title: Assessment and comparison of retention of zirconia copings luted with different cements onto zirconia and titanium abutments: An in vitro study.
abstract: OBJECTIVE
  The purpose of this in vitro study was to assess and compare the retention of zirconia copings luted with different luting agents onto zirconia and titanium abutments.
  
  
  METHODS
  Titanium and zirconia abutments were torqued at 35 N/cm onto implant analogs. The samples were divided into two groups: Group A consisted of four titanium abutments and 32 zirconia copings and Group B consisted of four zirconia abutments and 32 zirconia copings and four luting agents were used. The cemented copings were subjected to tensile dislodgement forces and subjected to ANOVA test.
  
  
  RESULTS
  Zirconia abutments recorded a higher mean force compared to titanium. Among the luting agents, resin cement recorded the highest mean force followed by zinc phosphate, glass ionomer, and noneugenol zinc oxide cement, respectively.
  
  
  CONCLUSIONS
  Highest mean retention was recorded for zirconia implant abutments compared to titanium abutments when luted with zirconia copings.
authors.affiliation: Department of Prosthodontics, VS Dental College and Hospital, Bengaluru, Karnataka, India.
authors.forename: Neelima Sreekumar
authors.initials: NS
authors.lastname: Menon
authors.affiliation: Department of Prosthodontics, VS Dental College and Hospital, Bengaluru, Karnataka, India.
authors.forename: G P Surendra
authors.initials: GP
authors.lastname: Kumar
authors.affiliation: Department of Prosthodontics, VS Dental College and Hospital, Bengaluru, Karnataka, India.
authors.forename: K R
authors.initials: KR
authors.lastname: Jnanadev
authors.affiliation: Department of Prosthodontics, VS Dental College and Hospital, Bengaluru, Karnataka, India.
authors.forename: C L
authors.initials: CL
authors.lastname: Satish Babu
authors.affiliation: Department of Prosthodontics, VS Dental College and Hospital, Bengaluru, Karnataka, India.
authors.forename: Shilpa
authors.initials: S
authors.lastname: Shetty
keywords: Titanium abutment; zirconia abutment; zirconia copings