RESUMO Objetivo: Avaliar a influência da contenção fixa 3x3 no apinhamento anterior em casos tratados com extração de incisivo inferior. Métodos: A amostra foi constituída por arquivos ortodônticos das fases pré-tratamento, pós-tratamento e avaliação em longo prazo, de 16 pacientes (10 mulheres e 6 homens) portadores de má oclusão de Classe I tratados com a extração de um único incisivo inferior. As idades médias (± DP) pré-tratamento, pós-tratamento e na avaliação em longo prazo foram 23,45 ± 9,14 anos, 25,50 ± 8,95 anos e 30,11 ± 8,59 anos, respectivamente. O tempo médio (± DP) de tratamento e de acompanhamento em longo prazo foi 2,05 ± 0,45 anos e 4,60 ± 1,85 anos, respectivamente. Nos modelos de gesso, foram avaliados o Índice de Irregularidade de Little e as distâncias interdentárias. A amostra foi dividida em dois subgrupos, de acordo com a presença da contenção fixa 3x3 na avaliação em longo prazo. Resultados: O grupo sem contenção fixa apresentou uma maior recidiva na avaliação em longo prazo, quando comparado com o grupo que tinha a contenção fixa. Conclusão: Houve uma recidiva significativa nos casos tratados com extração de incisivo, na avaliação em longo prazo. O subgrupo sem contenção fixa 3x3 mostrou uma recidiva significativa em longo prazo, quando comparado ao grupo com contenção.

ABSTRACT Objective: To evaluate the 3x3 bonded retainer influence on the mandibular anterior crowding in cases treated with mandibular incisor extraction Methods: The sample comprised pretreatment, posttreatment and follow-up orthodontic records of 16 subjects (10 females and 6 males) with Class I malocclusion treated with extraction of a single mandibular incisor. The mean ages (± SD) at pretreatment, posttreatment and follow-up evaluation were 23.45 ± 9.14 years, 25.50 ± 8.95 years and 30.11 ± 8.59 years, respectively. The mean (± SD) treatment time and posttreatment evaluation time were 2.05 ± 0.45 years and 4.60 ± 1.85 years , respectively. Little irregularity index and interdental widths were evaluated using dental casts. The sample was divided into two subgroups, according to the presence of the 3x3 bonded retainer at follow-up. Results: The subgroup without 3x3 bonded retainer presented a greater relapse at the follow-up, when compared to 3x3 bonded retainer subgroup. Conclusion: There was a significant relapse in cases treated with mandibular incisor extraction at follow-up. The subgroup without 3x3 bonded retainer showed a significant relapse at the follow-up when compared to the retainer group.

Abstract The present study sought to evaluate the impact of quarantine resulting from the coronavirus disease 2019 (COVID-19) pandemic on dental appointments and patients’ positions and concerns regarding their ongoing dental treatment. Patients from private dental clinics answered an online questionnaire anonymously regarding their treatment, availability and willingness to attend dental appointments, and concerns about contamination. Descriptive statistics of the responses were performed with percentages and responses were compared between sexes, regions, and other aspects using the chi-squared test. Five hundred ninety-five patients (412 females and 183 males; mean age: 38.21 years) answered the questionnaire. Most patients reported they were receiving dental treatment (orthodontics) and would attend to a dental appointment; meanwhile, those patients not receiving treatment would not attend or would visit only in the case of an emergency. Males reported to be calmer than females, who were more anxious and afraid; as such, males reported more willing to go a dental appointment while, in general, females were not worried about how quarantine could affect dental treatment. Patients actively undergoing treatment and orthodontic patients were more concerned about a delay in treatment. There was a significant association between feelings about the COVID-19 pandemic and the level of willingness to attend a dental appointment. The quarantine recommended due to the COVID-19 pandemic was shown to have an impact on dental appointments and the anxiety levels of patients, since there was a significant association between patients’ feelings and their willingness to attend a dental appointment. Overall, patients undergoing dental treatment and orthodontics were more willing to attend an appointment and were more concerned about an increase in treatment duration.

RESUMO Objetivo: avaliar a atratividade e a percepção estética do sorriso com alterações simétricas e assimétricas dos zênites gengivais, por leigos, dentistas e ortodontistas. Métodos: foram tiradas fotografias posadas de cinco pacientes, de forma padronizada. Cada fotografia foi digitalmente manipulada no software Keynote, na região do zênite gengival, em incrementos de 0,5 a 1 mm, nos incisivos centrais e laterais superiores, de maneira simétrica e assimétrica, de nove formas diferentes para cada paciente. Posteriormente, essas fotografias foram dispostas em um website para que os avaliadores pudessem observá-las e, conforme sua percepção estética, dessem notas de 1 a 10, sendo 1 para pouco atrativa e 10 para muito atrativa. Foram utilizados os testes Kruskal-Wallis e Mann-Whitney para as comparações. Resultados: os zênites gengivais assimétricos foram considerados menos atrativos do que os simétricos. Diferenças entre os zênites gengivais maiores que 1 mm foram perceptíveis na atratividade do sorriso por todos os grupos de avaliadores. Quando comparados os incisivos centrais e laterais superiores, as alterações estéticas feitas nos incisivos centrais foram mais perceptíveis do que as feitas nos laterais, tanto as simétricas quanto as assimétricas. Os ortodontistas e os clínicos gerais foram mais críticos ao avaliar e perceber as alterações, com os leigos percebendo essa mudança somente a partir de 1 mm de alteração assimétrica no incisivo central superior direito. Conclusões: zênites gengivais assimétricos são menos atrativos do que os simétricos. Diferenças nos zênites maiores que 1 mm são perceptíveis na atratividade do sorriso. Ortodontistas e clínicos gerais são mais críticos ao avaliar sorrisos.

ABSTRACT Objective: To evaluate the smile attractiveness of different gingival zeniths by general dentists, orthodontists and laypersons and the esthetic perception in the symmetric and asymmetric changes in gingival zeniths. Methods: Posed photographs of five patients were taken and digitally manipulated in Keynote software, in the gingival zenith region, in increments of 0.5 to 1mm in maxillary central and lateral incisors, symmetrically and asymmetrically, in nine different ways for each patient. The photos were then uploaded to a website, where evaluators (general dentists, orthodontists and laypersons) could observe and vote according to their esthetic perception, scoring from 1 to 10, 1 being the least attractive and 10 the more attractive. Kruskal-Wallis and Mann-Whitney tests were used for comparison. Results: Asymmetric gingival zeniths were less attractive than symmetrical gingival zeniths; gingival zenith differences greater than 1mm were perceptible in the smile attractiveness, both by laypersons, general dentists and orthodontists. When comparing maxillary central incisors with maxillary lateral incisors, the aesthetic change performed in the central incisors are more perceptible than those performed in lateral incisors, both symmetrical and asymmetrical. In a general way, orthodontists and general dentists are more critical in the evaluation and perception of gingival zenith changes, with the laypersons perceiving this change only from 1mm of maxillary right central incisor asymmetrical change. Conclusions: Asymmetric gingival zeniths are less attractive than symmetrical ones. Gingival zenith differences greater than 1mm are perceptible in the smile attractiveness. Orthodontists and general dentists are more critical in evaluating smile esthetics.