Sarah S. Horia, Khaled A. Salah Eddin, Mohamed M. Y. Khashaba And Ibrahim E. Shindy,

ABSTRACT
The Aim Of This Study Was To Evaluate The Comparative Effectiveness Of Arthrocentesis Using Two Different Materials ?saline Solution? And ?lactated Ringer Solution? In The Improvement Of Reduced Mouth Opening And In Pain Control In Patients Who Complained From Anterior Disc Displacement With Reduction. A Double Blinded Randomized Controlled Clinical Study Included Patients With Unilateral Anterior Disc Displacement With Reduction. The Main Variables Were Maximal Mouth Opening Distance That Was Measured By Digital Caliper In Mm, And Pain Severity That Was Assessed At Different Follow Up Periods Using A Visual Analog Scale. The Saline Group Showed A Significantdifference With (p= 0.002), And The Lactate Ringer Group Got A Significantdifference With (p= 0.009). There Was Improvement In Maximum Mouth Opening And TMJ Pain Immediately Postoperatively, After 6 And 12 Weeks. There Was No Significantdifferences In Results Of Both Groups. The Saline Group Showed A Significantdifference From Preoperative Till 12 Weeks With (p= 0.010). The Saline Solution Was Found To Be Effective And Similar To The Lactate Ringer Solution In Treating Patients With Anterior Disc Displacement With Reduction.