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Femoral alignment o...
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Östgaard, Hans-Christian,1948Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
(författare)
Femoral alignment of the Charnley stem: a randomized trial comparing the original with the new instrumentation in 123 hips.
- Artikel/kapitelEngelska2001
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2009-07-08
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Medical Journals Sweden AB,2001
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LIBRIS-ID:oai:gup.ub.gu.se/55351
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https://gup.ub.gu.se/publication/55351URI
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https://doi.org/10.1080/00016470152846529DOI
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Deficient cement mantles are associated with aseptic loosening of the stem component of total hip replacement. In a former study of 206 Charnley stems, we found high frequencies of stem malalignment, especially on the lateral view, consequently resulting in a high percentage of low cement mantle grading. If the "true" lateral radiographic projection is not used, there is a risk that the frequency of mantle defects is underestimated. A logistic regression analysis showed a high correlation between low cement mantle grading and stem loosening after a mean follow-up of 10 years. The new Charnley instrumentation was introduced in 1994 and we started a randomized trial including 123 prostheses to determine whether the new instrumentation improved the position of the stem in both the AP and lateral planes. Postoperative radiographs revealed a significant change in AP positioning-i.e., from a high percentage of varus with the original method to valgus with the new instrumentation. However, there was no difference on the lateral view, with a persisting high frequency of stems with implant-inner cortex contact resulting in high percentages of low cement-mantle grading in both systems. If this deficiency, in a long-term perspective, is associated with aseptic loosening, as many authors have claimed, the manufacturers should address the problem.
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Helger, Lilliane,1957Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
(författare)
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Regnér, Hans,1923Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
(författare)
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Garellick, Göran,1948Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics(Swepub:gu)xgargo
(författare)
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Göteborgs universitetInstitutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi
(creator_code:org_t)
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Ingår i:Acta orthopaedica Scandinavica: Medical Journals Sweden AB72:3, s. 228-320001-6470
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