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The purpose of the work was to determine the concentrations of mineral elements in subchondral bone and synovial fluid of patients with degenerative dystrophic knee joint diseases accompanied by articular surface defects. Subchondral bone and synovial fluid were used as a study material. Analysis of mineral content indices included the determination of calcium, phosphate, magnesium and chlorides concentrations by spectrophotometry. It was shown that the indices of basic electrolytes, i.e. of calcium and phosphate ions, in bone and synovial fluid did not correlate with each other and changed in different directions. Calcium content decreased in the bone while phosphate ions - in synovial fluid.

State of Synovial Medium in Patients with Degenerative Dystrophic Changes of Knee Joint Accompanied by Articular Surface Defects