Temporomandibular joint (TMJ) disorders are health conditions that can occur at any age and are recognized as the most common cause of chronic pain, affecting 5-12% of the population. Pain in the TMJ region can lead to limitations in mouth opening and lateral movements of the mandible. In cases where conservative treatments are insufficient for TMJ disorders and osteoarthritis, symptoms can be alleviated through arthrocentesis, a minimally invasive procedure with a low risk of complications, or through various intra-articular injection applications following arthrocentesis. This study aims to compare the clinical efficacy of intra-articular applications of platelet-rich plasma (PRP) and autologous conditioned serum (ACS), both derived from the patient's own blood, in order to evaluate their impact on treatment outcomes and their potential role in enhancing patient care in routine clinical practice.