The root membrane technique: A retrospective clinical study with up to 10 years of follow-up

Konstantinos D. Siormpas, Miltiadis E. Mitsias, Georgios A. Kotsakis, Isaac Tawil, Michael A. Pikos, Francesco G. Mangano

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Purpose: 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. Methods: 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. Results: 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 (632.5). 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%. Conclusions: Within the limits of the retrospective design, the root membrane technique showed long-term success rates comparable to those of conventional immediate implants.

Original languageEnglish (US)
Pages (from-to)564-574
Number of pages11
JournalImplant Dentistry
Issue number5
StatePublished - 2018
Externally publishedYes


  • Bone preservation
  • Bone resorption
  • Immediate implants
  • Success
  • Survival

ASJC Scopus subject areas

  • Oral Surgery


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