Soft tissue thickness evaluation in screw-retained crowns by the biologically oriented preparation technique (BOPT)

Abstract

Background: Intraoral scanner evaluation (3Shape, TRIOS®) of soft tissue thickness around convergent collar implants and shoulderless abutments. Material and methods: Ambispective longitudinal analytical study with a sample size of 26 implants in 17 patients treated in a private dental clinic. Patients were divided into two groups: Prama Implants or group 1 (n=19) and Shelta implants combined with XA abutment or group 2 (n=7). Thickness changes after one- and two-year follow-up were analyzed. Results: In group 1 baseline mean thickness was 6.53 mm (±1.06) and follow-up mean thickness was 8.06 mm (±0.98), in group 2 initial mean thickness was 7.66 mm (±1.09) and follow-up mean thickness was of 8.42 mm (±1.03). Conclusions: Biologically guided crowns design seems to significantly increase the soft tissue volume around convergent morphology implants.