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Volume 25 , Issue 6
November/December 2005

Pages 615621

Histologic Analysis of a Failing Three-Part Dental Implant: A Human Case Report

Luca Landi, DDS, CAGS / Paolo Francesco Manicone, DDS / Stefano Piccinelli, DDS / Roberto Raia, DDS

PMID: 16353536
DOI: 10.11607/prd.00.0663

Two failing implants were removed for prosthetic reasons from the maxilla of a 60-year-old woman. The implants were clinically immobile but presented clear signs of peri-implant mucositis and bone destruction. One of the two implants was harvested together with the surrounding bone and analyzed histologically. The implant was threaded and consisted of three distinct components screwed together in a telescopic fashion. Histologically, bone loss reached the fourth thread, while apical to the fourth thread, osseointegration between the host bone and the implant surface was recognizable. The implant parts were not completely seated into each other, and the resulting gap was colonized by host bone. Newly formed alveolar bone penetrated deep into the implant body cavity and appeared similar in nature to the alveolar bone surrounding the implant. Histologic findings are discussed in reference to the ability of such an implant to withstand biomechanical loading over time.
(Int J Periodontics Restorative Dent 2005;25:615621.)

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