title: The effect of airborne-particle abrasion on the shear bond strength of four restorative materials to enamel and dentin.
abstract: BACKGROUND
  The role of airborne-particle abrasion on the bond strength of restorative materials to enamel and dentin is controversial.
  
  
  OBJECTIVE
  The purpose of this study was to evaluate the effect of airborne-particle abrasion on the shear bond strengths of 4 restorative materials to enamel and dentin.
  
  
  METHODS
  One hundred twelve extracted human maxillary anterior teeth were divided into 2 groups of 56 teeth each. In the first group flat enamel surfaces were prepared, and in the second flat dentin surfaces were prepared. Half the teeth in each group (n=28) were airborne-particle abraded. The remaining 28 teeth in each group were prepared with silicone carbide paper (control). Specimens in both groups were divided into 4 subgroups (n=7). A composite, a compomer, a resin-modified glass ionomer cement, and a conventional glass ionomer cement were applied to enamel and dentin surfaces (3 mm diameter and 4 mm height). After 24 hours of storage in water, specimens were subjected to shear forces in a universal testing machine at a crosshead speed of 0.5 mm/min until fracture. Shear bond strength data (MPa) were analyzed with 3-way ANOVA and Tukey HSD tests (alpha=.05).
  
  
  RESULTS
  Airborne-particle-abraded specimens showed significantly higher shear bond strengths than control specimens. The 2-way interaction between tooth structure and restorative materials was significant.
  
  
  CONCLUSIONS
  The use of airborne-particle abrasion increased the shear bond strength of restorative materials tested to enamel and dentin.
authors.affiliation: Faculty of Dentistry, University of Ankara, Turkey. mujdeci@dentistry.ankara.edu.tr
authors.forename: Arzu
authors.initials: A
authors.lastname: Mujdeci
authors.forename: Osman
authors.initials: O
authors.lastname: Gokay
mesh_terms: D020906:Air Abrasion, Dental / Q000379:methods; D000537:Aluminum Oxide / Q000737:chemistry; D000704:Analysis of Variance; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure*; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000648:ultrastructure*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D017655:Silicon Compounds / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D017554:Carbon Compounds, Inorganic; D020770:Compomers; D003188:Composite Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; D019279:Resin Cements; D017655:Silicon Compounds; D014867:Water; D000537:Aluminum Oxide; C022088:silicon carbide