Effect of Cement Type on Retention of Implant-Supported Crowns

Purpose: The aim of this study is to compare the retentive strength of implant cements with conventionally used cements. Materials and Methods: Standard titanium abutment was scanned by means of a 3D digital laser scanner. 40 standard metal copings were designed by a CAD/CAM system. Copings were cemented to the abutments using 1 of 4 luting cements (n=10) as (1) Premier Implant Cement (PIC), (2) TempBond NE (TB), (3) Multilink Implant (MI), (4) Adhesor Carbofine (AC). Copings were subjected to a pull-out test using a universal testing machine at a crosshead speed of 0.5 mm/min. Decementation load was analyzed with Oneway Anova and Tukey HSD tests at a confidence interval of 95%. Results: Cement groups showed statistically significant difference (p 0.01). Mean retentive strength of the groups were ranked as : TB (39,65±8,08 N), PIC (136,97±21,75 N), MI (301,60±28,43 N), AC (386,78±52,63 N). Conclusions: Decementation loads for the cements specifically formulated for usage with implant-supported restorations, were higher than that of conventional temporary cement and lower than that of conventional permanent cement.