Subsidence in Collarless Corail Hip Replacement

Veenesh Selvaratnam*, Vishwanath Shetty , Vishal Sahni
Southport & Ormskirk NHS Hospital Trust, Liverpool, L1 8LP, UK

Article Metrics

CrossRef Citations:
Total Statistics:

Full-Text HTML Views: 1200
Abstract HTML Views: 603
PDF Downloads: 326
Total Views/Downloads: 2129
Unique Statistics:

Full-Text HTML Views: 718
Abstract HTML Views: 330
PDF Downloads: 262
Total Views/Downloads: 1310

Creative Commons License
© Selvaratnam et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Southport & Ormskirk NHS Hospital Trust, A1202, One Park West, 31 Strand Street, Liverpool, L1 8LP, UK; Tel: 07738222712; E-mail:


The purpose of this study was to assess whether subsidence occurs in collarless Corail hip replacement (CCHR) and to ascertain the extent and timing of subsidence if present. Retrospective case notes analysis was performed. Sixty eight patients who had CCHR were identified from our database. Male to female ratio was 32:36. Their mean age was 74.2 years (range 37-95 years). Indications for surgery were osteoarthritis in 64 (94%) patients, rheumatoid arthritis in two (3%) patients and avascular necrosis in two (3%) patients. Subsidence was measured at 6 weeks, 6 months and 1 year post-op compared to initial post-op x-rays. At 6 weeks x-ray 21 patients did not have any subsidence, 18 patients had 1 millimeter (mm) subsidence, 10 patients had 2mms subsidence, 4 patients had 3mms subsidence, 5 patients had 4mms subsidence, 1 patient had 5mms subsidence, 4 patients had 6 mms subsidence and 1 patient each had subsidence of 7mms, 9mms, 11mms, 13mms and 26 mms respectively. When compared with 6 months x-rays only 2 patients had a further subsidence of 2mms while another patient had 3mms subsidence. No further subsidence occurred at 1 year follow up x-rays. One patient had revision surgery due to symptomatic subsidence (29mms) at 6 months follow up. Subsidence does occur in the first 6 weeks in collarless Corail hip replacement, and to a lesser extent until 6 months postoperatively, but does not progress further.

Keywords: Collarless stem, corail stem, subsidence, femoral stem, uncemented stem, uncemented THR.