الفهرس 
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Abstract
The aim of the study is to evaluate the effect of 980nm Diode Laser in the treatment of erosive OLP compared with conventional topical corticosteroid therapy.
Primary Objective
To evaluate clinically on Visual Analogue Scale (VAS) the ability of 980nm Diode Laser to control pain compared with topical corticosteroid.
Secondary Objective
To test the clinical improvement of OLP according to Thongprasom et al 2003 scoring system and to evaluate the oxidative stress in saliva biochemically.