In vitro evaluation of an alternative method to bond molar tubes

• Main Authors: Célia Regina Maio Pinzan-Vercelino, Arnaldo Pinzan, Júlio de Araújo Gurgel, Fausto Silva Bramante, Luciana Maio Pinzan
• Format: Article
• Language: English
• Published: University of São Paulo 2011-02-01
• Series: Journal of Applied Oral Science
• Subjects: Molar; Shear strength; Dental bonding
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572011000100009

Despite the advances in bonding materials, many clinicians today still prefer to place bands on molar teeth. Molar bonding procedures need improvement to be widely accepted clinically. OBJECTIVE: The purpose of this study was to evaluate the shear bond strength when an additional adhesive layer was applied on the occlusal tooth/tube interface to provide reinforcement to molar tubes. MATERIAL AND METHODS: Sixty third molars were selected and allocated to the 3 groups: group 1 received a conventional direct bond followed by the application of an additional layer of adhesive on the occlusal tooth/tube interface, group 2 received a conventional direct bond, and group 3 received a conventional direct bond and an additional cure time of 10 s. The specimens were debonded in a universal testing machine. The results were analyzed statistically by ANOVA and Tukey's test (&#945;=0.05). RESULTS: Group 1 had a significantly higher (p<0.05) shear bond strength compared to groups 2 and 3. No difference was detected between groups 2 and 3 (p>0.05). CONCLUSIONS: The present in vitro findings indicate that the application of an additional layer of adhesive on the tooth/tube interface increased the shear bond strength of the bonded molar tubes.