115 implants were inserted into fresh single root extraction sockets. The follow-up period ended at least 6 months after prosthetic treatment.

In this clinical multicenter study the results of titanium two-piece-implants (Straumann, Thommen) and zirconium-dioxide one-piece-implants (Z-Systems) were compared in terms of osseus and soft tissue findings. Titanium implants showed the best ratio of osseointegration (96/96.6% resp.) in comparison to zirconium-dioxide implants (72.7%), whereas all implants had a comparable success rate in terms of peri-implant soft tissue outcome at the end of the follow up period.

Conflict of interest: None declared.