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Preliminary Study to Evaluate Marginal Bone Loss in Cases of 2- and 3-Implant-Supported Fixed Partial Prostheses of the Posterior Mandible

Segal, Pnina, DMD*; Makhoul, Areej, DMD; Eger, Michal, DMD; Lucchina, Alberta Greco, DDS§; Winocur, Ephraim, DMD*; Mijiritsky, Eitan, DMD

Journal of Craniofacial Surgery: June 2019 - Volume 30 - Issue 4 - p 1068–1072
doi: 10.1097/SCS.0000000000004855
Clinical Studies
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Purpose: The purpose of this study was to evaluate, by radiographic examinations, the marginal bone resorption around implants in cases of 2 and 3 implant-supported fixed partial prostheses (FPPs) at the posterior mandible.

Methods: A retrospective study of 41 patients (23 males, 18 females) of an average age of 67 years (range, 53–85), with 2 and 3 implants-supported FPPs in the posterior mandible that were treated during 2006 to 2015. The mean follow-up time was 6.32 years (range, 2–10). Twenty-four patients had FPPs on 2 implants (a total of 48 implants). Seventeen patients had FPPs on 3 implants (a total of 51 implants). Clinical and radiographic follow-up examinations were performed. All radiographs were analyzed for changes in marginal bone height surrounding the implants.

Results: The mean marginal bone loss around the most mesial implant was slightly higher in the 2-implant group (0.833 mm) compared with the 3-implant group (0.431 mm). The correlation between the mean marginal bone loss around the most mesial implant and the number of implants was of borderline value (P = 0.055).

Conclusions: Considering the limitations of this preliminary study, the authors found that the mesial implant in the 2-implant group is more susceptible to marginal bone loss.

*Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine

The Maurice and Gabriela Goldschleger School of Dental Medicine

Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel

§Università degli Studi del Piemonte Orientale, Novara, Italy

Department of Otolaryngology, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.

Address correspondence and reprint requests to Eitan Mijiritsky, DMD, Ehud 12, Tel-Aviv, Israel; E-mail: mijiritsky@bezeqint.net

Received 15 May, 2018

Accepted 18 June, 2018

The authors report no conflicts of interest.

© 2019 by Mutaz B. Habal, MD.