EffIcacy Between Arthrocentesis With High Versus Low Molecular Weight Hyaluronic Acid in Treatment of TMJ Disorders

The MEASUREMENT TOOL of the study will be carried out by 2 groups the first will be injected by high molecular weight hyaluronic acid and the second wil be injected by low molecular weight hyaluronic acid Then compare between Efectevness of injection of high-molecular weight versus Low moecular weight hyaluronic acid after two-needle arthrocentesis in improving the signs and symptoms of intra-articular TMJ disorder. , 1- significantly improving the pain on scale 1-10 , and 2-significant improvements in mouth opening range in mm by the distance between the edges of the frontal incisors with a ruler or caliper and joint noise. 3-The presence of absence of clicking and cracking in jaw .