Abstract
We evaluated subchondral low signal intense abnormality on T1-weighted MRI in the osteoarthritis (OA) and osteonecrosis (ON) of the knee after tibial Condyle valgus osteotomy (TCVO). Subjects consisted of 11 OA patients, aged 71 on average (range: 66-79) and 3 ON patients, aged 59 on average (range: 46-72). The MRI follow-up period was 18 months (range: 12-25) in the OA group and 17 months (range: 12-24) in the ON group. Clinical improvement was observed in all patients. Except for one patient in the OA group, T1-weighted MRI showed low signal intense area in the medial compartment of the knee. At follow-up, the MRI evaluation revealed a decrease in the low signal intense areas in 9 of the 10 OA patients and in 2 of the 3 ON patients. These results suggest that bone remodelling of the subchondral lesion can be expected after decompression and stabilizing surgery, TCVO.
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