Comparative in vitro study of the shear bond strength of brackets bonded with restorative and orthodontic resins

• Published in: Brazilian oral research Vol. 25; no. 1; pp. 49 - 55
• Main Authors: Isber, Hassan, Ambrosio, Aldrieli Regina, Carvalho, Paulo Eduardo Guedes, Valle-Corotti, Karyna Martins do, Siqueira, Danilo Furquim
• Format: Journal Article
• Language: English; Portuguese
• Published: Brazil Sociedade Brasileira de Pesquisa Odontológica - SBPqO 01.01.2011; Sociedade Brasileira de Pesquisa Odontológica
• Subjects: Bisphenol A-Glycidyl Methacrylate - chemistry; Composite Resins - chemistry; Dental Bonding; Dental Bonding - methods; Dental Cements; Dental Stress Analysis; Dentistry; DENTISTRY, ORAL SURGERY & MEDICINE; Humans; In Vitro Techniques; Materials Testing; Orthodontic Brackets; Orthodontics; Shear Strength; Silicon Dioxide - chemistry; Stress, Mechanical; Surface Properties; Time Factors; Zirconium - chemistry; Orthodontic Brackets; Dental Cements; Shear Strength; Dental Bonding; Orthodontics
• ISSN: 1806-8324; 1807-3107; 1807-3107; 1806-8324
• DOI: 10.1590/S1806-83242011000100009

The aim of this study was to evaluate the shear bond strength of brackets bonded with different restorative systems and compare it with that afforded by an established orthodontic bonding system. Seventy human bicuspids were used, divided into five different groups with 14 teeth each. Whereas a specific orthodontic bonding resin (Transbond™ XT) was used in the control group, the restorative systems Charisma, Tetric Ceram, TPH Spectrum and Z100 were used in the other four groups. Seven days after bonding the brackets to the samples, shear forces were applied under pressure in a universal testing machine. The data collected was evaluated using the ANOVA test and, when a difference was identified, the Tukey test was applied. A 5% level of significance was adopted. The mean results of the shear bond strength tests were as follows: Group 1 (Charisma), 14.98 MPa; Group 2 (Tetric Ceram), 15.16 MPa; Group 3 (TPH), 17.70 MPa; Group 4 (Z100), 13.91 MPa; and Group 5 or control group (Transbond™ XT), 17.15 MPa. No statistically significant difference was found among the groups. It was concluded that all tested resins have sufficient bond strength to be recommended for bonding orthodontic brackets.