Question: Which of the following statements is not true regarding Arthrocentesis and manipulation for TMJ? Need Assignment Help? A. To treat anteriorly displaced disc/closed lock unresponsive to conservative measures. B. 80% success in studies. C. Is done under LA or GA. D. The joint is washed out and adhesions freed (lysis and lavage). E. Medications placed: triamcinolone for pain and arthritic change; bupivacaine for pain; hyaluronic acid to aid in closed block.