Migration of the uncemented CLS acetabular component

Davies, M. S., Parker, B. C., Ward, D. A., Hern, E., Hua, Jia and Walker, P. S. (1999) Migration of the uncemented CLS acetabular component. Orthopedics, 22 (2) . pp. 219-222. ISSN 0147-7447 (doi:10.3928/0147-7447-19990201-11)


The migration of uncemented press-fit CLS (Cementless Total Hip Replacement System) acetabular cups was measured retrospectively from standard anteroposterior pelvic radiographs using a digitizer and software specifically developed for this study. A radiographic and clinical review also were undertaken. There were 96 patients in the study group. The mean follow-up for radiographic review was 2.23 years, and the mean follow-up for clinical review was 3 years. Migration was measured in the cranial and medial directions. Mean migration of the cup at 2 years was 1.35 mm in the cranial direction and 2.15 mm in the medial direction. Radiographic appearances altered little over the study period. Fifty-five (57.3%) patients demonstrated bone ingrowth onto the prosthesis, predominantly in DeLee and Charnley zone 1. Twenty-one patients demonstrated nonprogressive sclerotic lines; no lucent lines were encountered. Statistical analysis showed a significant correlation between acetabular ingrowth and reduced cup migration in the medial direction (P = .011 at 5 years). There was no statistical relationship between migration of the cup and radiographic features or clinical outcome.

Item Type: Article
Research Areas: A. > School of Science and Technology > Natural Sciences > Biophysics and Bioengineering group
Item ID: 16589
Useful Links:
Depositing User: Jia Hua
Date Deposited: 29 May 2015 14:13
Last Modified: 30 May 2019 18:32
URI: https://eprints.mdx.ac.uk/id/eprint/16589

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