Document Detail

The effects of different weight-bearing regimes on press-fit cup stability: a randomised study with five years of follow-up using radiostereometry.
MedLine Citation:
PMID:  22143314     Owner:  NLM     Status:  MEDLINE    
PURPOSE: There is little evidence to support immediate weight bearing after uncemented total hip arthroplasty (THA).
METHODS: 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.
RESULTS: At five years, we found no difference in micro-motion 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.
CONCLUSIONS: 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.
Olof Wolf; Per Mattsson; Jan Milbrink; Sune Larsson; Hans Mallmin
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2011-12-07
Journal Detail:
Title:  International orthopaedics     Volume:  36     ISSN:  1432-5195     ISO Abbreviation:  Int Orthop     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-26     Completed Date:  2012-07-19     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  7705431     Medline TA:  Int Orthop     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  735-40     Citation Subset:  IM    
Surgical Sciences, Orthopaedic, Uppsala, Sweden,
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MeSH Terms
Arthroplasty, Replacement, Hip / instrumentation*,  methods*,  rehabilitation
Early Ambulation
Hip Joint / physiopathology,  radiography,  surgery
Hip Prosthesis*
Middle Aged
Osteoarthritis, Hip / surgery*
Prosthesis Design*
Prosthesis Failure
Radiostereometric Analysis
Stress, Mechanical
Treatment Outcome
Weight-Bearing / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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