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.
This cohort study aims to evaluate bone level around two new shapes of tissue level implants after the osseointegration period.
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.
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.
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.

EAO Congress 28th Annual Scientific Meeting