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International Orthopaedics

Erschienen in:

01.04.2012 | Original Paper

The effects of different weight-bearing regimes on press-fit cup stability: a randomised study with five years of follow-up using radiostereometry

verfasst von: Olof Wolf, Per Mattsson, Jan Milbrink, Sune Larsson, Hans Mallmin

Erschienen in: International Orthopaedics | Ausgabe 4/2012

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Abstract

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 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.

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.

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Titel: The effects of different weight-bearing regimes on press-fit cup stability: a randomised study with five years of follow-up using radiostereometry
verfasst von: Olof Wolf
Per Mattsson
Jan Milbrink
Sune Larsson
Hans Mallmin
Publikationsdatum: 01.04.2012
Verlag: Springer-Verlag
Erschienen in: International Orthopaedics / Ausgabe 4/2012
Print ISSN: 0341-2695
Elektronische ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-011-1413-5

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