title: Bond strength of compomers to dentin using acidic primers.
abstract: OBJECTIVE
  To determine the in vitro bond strengths of seven compomer/bonding agent restorative systems to human dentin.
  
  
  METHODS
  Seven compomer/bonding agents were bonded to human dentin, stored in water at 37 degrees C for 24 hours, and debonded in tension. Bonding conditions were with and without phosphoric acid etching, with and without the use of combined primer/bonding agents, and under moist and wet bond interfaces.
  
  
  RESULTS
  Without phosphoric acid etching, F2000/F2000 Compomer Primer/Adhesive and F2000/Single Bond Dental Adhesive System were less sensitive to dentin wetness. With moist dentin, bond strengths of Dyract/Prime & Bond 2.1, Dyract AP/Prime & Bond 2.1, Hytac/OSB light-curing, one-component bonding agent, F2000/Single Bond, and Freedom/STAE single component light-cured dentin/enamel adhesive system, were improved with phosphoric acid etching. Also, with moist dentin, the bond strength of F2000/F2000 Compomer Primer/Adhesive in the 3M Clicker dispensing system was higher without phosphoric acid etching, whereas bonds of Compoglass/Syntac Single-component were not affected by phosphoric acid etching. Bonding did not occur without primer/bonding agent, regardless of surface condition or use of phosphoric acid etching.
authors.affiliation: Department of Restorative Dentistry and Biomaterials, University of Texas-Houston 77030-3402, USA. wtate@mail.db.uth.tmc.edu
authors.forename: W H
authors.initials: WH
authors.lastname: Tate
authors.forename: C
authors.initials: C
authors.lastname: You
authors.forename: J M
authors.initials: JM
authors.lastname: Powers
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000704:Analysis of Variance; D020770:Compomers / Q000737:chemistry*; D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D019544:Equipment Failure Analysis; D006801:Humans; D008422:Materials Testing; D010756:Phosphoric Acids; D018709:Statistics, Nonparametric; D013718:Tensile Strength; D014867:Water / Q000737:chemistry
chemical_list: D020770:Compomers; D017220:Dentin-Bonding Agents; D010756:Phosphoric Acids; D014867:Water; C030242:phosphoric acid