LAUSR

OBJECTIVE This study aims to report the implant survival rate of dental implants of partially dentate patients in the anterior mandible and the potential risk indicators for implant failure. MATERIAL & METHODS Patients with implant supported restorations of single or multiple teeth in the anterior mandible restored with fixed partial implant supported restorations were revaluated. Patient demographic data, implant placement timing and loading protocol, biological and/or technical complications at the time of the last clinical and radiographic follow-up visit were registered. Survival rate, success rate, and potential risk indicators for implant failure were calculated. RESULTS A total of one hundred and eight patients (108) and one hundred and eighty-six (186) implants with a mean follow up period of 5.48 years (0.1 - 11.34 years) were included. The 11.3-year cumulative survival rate was 90.9%. Immediate implant placement (OR=2.75) (P=0.08) and immediate implant loading (OR=8.8) (P = 0.02*) indicated a higher risk of failure than late implant placement or loading. When combining both categories (Type 1A), an OR = 10.59 (p = 0.04*) for implant failure was found compared to category 4C. Implants placed following static - computer assisted implant surgery (S-CAIS) showed less risk of failure compared to free hand implant placement (OR = 0.18; 95% CI: 0.02-1.37) (P = 0.09). CONCLUSIONS The survival rate of implants placed in the anterior mandible was considerably low (90.9%). S-CAIS, late placement and conventional loading are protective factor against implant failure in the anterior mandible.