The effects of different weight-bearing regimes on press-fit cup stability: a randomised study with five years of follow-up using radiostereometry
2012 (English)In: International Orthopaedics, ISSN 0341-2695, E-ISSN 1432-5195, Vol. 36, no 4, 735-740 p.Article in journal (Refereed) Published
There is little evidence to support immediate weight bearing after uncemented total hip arthroplasty (THA).
Thirty-seven patients with unilateral osteoarthritis of the hip received a press-fit cup. Cup stability was assessed with radiostereometry (RSA) over five years. Patients were randomised to immediate full weight bearing, or partial weight bearing for three months.
At five years, we found no difference in micromotion as assessed with radiostereometry. Numerically, there was more proximal translation and increased inclination with immediate weight bearing, but these values barely exceeded the precision limit for the method. Pooled data for the two groups revealed translations of 0.1-0.3 mm and rotations of 0.2-0.3° over the five year follow-up period.
We found no adverse effects of immediate weight bearing after THA in relation to stability of these press-fit cups. Early mobilisation might have other advantages.
Place, publisher, year, edition, pages
2012. Vol. 36, no 4, 735-740 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-164687DOI: 10.1007/s00264-011-1413-5PubMedID: 22143314OAI: oai:DiVA.org:uu-164687DiVA: diva2:468999