title: Retentive strength of implant-supported base metal copings over short metal abutments using different luting agents and surface treatments.
abstract: OBJECTIVE
  To evaluate the effect of surface treatments on retention of implant-supported restorations over short abutments.
  
  
  METHODS
  One hundred twenty metal copings were made on Straumann solid abutments (3 mm length). The copings were divided into 2 groups: control and air abraded (50 μm Al2O3). The copings were luted using Fleck's, Poly F, Panavia F, and Fuji Plus. In resin cements groups, 2 subgroups were studied base on the application of Alloy Primer (n = 10). After conditioning in saliva and 5000 thermal cycles, retentive strengths of specimens were measured. Data were analyzed by 1-way ANOVA and Tukey honestly significant difference tests (α = 0.05).
  
  
  RESULTS
  Panavia F 2.0 combined with Alloy Primer showed the most retentive values. In control and air abraded groups, there was no significant difference between the studied luting agents. Alloy Primer significantly increased the retention of copings luted with Panavia F 2.0.
  
  
  CONCLUSIONS
  Within the limitations of this study, the retentive strength of metal copings over short implant abutments was not improved by airborne-particle abrasion. However, Alloy primer enhanced the retention of metal copings that were luted using Panavia F 2.0.
authors.affiliation: *Professor, Dental Materials Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran; Biomaterials Research Group, Isfahan University of Technology, Isfahan, Iran. †Professor, Torabinejad Dental Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran; Biomaterials Research Group, Isfahan University of Technology, Isfahan, Iran. ‡Assistant Professor, Department of Endodontics, School of Dentistry, Khorasgan Islamic Azad University, Isfahan, Iran. §Dental Student, Dental Students' Research Committee, School of Dentistry, Khorasgan Islamic Azad University, Isfahan, Iran.
authors.forename: Farahnaz
authors.initials: F
authors.lastname: Nejatidanesh
authors.forename: Omid
authors.initials: O
authors.lastname: Savabi
authors.forename: Maziar
authors.initials: M
authors.lastname: Ebrahimi
authors.forename: Ghazal
authors.initials: G
authors.lastname: Savabi
mesh_terms: D000044:Dental Abutments; D003738:Dental Cements / Q000627:therapeutic use*; D017268:Dental Prosthesis Retention / Q000379:methods*; D019094:Dental Prosthesis, Implant-Supported / Q000379:methods*; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements / Q000627:therapeutic use; D006801:Humans; D011076:Polycarboxylate Cement / Q000627:therapeutic use; D019279:Resin Cements / Q000627:therapeutic use; D015036:Zinc Phosphate Cement / Q000627:therapeutic use
chemical_list: D003738:Dental Cements; C061504:Flecks; C113301:FujiPlus; D005899:Glass Ionomer Cements; C438843:Panavia-Fluoro; D011076:Polycarboxylate Cement; D019279:Resin Cements; C029881:Poly F cement; D015036:Zinc Phosphate Cement