title: In vitro evaluation of an alternative method to bond molar tubes.
abstract: 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.
  
  
  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 (α=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.
authors: Department of Orthodontics, University Center of Maranhão (UNICEUMA), São Luís, MA, Brazil. cepinzan@hotmail.com
authors: Célia Regina Maio
authors: CR
authors: Pinzan-Vercelino
authors: Arnaldo
authors: A
authors: Pinzan
authors: Júlio de Araújo
authors: Jde A
authors: Gurgel
authors: Fausto Silva
authors: FS
authors: Bramante
authors: Luciana Maio
authors: LM
authors: Pinzan
mesh_terms: D000134:Acid Etching, Dental; D000704:Analysis of Variance; D055117:Curing Lights, Dental; D001840:Dental Bonding / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D066298:In Vitro Techniques; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D008963:Molar / Q000648:ultrastructure*; D033081:Shear Strength; D013499:Surface Properties; D013997:Time Factors
chemical_list: D017220:Dentin-Bonding Agents