Dental Implants Research Today is a free monthly online journal that collates and summarizes the latest research about Dental Implants, including details on dentistry, surgery, tooth implants.

Peri-Implant Bone Loss Around Posterior Mandible Dental Implants Placed After Distraction Osteogenesis: Preliminary Findings.

Polo WC, de Araujo NS, Lima YB, Joly JC, Sendyk WR, Cury PR

* Department of Periodontics and Implantology, School of Dentistry, University of Santo Amaro, São Paulo, SP, Brazil., † Department of Oral Pathology, University of São Paulo, São Paulo, SP, Brazil., ‡ Department of Biochemistry, São Leopoldo Mandic Dental Research Institute, Campinas, SP, Brazil., § Department of Periodontics, São Leopoldo Mandic Dental Research Institute.

Background: The present study evaluates implant survival and peri-implant bone loss around posterior mandible dental implants placed at sites of distraction osteogenesis. Methods: On removal of the distraction devices, 34 dental implants were inserted into 14 posterior mandible sites in 10 healthy, non-smoking female patients. Prosthetic treatment was performed 4 months after implant placement using fixed implant prostheses. After 6 to 16.5 months, periapical radiographs were taken and evaluated for peri-implant bone loss and radiolucency. The distance between the implant margin and the first visible bone-implant contact was measured on the mesial and distal aspects of the implants using imaging software. Radiographic dimensional distortion was corrected as a function of the known true dimension of the implant. Results: Of the 34 implants placed, two (5.9%) failed to integrate at reentry surgery. Both were replaced and restored during the course of the study so that a total of 34 implants was followed for 12.1 +/- 3.8 months post-restoration and 16.1 +/- 3.8 months post-insertion. Mean loss of marginal bone height was 2.6 +/- 1.0 mm. During the follow-up period, radiolucent lines along the implant surface were absent. Conclusions: The mean peri-implant bone loss in areas of alveolar bone distraction was 1.9 mm/year. A high implant survival rate was observed.

Published 5 February 2007 in J Periodontol, 78(2): 204-208.
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