Evaluation of shear bond strength of orthodontic resin and resin modified glass ionomer cement on bonding of metal and ceramic brackets

Objective: The aim of this study was to evaluate the shear bond strength of orthodontic resin and resin-modified glass ionomer cement on bonding of metal and ceramic brackets. Material and methods: Forty bovine teeth were sectioned and embedded into PVC with chemically-cured acrylic resin. The labia...

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Published inRevista Sul-Brasileira de odontologia Vol. 9; no. 2; pp. 170 - 176
Main Authors de Carvalho, Rosana Costa Casanovas, de Carvalho, Natália Maria Porto, Herênio, Synara Santos, Bauer, José Roberto de Oliveira, Paiva, Antonio Ernandes Macedo, Costa, José Ferreira, Costa, Elizabeth Lima
Format Journal Article
LanguageEnglish
Published Joinville Universidade da Região de Joinville - Univille, Revista RSBO 01.04.2012
Subjects
Acrylic resins
Adhesion tests
Adhesive bonding
Bond strength
Bonding strength
Brackets
Ceramic bonding
Ceramics
Chemical bonds
Orthodontics
Polyvinyl chloride
Production methods
Prophylaxis
Pumice
Shear
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Summary:Objective: The aim of this study was to evaluate the shear bond strength of orthodontic resin and resin-modified glass ionomer cement on bonding of metal and ceramic brackets. Material and methods: Forty bovine teeth were sectioned and embedded into PVC with chemically-cured acrylic resin. The labial surfaces were flattened and received prophylaxis with pumice and water. Then they were divided into four groups, according to the bonding material and the type of bracket. Group 1: metallic bracket + Transbond XT; Group 2: metallic bracket + Vitremer; Group 3: ceramic bracket + Transbond XT; Group 4: ceramic bracket + Vitremer. The bonding was performed according to the manufacturers' recommendations. The shear bond strength test was conducted in a universal testing machine (TIRAtest 2420) at a crosshead speed of 0.5 mm/min. Then, the fractured surfaces were evaluated using a stereomicroscope (x15 magnification) to check the adhesive remnant index. Data was subjected to two-way AN OVA and Tukey's test for pairwise comparisons (α = 0.05). Results: The results suggested a non-significant effect of the interaction lp > 0.97), and only n1ain factors were significant (p = 0.0001 ). The bond strength of Transbond XT was statistically higher than Vitremer. Ceramic brackets obtained the highest values of resistance when compared with metal brackets. Conclusion: The ceramic brackets bonded with Transbond XT orthodontic resin have excellent bond strength results.
ISSN:1806-7727
1984-5685