Primary stability of different implant macrodesigns in a sinus floor elevation simulated model: An Ex Vivo Study

Abstract

Background: A novel type of implant (Straumann® BLX implant) has been developed for certain stability from the mechanical and biological aspects and is expected for the implant placement in atrophic maxilla with sinus floor elevation (SFE). Purpose: The aim of this study was to evaluate the primary stability in the implants with different macrodesigns in a SFE simulated model. Primary stability defined as maximum insertion torque (MIT) and implant stability quotient (ISQ) were compared between this novel type of implant and other types.Materials and Methods: Five types of Straumann® 10mm length implants (Standard Plus; SP, Tapered Effect; TE, Bone Level; BL, Bone Level Tapered; BLT and BLX) and two types of Straumann® 6mm length implants (SP short, BLX short) were used in this study. Each Implants were inserted through 5 mm–thick porcine iliac crest blocks (a SFE simulated model). Primary stability was evaluated by using MIT and ISQ. Results: The mean values of MIT for BLX group showed significantly higher values than SP, BL (p < 0.01), and TE (p < 0.05) groups. The mean value of ISQ for BLX group was significantly higher than the other groups (p < 0.01). The mean value of MIT and ISQ for BLX and BLX short group were significantly higher than that for SP and SP short group (p < 0.01). Conclusions: In a SFE simulated ex vivo model, BLX group showed the highest values. These results suggest that implant selection can play a crucial role in the achievement of primary stability during SFE and simultaneous implant placement.