Marginal Bone Loss Around Implants Supporting Cantilever Fixed Restorations

Objectives: The aim of this study was to evaluate the influence of cantilever extensions of implant supported fixed partial restorations on marginal bone loss around dental implants placed in the posterior region. Methods: A total of 66 ITI dental implants were placed in premolar and molar regions of 53 partially edentulous patients. All implants were restored by means of ceramic-to-metal fused cantilevered fixed partial prostheses. Radiographs were obtained after implant placement and at the 2-years recall after implant placement. Calibrated measurements were conducted initiating from the cantilever side and the opposing side bone peaks to the implant-bone junction on each radiograph. The mean values were analysed using One Way ANOVA. P values <0.01 were regarded as statistically significant. Results: There was statistically significant difference between the cantilever side bone loss rates of the upper and the lower jaw (p<0.01). There was also statistically significant difference between the opposing side bone loss rates of the upper and the lower jaw (p<0.01). Conclusion: In cantilever design, bone loss rates of the upper jaw were statistically higher.