Effect of Three Types of Temporary Luting Agents and Abutment Surface Sandblasting on Retentive Strength of Implant Supported Fixed Prostheses

Achieving appropriate retention and easy retrievability at the same time is challenging in implant-supported fixed partial dentures (FPDs). Researchers have always been in search of a temporary cement to improve the retentive strength. The aim of this in vitro study was to evaluate the effect of three different temporary cements and sandblasting of the abutment surface on the retentive strength of implant-supported fixed prostheses. In this experimental study, 10 DIO implant analogues were embedded in acrylic resin. Twenty abutments were divided into two groups of 10. The abutments in group one were used in their intact standard form while those in group two were sandblasted. Sixty metal copings were fabricated and cemented on abutments of each group using three types of temporary cements namely Kerr, Provy and GC. Specimens were subjected to a universal testing machine to measure their retentive strength. The results were analyzed by Tukey’s post-hoc test. The retentive strength of TempBond (Kerr) with sandblasted abutments was significantly higher than that of the other two cements (p<0.001). In standard abutments, Provy had slightly but not significantly higher retentive strength. The lowest values in both abutment groups were obtained by GC cement. Kerr TempBond cement with sandblasted abutments yields the highest retentive strength.