Shear bond strength and bonding time of precoated and uncoated ceramic brackets / Resistência adesiva e tempo de colagem de brackets cerâmicos com bases pré-adesivadas e convencionais

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Introduction: The aim of this study was to evaluate Shear Bond Strength (SBS) and Bonding Time (BT) of precoated and uncoated ceramic brackets. Methods: 60 permanent bovine incisors, extracted and stored according to ISO/TR 11405 were used. According to bonding systems, the teeth were divided into 2 groups: G1: 30 uncoated Transcend 6000 (3M Unitek) ceramic brackets, G2: 30 precoated Transcend 6000 (3M Unitek) ceramic brackets. The SBS was measured on an EMIC DL 500 at a crosshead speed of 0.5 mm/min and the BT through a professional chronometer. Results: SBS of the groups were: G1 8.43 MPa and G2 11.96 MPa. Students t-test demonstrated that SBS was statistically different among the groups (p<0.05). Considering TC the results were: G1 2.89 min and G2 2.42 min. Mann-Whitney U test showed that there was statistical difference among groups for BT (p<0.05). Conclusions: Precoated ceramic brackets show higher SBS than the uncoated ones. Uncoated brackets show longer BT compared to the precoated ones.

ASSUNTO(S)

odontologia braquetes ortodônticos colagem dentária adesivos dentários

ACESSO AO ARTIGO

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