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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 8 (1993), No. 4     1. July 1993
Int J Oral Maxillofac Implants 8 (1993), No. 4  (01.07.1993)

Page 409-414


Fractures of the Fixture Component of an Osseointegrated Implant
Morgan, M. Jane / James, David F. / Pilliar, Robert M.
The cause of mechanical failure of the fixture component of an osseointegrated dental implant was investigated. The surfaces of five clinical specimens that had fractured were compared to those of new specimens fractured in the laboratory under monotonic and cyclic loads. Scanning electron microscopy revealed striations on the fractured surfaces of the clinical specimens, similar to striations on the laboratory-fatigued specimens and in contrast to the dimpled surfaces on the overloaded specimens. The investigation demonstrated that fractures of the fixture component of this dental implant occurred by fatigue under physiologic loads, with marginal alveolar bone loss around the fixture.

Keywords: endosseous dental implant, fatigue, fixture fracture, threaded implant