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. 2023 May;34(5):463-474.
doi: 10.1111/clr.14052. Epub 2023 Mar 5.

Implant survival in the anterior mandible: A retrospective cohort study

Ignacio Pedrinaci  1   2 , Teresa Chanting Sun  3   4 , Mariano Sanz-Alonso  2   5 , Javier Sanz-Esporrin  2   5 , Adam Hamilton  1   6 , German O Gallucci  1
Affiliations

Implant survival in the anterior mandible: A retrospective cohort study

Ignacio Pedrinaci et al. Clin Oral Implants Res. 2023 May.

Abstract

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.

Materials and methods: Patients with implant-supported restorations of single or multiple teeth in the anterior mandible restored with fixed partial implant-supported restorations were evaluated. 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 108 patients and 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 = .08) and immediate implant loading (OR = 8.8) (p = .02*) indicated a higher risk of failure than late implant placement or loading. When combining both categories (type 1A), an OR = 10.59 (p = .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 freehand implant placement (OR = 0.18; 95% CI: 0.02-1.37) (p = .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.

Keywords: computed assisted surgery; conventional implant loading; implant failure; late implant placement; mandible; risk indicators; survival rate.

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