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Implant Dent. 2018 Oct;27(5):564-574. doi: 10.1097/ID.0000000000000818.

The Root Membrane Technique: A Retrospective Clinical Study With Up to 10 Years of Follow-Up.

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Private Practice, Larissa, Greece.
Private Practice, Athens, Greece.
Lecturer, Divison of Periodontology, School of Dentistry, University of Minnesota, Minneapolis, MN.
Private Practice, Brooklyn, NY.
Private Practice, Palm Beach, FL.
Lecturer, Department of Medicine and Surgery, Dental School, University of Varese, Varese, Italy.



Immediate implant placement in conjunction with intentional root retention is a recently introduced technique, but the majority of existing documentation is limited to short-term reports with low level of evidence. Hence, the aim of this study was to document the long-term clinical and radiographic results of the root membrane technique.


This retrospective study reports on clinical results of the root membrane technique for periodontal ligament-mediated immediate implant placement with up to 10 years of follow-up from 3 private dental practices. Anterior implants placed with immediate loading from January 2006 to December 2016 were assessed. Kaplan-Meier estimators were computed for reporting of implant success and survival.


A sample of 182 patients (82 men and 100 women, age range: 18-83 years) received 250 immediate implants (230 maxilla, 20 mandible) after the root membrane concept and followed-up for a mean of 49.94 months (±32.5). Overall, 5 implant failures were recorded for a 10-year cumulative patient-level implant survival rate of 96.5%. Considering mechanical and biological complications, the 10-year cumulative implant success rate was 87.9%.


Within the limits of the retrospective design, the root membrane technique showed long-term success rates comparable to those of conventional immediate implants.

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