Controlled clinical trial addressing teeth whitening with hydrogen peroxide in adolescents: a 12-month follow-up

OBJECTIVES: To evaluate the colorimetric change in incisors and canines of adolescents aged 12 to 20 years submitted to at-home whitening and to evaluate satisfaction, sensitivity and discomfort during the procedures through a questionnaire. METHOD: Thirty adolescents were randomly assigned to the following groups: 1) 6.0% hydrogen peroxide (White Class with calcium - FGM); 2) 7.5% hydrogen peroxide (White Class with calcium - FGM); 3) 10% hydrogen peroxide (Oral B 3D White - Oral-B); 4) Control group - placebo. Assessments were performed prior to treatment as well as at 7, 30, 180 and 360 days after treatment. Friedman’s ANOVA was used to analyze color. The Kruskal-Wallis test followed by Dunn’s post hoc test was used to compare the groups at the different evaluation times. Answers on the questionnaires were ranked, and non-parametrical tests were employed. The groups were compared in each period using the Kruskal-Wallis test followed by the Student-Newman-Keuls test. Categorical data were analyzed using Fisher's exact test, and the Wilcoxon test was used for the analysis of different periods. P-values were corrected using the Hyan-Holm step-down Bonferroni procedure. Clinicaltrials.gov: NCT01998386. RESULTS: Similar results were obtained one month after treatment with both tooth whitening gels and whitening strips. Patients were partially satisfied with the treatment after the first and second weeks and would recommend it. All products demonstrated color stability after 12 months of follow-up. CONCLUSIONS: The bleaching procedure was efficient, and the patients could perceive its result. Further investigations are needed to determine the effects of bleaching on young teeth.

Association between temporomandibular disorder and body mass index in institutionalized children

Temporomandibular disorders (TMD) is a term applied to functional changes of the temporomandibular joint (TMJ) and associated structures of mastication. Aim: To investigate the correlation between body mass index (BMI) and TMD in children. Methods: 70 children between 6 and 14 years enrolled in the Rogationist Benevolent Institute of charity in the city of São Paulo (Brazil) underwent clinical examination by one calibrated examiner for the use of Research Diagnostic Criteria for TMD. Weight and height were determined by anthropometric assessment for the diagnosis of nutritional status, and BMI was calculated by dividing weight in kilograms by height in meters squared (kg/m2). Descriptive analysis (mean and standard deviation) was used to characterize the sample. ANOVA complemented by the Least Significant Difference test was used to compare the mean anthropometric measurements between the genders and the groups with and without TMD. The significance level was set at 0.05. Results: We found a significantly high prevalence of TMD, as well as a significant association between TMD light and low body weight. Conclusions: The results show a high prevalence of TMD and a slight association between TMD and children with low body weight.

Avaliação in vitro da microinfiltração nas faces proximais de molares decíduos com diferentes compômeros / In vitro evaluation of microleakage in deciduos teeth in the proximal faces using different compomers

Foi avaliada neste estudo a microinfiltração em slot proximal de molares decíduos restaurados com os seguintes compômeros disponíveis no mercado: Freedom (SDI), Compoglass (Vivadent), Dyract/AP (Dentsply) e F2000 (3M). Selecionou-se 16 molares decíduos provenientes do Banco de Dentes Humanos da FOUSP, nos quais foram realizados praparos tipo slot proximal. Após os preparos, os dentes foram divididos em 4 grupos e restaurados seguindo as especificações dos fabricantes. Após o tempo de presa, realizou-se a impermeabilização dos dentes seguida de imersão em corante azul de metileno pelo período de 4 horas. As amostras foram então seccionadas em sentido longitudinal e três examinadores previamente calibrados atribuiram notas para o grau de microinfiltração...

The aim of the study was to evaluate microleakage in proximal slot of deciduos molares using eight different marks of compomers. Sixteen deciduos molars were selected the Human Dental Bank os FOUSP underwent proximal slot cavities. They were then randomly divided into 4 groups Freedom (SDI), Compoglass (Vivadent), Dyract (Dentsply) e F2000 (3M) and restored falowing the manufactures specifications. After setting time, we performed waterproofing followed by submersion in blue methyilene during 4 hours. Molars were crosscut on a longtudinal fashion and three blinded examiners acored the microleakage from 0 to 4...

Aesthetic restoration of deciduous anterior teeth after removal of carious tissue with Papacárie.

The development of conservative techniques for the removal of carious tissue and the improvement of dental restoration materials allow better preservation of the dental structure. Chemomechanical caries removal is a conservative and atraumatic alternative. Papacárie is a papain-based material developed to act only on the carious dentin, allowing its easy removal with a blunt curette. This study aims to present a clinical case of aesthetic restoration of both upper deciduous central incisors after the removal of carious tissue with Papacárie.