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Joint Space Narrowing After Partial Medial Meniscectomy in the Anterior Cruciate Ligament–Intact Knee

Dr. Shelbourne is Orthopaedic Surgeon, The Shelbourne Knee Center, Indianapolis, IN. Dr. Dickens is Graduate, Indiana University School of Medicine, Indianapolis.

Neither the following authors nor the departments with which they are affiliated has received anything of value from or owns stock in a commercial company or institution related directly or indirectly to the subject of this article: Dr. Shelbourne and Dr. Dickens.

Reprint requests: Dr. Shelbourne, The Shelbourne Knee Center, Suite 530, 1815 North Capitol Avenue, Indianapolis, IN 46202.

Osteoarthritis of the knee is common after total medial meniscectomy. In anterior cruciate ligament–intact knees, the reported outcomes of partial medial meniscectomy are variable. Radiographic assessment using a posteroanterior weight-bearing view is a reliable tool for detecting minor medial joint space narrowing, which may be an early sign of osteoarthritis. Studies that assessed the effect of partial medial meniscectomy found a low percentage of patients with >50% joint narrowing at 10 to 15 years after surgery. Digital radiography, using a posteroanterior weight-bearing view, is a highly sensitive method for observing minor joint space narrowing in the involved knee. A recent study showed that 88% of patients who underwent partial medial meniscectomy had joint space narrowing of <2 mm, and none had narrowing 2 mm, at a mean follow-up of 12 years. Subjective results after partial medial meniscectomy are favorable, with 88% to 95% of patients reporting good to excellent results.

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