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Failed femoral stems in total hip prostheses. A report of six cases
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Failed femoral stems in total hip prostheses. A report of six cases
Failed femoral stems in total hip prostheses. A report of six cases
JG
Jo Galante
Jo Galante
WR
W Rostoker
W Rostoker
JD
Jm Doyle
Jm Doyle
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1 March 1975
journal article
Published by
Wolters Kluwer Health
in
The Journal of Bone & Joint Surgery
Vol. 57
(2)
,
230-236
https://doi.org/10.2106/00004623-197557020-00017
Abstract
The time of the study. Reoperation and replacement of the femoral component was required in all six cases. Metal fatigue appeared to be the cause of failure in all instances. Metallographic examination of the removed prosthesis revealed no underlying defects in one prosthesis. In the other five prostheses metallurgical defects were found. Varus placement of the femoral prosthesis or loosening of the cement-prosthesis bond, or both, were identified in five of the six and were thought to have led to overload. A combination of metal defects and loosening or malpositioning was thought to be responsible for the failures. It was further indicated that current designs should be regarded as marginal in relation to long service life, until more fatigue information is available on the metallic materials currently in use. Six femoral stems of total joint prostheses failed and were studied. These included two short-neck Muller, one standard Muller, one new design long-neck Muller, and two Charnley prostheses. In addition, reference is made to another failed Charnley prosthesis which had not required revision at the time of the study. Reoperation and replacement of the femoral component was required in all six cases. Metal fatigue appeared to be the cause of failure in all instances. Metallographic examination of the removed prosthesis revealed no underlying defects in one prosthesis. In the other five prostheses metallurgical defects were found. Varus placement of the femoral prosthesis or loosening of the cement-prosthesis bond, or both, were identified in five of the six and were thought to have led to overload. A combination of metal defects and loosening or malpositioning was thought to be responsible for the failures. It was further indicated that current designs should be regarded as marginal in relation to long service life, until more fatigue information is available on the metallic materials currently in use. Copyright © 1975 by The Journal of Bone and Joint Surgery, Incorporated...
Keywords
NECK
DEFECTS
LOOSENING
PROSTHESIS
SIX
PROSTHESES
FEMORAL
MULLER
STEMS
CHARNLEY
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Cited by 59 articles