Preliminary results of bone level around a new shape of tissue level implant

Abstract

Background : Tissue level implants help to put implant abutment connections in a shallow gingival position. Here the rough implant surface may be more protected from bacterial contamination.Aim/Hypothesis : This cohort study aims to evaluate bone level around two new shapes of tissue level implants after the osseointegration period.Material and Methods : A cohort group of 62 subjects n = 102 implants were systematically included during a 9 month period. Peri-implant bone level was assessed on a peri-apical radiograph after a 2 to 6 month osseointegration period. Implants were separated into two groups.Group 1-implants with a 1.5 mm height smooth surface collar ( n = 28) and group 2-implants with a 2.5 mm height smooth surface collar ( n = 74). Each periapical radiograph was re-scaled through cross multiplication based on the collar length measure, and the bone level position was measured mesially and distally.Results : Out of 62 treated patients, all were available for the follow-up. Peri-implant bone level change were respectively (+0.36 ± 0.79 mm, Group 1 vs + 0.94 ± 1.08 mm, Group 2 P < 0.001). Respective implant survival rates were 100 percent and 97.3 percent. Conclusion and ClinicalImplications : These preliminary results confirm that this new shape of Tissue Level Implant contributes to having a peri-implant bone level above the rough to smooth surface. Further studies may evaluate the long term outcome and determine ability to prevent peri-implantitis.