Dental News - Retrospective analysis of periimplantitis therapy of 158 implants

Drs. Jörg-Ulf Wiegner, Hermann Klinsmann & Toralf Kömmling

Wed. 5. April 2017

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Objective: The objective of the retrospective analysis was to evaluate the efficacy of periimplantitis treatment up to a five-year observation period.

Materials and methods
Patients treated for periimplantitis between 2009 and 2015 were included. Before therapy, the patients underwent professional tooth cleaning, defect class diagnosis and thorough mechanical cleaning of the implant surface. In the case of intraosseous defects, a deproteinized bovine bone mineral and a native bilayer collagen membrane were used according to the concept of guided bone regeneration. Retrospectively, plaque index, full-mouth bleeding on probing and probing pocket depth were analyzed before the therapy and at recall visits up to 56 months after therapy.

Results
Out of 22,724 implants, 107 patients with 158 implants underwent periimplantitis therapy and these had been in place for nine months to 15 years. Fifteen implants (9.49%) had to be extracted despite therapy. Most of the periimplantitis infections had occurred within five years after implantation (108 implants; 68.4%). In 45 implants (28.5%), therapy had included guided bone regeneration. Before therapy, bleeding on probing was 100%. Bleeding on probing was absent in 50.0% of implants at 12 months and in 73.1% of implants examined 49–56 months post-therapy. Probing pocket depth was reduced from 4.92 ± 1.93 mm before therapy to 2.67 ± 0.88 mm after 12 months and remained stable up to 56 months post-therapy (2.71 ± 0.30 mm).

Conclusion
Using a treatment approach including a presurgical hygiene phase and considering the defect morphology, periimplantitis therapy was mostly successful in terms of implant survival (90.5%).

Editorial note: The full article was published in the 1/2017 issue of the Journal of Oral Science and Rehabilitation. It can be accessed free of charge at www.dtscience.com.

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