Conservative reconstruction of the smile by orthodontic, bleaching, and restorative procedures

The following is a clinical case report of a patient whose chief complaint was the presence of generalized spacing in the maxillary anterior segment following orthodontic treatment. After meticulous clinical analyses and discussions of the clinical procedures to be adopted, dental bleaching was performed in both arches with 10% hydrogen peroxide (Opalescence Trèswhite Supreme 10% Hydrogen Peroxide - Ultradent Products, Inc., South Jordan, USA) after the conclusion and stabilization of orthodontic treatment. Then, the orthodontic appliance was removed and the diastemas in the maxillary anterior teeth were closed with Amelogen Plus (Ultradent Products, Inc., South Jordan, USA) resin composite. It was observed that the association of orthodontic, bleaching, and restorative procedures was capable of restoring dental shape, function, and esthetics, allowing the patient to smile without hesitation

Comparação da resistência ao cisalhamento de bráquetes com e sem tratamento na base utilizando três sistemas de colagem

Estabilidade da colagem dos acessórios ortodônticos durante o tratamento pode ser influenciado por vários fatores, dentre eles, o sistema de colagem eleito e o0 tipo de bráquete. Frente à importância de se elucidar ao máximo possível a respeito destas variáveis, esta pesquisa foi encetada com o propósito de comparar in vitro a resistência ao cisalhamento de bráquetes metálicos ortodônticos (AbZIL-LANCER) com bases em malha convencional e bráquetes com bases em malha pré-tratadas industrialmente com jateamento de óxido de alumínio. Para a realização deste trabalho, duzentos e quarenta incisivos bovinos foram selecionados e divididos aleatoriamente em seis grupos de quarenta cada (n = 40), segundo o tipo de base do bráquete e o material de colagem utilizado. Os acessórios (AbZIL.LANCER) foram diretamente colados nos dentes bovinos com três sistemas adesivos: Sistema A - resina fotopolimerizante Transbond XT convencional (3M - Unitek, St Paul, Mn, U.S.A.); Sistema B - TransbondTM Plus Self Etching Primer (SEP) + Transbond XT (3M - Unitek, St Paul, Mn,U.S.A.) e Sistema C - cimento de ionômero de vidro resinoso Fuji ORTHO LC em cápsulas (GC Corp., Tokyo, Japan). Os testes de cisalhamento foram realizados 24 horas após a colagem dos bráquetes, utilizando uma máquina universal de ensaios DL-3000 (EMIC - Equipamentos e Sistemas de Ensaio Ltda.), utilizando célula de carga de 200 Kgf e velocidade de 1mm/min. Os resultados obtidos foram submetidos aos testes estatísticos ANOVA a dois critérios e TUKEY, ambos em nível de significância a 5%. A análise estatística demonstrou não haver diferenças estatisticamente significante entre os resultados dos testes de cisalhamento das bases comparadas. Contudo, os valores encontrados revelaram diferenças espressivas no desenpenho dos sistemas de colagem, tendo o Sistema A - (14,92MPa) apresentado os resultados mais satisfatórios...Despite of the high-quality materials for orthodontic bonding have, an ideal bonding system has not been developed yet. The aim of this study was to test shear bond strength of two types of brackets bases. Two hundred and forty bovine incisors were randomly divided into 6 groups, according to the type of foil mesh (sandblasted or not) and the bonding materials. Brackets (AbZIL.LANCER) were directly bonded to teeth with 3 different bonding systems: System A - light-cured resin TransbondTM XT conventional XT (3M-Unitek, St Paul, Mn, U.S.A.); System B -TransbondTM XT + TransbondTM Plus Self Etching Primer (3M-Unitek, St Paul, Mn, U.S.A.) and System C - reinforced glass ionomer orthodontic cement Fuji ORTHO LC in capsules (GC Corp., Tokyo, Japan). The tests were performed 24 hours after bonding procedure in a DL 3000 (EMIC) testing machine, with a load cell of 200 Kgf in a 1mm/min speed. Results were analyzed by ANOVA and TUKEY tests at 5% of significance level. There were no statistical differences between the two types of brackets. However, there were statistical differences related to the bonding materials. Tukey's test revealed that System A presented the best shear bond strength (14,92MPa), followed by Systems B (10,66MPa) and C (13,24MPa), but there were not significantly differences between Systems A... (Complete abstract, click electronic address below

Comparison of the shear bond strengths of conventional mesh bases and sandblasted orthodontic bracket bases

This study aimed to compare in vitro the shear bond strength between metallic brackets (Abzil) with conventional mesh bases and metallic brackets with bases industrially sandblasted with aluminum oxide using three adhesive systems, in order to assess the influence of sandblasting on adhesiveness and to compare 3 different bonding systems. Two hundred and forty bovine incisors were used and randomly divided into 6 groups (40 teeth in each group), according to the bracket base and to the bonding system. The brackets were direct-bonded in bovine teeth with 3 adhesive systems: System A - conventional TransbondTM XT (3M - Unitek); System B - TransbondTM Plus Self Etching Primer + TransbondTM XT (3M - Unitek) and System C - Fuji ORTHO LC resin-reinforced glass ionomer cement in capsules (GC Corp.). Shear bond strength tests were performed 24 hours after bonding, in a DL-3000 universal testing machine (EMIC), using a load cell of 200 kgf and a speed of 1 mm/min. The results were submitted to statistical analysis and showed no significant difference between conventional and sandblasted bracket bases. However, comparison between the bonding systems presented significantly different results. System A (14.92 MPa) and system C (13.24 MPa) presented statistically greater shear bond strength when compared to system B (10.66 MPa). There was no statistically significant difference between system A and system C

Avaliação do Índice de Remanescente Adesivo utilizando braquetes com e sem tratamento na base e a interação com três sistemas de colagem Evaluation of Adhesive Remnant Index using conventional mesh bases and sandblasted orthodontic bracket bases and three bonding systems

OBJETIVO: avaliar o Índice de Remanescente Adesivo (IRA) em dentes bovinos após a descolagem de braquetes com e sem tratamento na base. METODOLOGIA: foram utilizados três sistemas de colagem ortodôntica para os dois padrões de base. Os dentes bovinos foram divididos em seis grupos de 40, de acordo com a base do braquete e o sistema de colagem. Vinte e quatro horas após a colagem foram realizados os testes de compressão em uma máquina de ensaios. A avaliação do IRA foi realizada em um estereomicroscópio por três examinadores calibrados. Foi utilizado o teste não paramétrico de Kruskal-Wallis, seguido do método de Dunn, para fazer as comparações múltiplas entre todos os grupos. RESULTADOS E CONCLUSÕES: observou-se que o tratamento das bases dos braquetes com óxido de alumínio não foi determinante para o aumento da adesividade entre o braquete e o adesivo. O grupo em que se utilizou braquetes com tratamento na base e adesivo TXT (3M-Unitek) + Transbond Plus SEP (3M-Unitek) apresentou a maior parte das fraturas na interface dente-adesivo (escore 4).<br>AIM: To assess the Adhesive Remnant Index (ARI) in bovine teeth after debonding mesh bases and sandblasted orthodontic bracket bases. METHODS: Were used three bonding systems for the two standards of base. The bovine teeth were divided into 6 groups of 40, according to the bracket base and to the bonding system. Twenty four hours after bonding they had been carried through shear bond strength tests in a universal testing machine. The assessment of ARI was performed in a stereomicroscopy by three calibrated examiners. It was used the non-parametric Kruskall-Wallis test, followed by Dunn's method, to do the multiple comparisons among all groups. RESULTS AND CONCLUSIONS: It was observed that the aluminum oxide sandblasting bracket bases was not determinative to the increase of the adhesiveness between bracket and adhesive. The group where it was used sandblasted orthodontic bracket bases and bonding system TXT (3M-Unitek) + Transbond Plus SEP (3M-Unitek) presented the majority of the failures at the teeth-adhesive interface (score 4)