Following arthroscopic anterior cruciate ligament reconstruction, radio-opacities were noted on the post-operative radiographs in 40 of 50 consecutive cases. There was no correlation between the presence of these opacities and post-operative knee pain, joint effusion, arthrofibrosis or knee recovery. In 12 cases undergoing a subsequent radiograph between 3 and 18 months post-operatively, opacities were noted in only one case.
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