title: Evaluation of shear bond strength of three different types of artificial teeth to heat cure denture base resin: an in vitro study.
abstract: BACKGROUND
  Bonding of artificial teeth and denture base material remained a significant problem for successful prosthetic treatment.
  
  
  OBJECTIVE
  The purpose of this in vitro study was to evaluate shear bond strength of three different artificial teeth with heat cure denture base material after various surface conditioning methods and thermocycling.
  
  
  METHODS
  Ninety mandibular first molar denture teeth were selected. They were divided into three groups, Group I: Nanocomposite resin (Veracia), Group II: Composite teeth (Endura), and Group III: Cross-linked acrylic denture teeth (Acry rock). All groups were further subdivided into subgroups based on surface conditioning methods. Subgroup A: No surface conditioning (control group), Subgroup B: Surface conditioning with methyl methacrylate-based bonding agent (Vitacoll), and Subgroup C: Air abrasion with 50 μm aluminum oxide powder particles plus silane-coupling agent (Monobond-S) and Vitacoll bonding agent. Evaluation of shear bond strength of all the specimens was done using universal testing machine.
  
  
  RESULTS
  Mean shear bond strength of Group I, Subgroup B (6.87 ± 0.934) showed higher value when compared with Group II, Subgroup B (6.76 ± 1.84) and Group III, Subgroup B (5.66 ± 2.18). The control group (untreated surface) of all three types of artificial teeth used in this study showed significantly lower shear bond strength values than experimental groups (surface conditioning methods; P < 0.05).
  
  
  CONCLUSIONS
  The results of this study suggest that there were significant differences in shear bond strength among control group and surface treatment groups of denture teeth bonded to heat cure denture base resin.
authors.affiliation: Department of Prosthodontics, Kamineni Institute of Dental Sciences, Sreepuram, Narketpally, Nalgonda (Dt), Andhra Pradesh, India.
authors.forename: B
authors.initials: B
authors.lastname: Chittaranjan
authors.forename: M
authors.initials: M
authors.lastname: Taruna
authors.forename: N
authors.initials: N
authors.lastname: Sudheer
authors.forename: Nagesh S
authors.initials: NS
authors.lastname: Patil
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003799:Dental Stress Analysis; D003819:Denture Bases; D066298:In Vitro Techniques; D008963:Molar; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D033081:Shear Strength; D013499:Surface Properties; D014093:Tooth, Artificial
chemical_list: D003188:Composite Resins; D019904:Polymethyl Methacrylate