Abstract: Leprosy patients can present reactions during the course of the disease. There are no official data on these reactions in Brazil. We aimed to describe the epidemiological characteristics of patients with such reactions, analyzing information from patient records at a referral center in Campinas (SP), from 2010 to 2015.

O objetivo deste estudo foi avaliar os efeitos de cinco produtos clareadores a base de peroxido de carbamida 15-16% na microdureza da resina composta microhibrida Z-250 (3M/Espe). Setenta e dois especimes foram confeccionados com o uso de matrizes cilindricas (4×2 mm), preenchidas com resina composta e fotoativadas por 40 segundos. Eles foram divididos em 6 grupos de estudo (n=12), de acordo com o produto clareador utilizado: Review (SS White), Magic Bleaching (Vigodent), Opalescence (Ultra dent), Whiteness Perfect (FGM), Claridex (Biodinamica), e um grupo controle (nao clareado). Os especimes receberam 1 cc de produto clareador por 6 horas diarias durante 2 semanas, e durante todo o tempo eles foram mantidos em saliva artificial. Depois dos procedimentos clareadores todos os especimes foram analisados em um microdurometro. As medidas de dureza Knoop foram submetidas a analise estatistica parametrica (analise de variancia e Teste de Tukey). Os valores de dureza Knoop e seu desvio padrao foram: baseline, 68,52a (4,28); controle, 63,42b (7,16); Whiteness Perfect, 57,57c (1,81); Magic Bleaching, 57,22c (3,84); Opalescen ce, 57,03cd (4,00); Claridex, 53,64de (3,33); Review, 51,45e (2,82). Letras semelhantes significam resultados estatisticos semelhantes segundo o teste de Tukey, nivel de significancia 5%. Os produtos clareadores diminuiram significativamente a microdureza da resina composta microhibrida Z-250 (3M/Espe).

The purpose of this study was to evaluate the effects of five home bleaching products containing 15-16% carbamide peroxide on the microhardness of microhybrid composite resin Z-250 (3M/Espe). A total of 72 specimens were fabricated in cylindrical acrylic matrices (4×2 mm), filled with composite resin and photo-activated for 40 seconds. They were divided in 6 study groups (n=12), according to the bleaching product: Review (SS White), Magic Bleaching (Vigodent), Opalescence (Ultra dent), Whiteness Perfect (FGM), Claridex (Biodinamica), and a control group (not bleached). Specimens were exposed to 1 cc of bleaching gel for 6 hours daily for 2 weeks. The control group specimens were kept in artificial saliva throughout this time. All the specimens were then analyzed in a microhardness tester. Knoop hardness measurements were performed, and the results were submitted to parametric statistical analysis (analysis of variance and Tukey´s test). Mean Knoop values and standard deviation were: baseline, 68.52a (4.28); control, 63.42b (7.16); Whiteness Perfect, 57.57c (1.81); Magic Bleaching, 57.22c (3.84); Opalescen ce, 57.03cd (4.00); Claridex, 53.64de (3.33); Review, 51.45e (2.82). Identical letters mean statistical equality according to Tukey’s test at the 5% significance level. The products significantly decreased Z-250 (3M/Espe) microhardness.