Abstract
ObjectiveTo determine if subchondral bone damage can influence the clinical results of intraarticular platelet-rich-plasma (PRP) treatment in knee osteoarthritic patients. Material and methodsA retrospective review of patients treated with intraarticular PRP injections for knee osteoarthritis who previously underwent a Magnetic Resonance (MR) of the knee was performed. Visual Analogic Score (VAS) was assesed for pain, whereas WORMS MR score was adapted to assess the damage to the subchondral bone (WORMSsc score). ResultsSixty-one patients were treated with 3 weekly injections of PRP. Mean VAS reduction was 27.67±13.13 points (P<.005). WORMS sc mean score was 32±18.5 points. NO correlation between WORMSsc and VAS was found. A moderate correlation between WORMSsc score and Preoperative VAS was found (r=.43; P<.005). ConclusionThere is no correlation between the damage to the subchondral bone assesed by MR and pain relief at 12 weeks in patients treated with intraarticular platelet-rich plasma in patients with knee osteoarthritis. A greater damage to the subchondral bone could be associated with more pain.
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