title: Effects of different surface treatments on the bond strength of acrylic denture teeth to polymethylmethacrylate denture base material.
abstract: OBJECTIVE
  The purpose of this study was to investigate the effects of various surface pretreatments in the ridge lap area of acrylic resin denture teeth on the shear bond strength to heat-polymerized polymethylmethacrylate (PMMA) denture base resin.
  
  
  BACKGROUND
  Tooth debonding of the denture is a major problem for patients with removable prostheses.
  
  
  METHODS
  A total of 84 central incisor denture teeth were used in this study. Seven test groups with 12 specimens for each group were prepared as follows: untreated (control, group C), ground, with a tungsten carbide bur (group H), airborne-particle abrasion (group AA), primed with methyl methacrylate (group M), treated with izobutyl methacrylate (group iBMA), Eclipse Bonding Agent applied (group E), and Er:YAG laser irradiated (group L). Test specimens were produced according to the manufacturers' instructions and mounted to a universal testing machine for shear testing with a crosshead speed of 1 mm/min. Data were evaluated by one way variance analysis (ANOVA) and Tukey's test (α=0.05).
  
  
  RESULTS
  Similar bond strength values were found between groups L and M, and these were the highest shear bond strengths among the groups. The lowest one was observed in group E. All surface treatments, except group E, exhibited significant difference when compared with group C (p<0.05).
  
  
  CONCLUSIONS
  Lasing of the ridge lap area to enhance the bond strength of acrylic resin denture teeth to PMMA denture base resin might be an alternative to wetting with MMA monomer. To overcome tooth debonding, surface treatment of the ridge lap area should be performed as part of denture fabrication.
authors.affiliation: 1 Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University , Sivas, Turkey .
authors.forename: Hakan
authors.initials: H
authors.lastname: Akin
authors.forename: Omer
authors.initials: O
authors.lastname: Kirmali
authors.forename: Faik
authors.initials: F
authors.lastname: Tugut
authors.forename: Mehmet Emre
authors.initials: ME
authors.lastname: Coskun
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D017005:Dental Debonding; D003799:Dental Stress Analysis; D003819:Denture Bases; D003778:Dentures; D007180:Incisor; D053844:Lasers, Solid-State; D055115:Light-Curing of Dental Adhesives / Q000295:instrumentation*; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; C509237:Eclipse Prosthodontic Resin; D008689:Methacrylates; D019904:Polymethyl Methacrylate