Quintuple Intra-Articular Hyaluronic Acid (HA) Improves and Platelet-Rich Plasma (PRP) Does Not Affect Mandibular Mobility in Temporomandibular Joint (TMJ) Disorders: A Controlled Trial

This study was designed as a two-arm equal-allocation clinical trial with a non-concurrent active treatment control. The study group consisted of consecutive patients receiving PRP injections into the TMJ cavities. The control group consisted of the same number of patients who received HA according to the same protocol. Controls were recruited consecutively, men and women separately, to maintain a consistent male-to-female ratio. The main condition for recruitment was the diagnosis of TMJ pain by a specialist in orthodontics or dental prosthetics and, on this basis, a referral for injection treatment. TMJ pain was diagnosed under the ICOP 2020 guidelines. The treatment was performed at the Maxillofacial Surgery Clinic in Kielce, Poland. The study group received PRP from peripheral venous blood of the elbow bend centrifuged at 160 revolutions per minute for 5 minutes with iFuge D06 (Neuation Technologies Pvt. Ltd, Gujarat, India). The control group received 2% hyaluronic acid Synocrom Forte (Croma-Pharma GmbH, Leobendorf, Austria). In both groups, 0.4 mL of the solution was injected per joint.