Abstract
To evaluate the effect of arthrocentesis and sodium hyaluronate (SH) injections on nitrite, nitrate, and thiobarbituric acid-reactive substance (TBA-RS) levels in temporomandibular joint internal derangements. Arthrocentesis was performed on 10 patients, and 15 patients received a supplemental injection of SH after arthrocentesis. All these patients received an SH injection 15 days after the first intervention. The synovial fluid samples were obtained before arthrocentesis on the first appointment and before the SH injection 15 days later. Nitrite and nitrate levels were measured with a highly sensitive and specific chemiluminescence detection method, and the concentration of lipid peroxidation products was assessed by means of the thiobarbituric acid reaction. Symptomatic improvement was seen in both groups. Nitrite, nitrate, and TBA-RS levels only decreased significantly (P <.05) with a supplemental SH injection after arthrocentesis. Intra-articular injections of SH may reduce nitrite, nitrate, and TBA-RS levels that play a role in the pathogenesis of various temporomandibular disorders.
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