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Biomechanical effects on osseointegration of implants in a weight‐bearing animal model
Author(s) -
Müller R. T.,
Lederer M.,
Pingsmann A.,
Schmidt R.
Publication year - 1999
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/(sici)1521-4052(199912)30:12<832::aid-mawe832>3.0.co;2-j
Subject(s) - osseointegration , implant , biomechanics , biomedical engineering , materials science , anatomy , medicine , surgery
Macrostructured femoral stem prostheses (cobalt‐chrome alloy) were implanted in a weight‐bearing dog model in order to study implant osseointegration as a function of biomechanical bone loading conditions. Time until sacrifice was 6 months in almost all dogs. 5 implants showed roentgenologically proximal new bone formation. In accordance to a distal force transmission to the bone of a stiff femoral implant 13 of 16 stems demonstrated an extensive distal new bone formation with a microradiographical and microscopical stable fixation of the distal tip of the implant without lucent lines. Proximally as well osseous integration as a circumferential fibrous tissue encapsulation lead to bone atrophy. The results prove that osseointegration depends as well on loading conditions as on biocompatibility.