: to compare facial anthropometric measures in adults according to breathing mode and gender. Methods: the study sample comprised 82 adult subjects, aged 18 to 35, 59 females and 23 males. From the speech-language and otorhinolaryngologic assessment, 46 nasal breathers and 36 mouth breathers were diagnosed. The facial measures were obtained with a caliper and compared according to the subject's diagnosis of breathing mode and gender, through the Student's t-test and Pearson's Correlation, with a significance level of 5%. Results: the vertical anthropometric measures (middle third, lower third, facial height, upper lip and lower lip) were found to be significantly higher in mouth breathers and displayed positive correlation with the breathing mode. All facial measurements performed were found to be higher in males and showed positive correlation with the variable gender. Conclusion: the facial anthropometric measurements of the vertical plane were found to be higher in mouth breathers, suggesting a more elongated facial pattern of growth in these subjects. All facial anthropometric measurements obtained in the vertical, horizontal and transverse planes were found to be higher in male subjects.

19.
Dental press j. orthod. (Impr.) ; 20(5): 78-85, tab, graf
Article in English | LILACS | ID: lil-764547

ABSTRACT

Objective: This study aimed to assess the efficiency of six protocols for cleaning-up tooth enamel after bracket debonding.Methods:A total of 60 premolars were divided into six groups, according to the tools used for clean-up: 12-blade bur at low speed (G12L), 12-blade bur at high speed (G12H), 30-blade bur at low speed (G30L), DU10CO ORTHO polisher (GDU), Renew System (GR) and Diagloss polisher (GD). Mean roughness (Ra) and mean roughness depth (Rz) of enamel surface were analyzed with a profilometer. Paired t-test was used to assess Ra and Rz before and after enamel clean-up. ANOVA/Tukey tests were used for intergroup comparison. The duration of removal procedures was recorded. The association between time and variation in enamel roughness (∆Ra, ∆Rz) were evaluated by Pearson's correlation test. Enamel topography was assessed by scanning electron microscopy (SEM).Results:In Groups G12L and G12H, original enamel roughness did not change significantly. In Groups G30L, GDU, GR and GD, a smoother surface (p < 0.05) was found after clean-up. In Groups G30L and GD, the protocols used were more time-consuming than those used in the other groups. Negative and moderate correlation was observed between time and (∆Ra, ∆Rz); Ra and (∆Ra, ∆Rz); Rz (r = - 0.445, r = - 0.475, p < 0.01).Conclusion:All enamel clean-up protocols were efficient because they did not result in increased surface roughness. The longer the time spent performing the protocol, the lower the surface roughness.


Objetivo: esse estudo objetivou avaliar a eficiência de seis protocolos de remoção de resina do esmalte após a descolagem de braquetes.Métodos:sessenta (60) pré-molares foram divididos em seis grupos conforme as ferramentas utilizadas: broca de 12 lâminas em baixa rotação (G12L), broca de 12 lâminas em alta rotação (G12H), broca de 30 lâminas em baixa rotação (G30L), polidor DU10CO-ORTHO (GDU), Renew System (GR) e polidor Diagloss (GD). As médias de rugosidade (Ra) e profundidade média de rugosidade (Rz) da superfície do esmalte foram analisadas com perfilômetro. Teste t pareado foi utilizado para avaliar Ra e Rz antes e depois da limpeza do esmalte; testes de ANOVA/Tukey foram utilizados para avaliar a diferença intergrupos. A duração dos procedimentos de remoção da resina foi registrada. Ainda, a associação entre o tempo e a variação da rugosidade do esmalte (ΔRa, ΔRz) foi avaliada pelo teste de correlação de Pearson. A topografia do esmalte também foi avaliada, por microscopia eletrônica de varredura (MEV).Resultados:nos grupos G12L e G12H, a rugosidade do esmalte original não se alterou significativamente. Nos Grupos G30L, GDU, GR e GD, foi verificada superfície mais lisa após a limpeza (p< 0,05). Nos Grupos G30L e GD, os protocolos utilizados foram mais demorados que nos demais grupos. Foi observada correlação negativa e moderada entre tempo, ΔRa e ΔRz (r = -0.445, r = -0.475, p< 0,01).Conclusão:todos os protocolos de limpeza do esmalte foram eficientes, pois não resultaram no aumento da rugosidade superficial. Quanto maior o tempo gasto, menor a rugosidade da superfície.


Subject(s)
Humans , Surface Properties , Bicuspid/anatomy & histology , Dental Debonding/instrumentation , Dental Debonding/methods , Resins, Synthetic , Time Factors , Microscopy, Electron, Scanning , Orthodontic Brackets , Tungsten Compounds , Diamond , Dental Enamel/injuries
20.
Dental press j. orthod. (Impr.) ; 20(5): 50-57, tab, graf
Article in English | LILACS | ID: lil-764543

ABSTRACT

Objective:The aim of this study was to assess the degree of perception of occlusal plane inclination and mandibular deviation in facial esthetics, assessed by laypeople, dentists and orthodontists.Methods:A woman with 5.88° of inclination and 5.54 mm of mandibular deviation was selected and, based on her original photograph, four new images were created correcting the deviations and creating more symmetric faces and smiles. Examiners assessed the images by means of a questionnaire. Their opinions were compared by qualitative and quantitative analyses.Results:A total of 45 laypeople, 27 dentists and 31 orthodontists filled out the questionnaires. All groups were able to perceive the asymmetry; however, orthodontists were more sensitive, identifying asymmetries as from 4.32° of occlusal plane inclination and 4.155 mm of mandibular deviation (p< 0.05). The other categories of evaluators identified asymmetries and assigned significantly lower grades, starting from 5.88° of occlusal plane inclination and 5.54 mm of mandibular deviation (p< 0.05).Conclusion:Occlusal plane inclination and mandibular deviation were perceived by all groups, but orthodontists presented higher perception of deviations.


Objetivo: o objetivo do presente estudo foi avaliar o grau de percepção, de leigos, dentistas e ortodontistas, quanto à influência das inclinações do plano oclusal e dos desvios mandibulares na estética facial.Métodos:uma mulher com 5,88o de desvio do plano oclusal e 5,54mm de desvio mandibular foi selecionada. A partir de sua fotografia original, quatro novas imagens foram criadas, corrigindo os desvios e criando rostos e sorrisos mais simétricos. Os examinadores avaliaram as imagens por meio de um questionário, sendo realizadas análises qualitativas e quantitativas.Resultados:45 leigos, 27 dentistas e 31 ortodontistas preencheram os questionários. Todos os grupos foram capazes de perceber a assimetria, no entanto, os ortodontistas foram mais sensíveis, sendo capazes de perceber a assimetria de 4,32o de inclinação do plano oclusal e 4,155mm de desvio mandibular (p > 0,05). Os demais avaliadores perceberam a assimetria apenas a partir de 5,88o de desvio do plano oclusal e 5,54mm de desvio mandibular (p > 0,05).Conclusão:inclinações do plano oclusal e desvios mandibulares foram percebidos por todos os grupos, mas os ortodontistas apresentaram maior sensibilidade aos desvios.


Subject(s)
Humans , Esthetics, Dental/psychology , Esthetics, Dental/statistics & numerical data , Facial Asymmetry/psychology , Cephalometry , Surveys and Questionnaires , Dental Occlusion , Dentists/psychology , Orthodontists/psychology , Malocclusion/psychology , Mandible
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