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Volume 8 , Issue 4
July/August 1993

Pages 409-414

Fractures of the Fixture Component of an Osseointegrated Implant

M. Jane Morgan, DDS, MSc/David F. James, PhD, PEng/Robert M. Pilliar, PhD, PEng

PMID: 8270309

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. (INT J ORAL MAXILLOFAC IMPLANTS 1993;8:409-414.)

Key words: endosseous dental implant, fatigue, fixture fracture, threaded implant

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