title: Tensile bond strength of resin-modified glass-ionomer cement to microabraded and silica-coated or tin-plated high noble ceramic alloy.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the influence of alloy surface microabrasion, silica coating, or microabrasion plus tin plating on the tensile bond strengths between a resin-modified glass-ionomer luting cement and a high-noble alloy. Bond strength between the microabraded alloy specimens and conventional glass-ionomer cement or resin cement were included for comparison.
  
  
  METHODS
  One hundred twenty uniform size, disk-shaped specimens were cast in a noble metal alloy and divided into 6 groups (n = 10 pairs/group). The metal surfaces of the specimens in each group were treated and cemented as follows. Group 1: No surface treatment (as cast, control), cemented with a resin-modified glass-ionomer cement. Group 2: Microabrasion with 50-microm aluminum oxide particles, resin-modified glass-ionomer cement. Group 3: A laboratory microabrasion and silica coating system, resin-modified glass-ionomer cement. Group 4: Microabrasion and tin-plating, resin-modified glass-ionomer cement. Group 5: Microabrasion only, conventional glass-ionomer cement. Group 6: Microabrasion and tin-plating, conventional resin cement. The uniaxial tensile bond strength for each specimen pair was determined using an Instron Universal Testing Machine (Instron Corp, Canton, MA). Results were analyzed using a one-way analysis of variance (alpha = 0.05) and a Tukey post-hoc analysis.
  
  
  RESULTS
  Mean bond strength: Group 1: 3.6 (+/- 1.5) MPa. Group 2: 4.2 (+/-0.5) MPa. Group 3: 6.7 (+/- 0.9) MPa. Group 4: 10.6 (+/- 1.8) MPa. Group 5: 1.1 (+/- 0.4) MPa. Group 6: 14.6 (+/- 2.3) MPa. Group 6 was significantly stronger than Group 4. The bond strength of specimens cemented with the resin-modified glass-ionomer cement using microabrasion and tin-plating (Group 4) was significantly stronger than all other groups except the resin cement with microabrasion and tin-plating (Group 6).
  
  
  CONCLUSIONS
  Microabraded and tin-plated alloy specimens luted with the resin-modified glass-ionomer cement resulted in the greatest mean tensile strengths for the resin-modified glass-ionomer cement groups. This strength was 73% of the mean tensile strength of microabraded specimens luted with resin cement.
authors.affiliation: U.S. Air Force, Dental Corps, Dental Flight Commander, 66th Medical Group, Hanscom Air Force Base, MA, USA. jeffrey.swartz@hanscom.af.mil
authors.forename: J M
authors.initials: JM
authors.lastname: Swartz
authors.forename: R D
authors.initials: RD
authors.lastname: Davis
authors.forename: J D
authors.initials: JD
authors.lastname: Overton
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D000704:Analysis of Variance; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D002484:Cementation / Q000379:methods; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000295:instrumentation; D004595:Electroplating; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013223:Statistics as Topic; D013499:Surface Properties; D013718:Tensile Strength; D014001:Tin / Q000737:chemistry*
chemical_list: D017554:Carbon Compounds, Inorganic; D003722:Dental Alloys; D005899:Glass Ionomer Cements; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D019279:Resin Cements; D017655:Silicon Compounds; C049241:olympia; D014001:Tin; D012822:Silicon Dioxide; D000537:Aluminum Oxide; C022088:silicon carbide