Osmic Acid Versus Yttrium-90 in Rheumatoid Synovitis of the Knee

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Abstract
The effectiveness or osmic acid and yttrium-90 in the treatment of synovitis of the knee in rheumatoid arthritis is compared in 126 patients followed-up for 3 years. Ninety-one knees were injected with osmic add and eighty-four knees with yttrium-90. Osmic add appeared to be more effective than yttrium-90 throughout the period of the follow-up but the difference only reached statistical significance (p<0.05) at 3 years. Both therapies were well tolerated by patients and should be considered as an alternative to operative synovectomy.