Effects of different weight bearing regimes on stability of press fit cups: A randomized study with 5 years of follow-up using radiostereometry
(English)Article in journal (Refereed) Submitted
There is little evidence supporting immediate weight bearing after uncemented THA. Thirty-seven patients with unilateral osteoarthritis of the hip received a press fit cup. They were randomized to immediate full weight bearing or partial weight bearing for 3 months. At 5 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 5 year follow-up period. To conclude, we found no adverse effects of immediate weight bearing after THA on stability of these press fit cups. Early mobilization might have other advantages.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-131035OAI: oai:DiVA.org:uu-131035DiVA: diva2:352483