Migration of the uncemented CLS femoral component

Davies, M. S., Parker, B. C., Ward, D. A., Hua, Jia ORCID: https://orcid.org/0000-0003-3558-2058 and Walker, P. S. (1999) Migration of the uncemented CLS femoral component. Orthopedics, 22 (2) . pp. 225-228. ISSN 0147-7447 [Article] (doi:10.3928/0147-7447-19990201-12)

Abstract

The migration of uncemented CLS (Cementless Total Hip Replacement System) femoral stems was measured retrospectively from standard anteroposterior pelvic radiographs using a digitizer and software specifically designed for this study. The study population was comprised of 117 patients with 126 uncemented CLS femoral stems. All radiographs were reviewed and the incidence of thigh pain obtained by means of a questionnaire. The mean clinical follow-up was 3 years and the mean follow-up for radiographic review was 2.77 years. The mean femoral stem migration was 2 mm at 2 years and 3.66 mm at 7 years. Radiographic features varied little with no specific predictive features in patients with excessive early migration or those who complained of thigh pain. There was no statistical relationship between the presence of thigh pain and femoral stem migration.

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