Large modular metal-on-metal bearings in routine primary hip replacement .
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What advantage is there to be gained using large modular metal-on-metal bearings in routine primary hip replacement?
J Bone Joint Surg Br; 2011; 93(12): 1602-1609100 patients who underwent primary total hip replacement were randomized to receive a large-head metal-on-metal bearing on a stem for primary hip replacement or a 28 mm diameter conventional metal-on polyethylene bearing. The results from 2 year follow-up indicated that both groups displayed significant improvements in regards to function, pain, and hip scores. However, it was found that patients who received the metal-on-metal bearing displayed significantly better patient satisfaction. Lastly, it was found that the metal ion levels were above safety thresholds in 20% of patients in the metal-on-metal group.
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