Stopped: Study staff was unable to collect proper samples to meet study goals
Previous studies have shown an increase in the concentration of mesenchymal stem cells (MSC's) in the setting of osteoarthritis of the knee and its correlation to severity. Researchers have shown that as there is an increase in the severity of the disease, the concentration of stem cells also increases. The purpose of this study is to determine if there is the same increase in stem cell concentration in patients with osteonecrosis (ON) of the femoral head.
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The quantity of mesenchymal stem cells present in the synovial fluid of patients with precollapse ON of the femoral head and postcollapse ON of the femoral head compared to patients without intraarticular hip pathology.
Timeframe: 24 months