Temporomandibular Joint Disorders causes pain and tenderness in your jaw joints and surrounding muscles and ligaments. Causes include teeth grinding, jaw injuries, arthritis and everyday wear and tear. TMJ treatment varies from person to person and may include medication, physical therapy, custom mouth guards and jaw surgery. Temporomandibular joint (TMJ) implants are intended to be surgically implanted in the jaw to replace the temporomandibular joint. A variety of artificial materials have been used to partially or totally replace the TMJ, including plastics, Teflon, silicone, metals, and a combination of these materials. TMJ disorders are a group of more than 30 conditions that cause pain and dysfunction in the jaw joint and muscles that control jaw movement.