Efficacy of 200mg and 300mg Concentrates of Green Tea Polyphenols Using Buccal Tablets Versus Topical Application of Corticosteroids in Treatment of Patients With Symptomic Oral Lichen Planus Randomized Clinical Trial

* Each patient was informed about the detailed procedure, and educated about benefits of the treatment, the known side effects and follow-up appointments needed. After that, each subject participating in the study signed an informed written consent form. * Subjects were given freedom to leave the study at any time when they need to. Group A (Experimental group) 200 mg green tea Where patients in this group will receive a buccal tablet containing 200 mg of green tea extract which adheres to the buccal mucosa slowly releasing the polyphenoles along around 8 hours 2 times aday for four weeks. Preparation of buccal tablets : Mucoahesive buccal tablets is prepared by a direct compression procedure. Various batches are prepared by varying the chitosan:drug ratio to identify the most effective formulation. The mucoadhesive drug/polymer mixture is prepared by homogeneous mixing of the drug with chitosan , secondary polymer, and D-mannitol, in a glass mortar for 15 min. Then, Mg stearate will be added and mixed for 5 min .The mixture is compressed using a tablet machine (Type EK: O.Erweka apparatus, Frankfurt, Germany) using flat-tip punches and dies with 8-mm-diameter. Each tablet weighed 212 mg with a thickness of 3.1 mm.( Darwish and Elmeshad,2009) Group B (Experimental group) 300 mg green tea Where patients in this group will receive a buccal tablet containing 300 mg of green tea extract which adheres to the buccal mucosa slowly releasing the polyphenoles along around 8 hours 2 times aday for four weeks. Group C (Control group) corticosteroid group: Where patients are treated with topical corticosteroids 1 mg/g Triamcinolone acetonide (Kenacort-A orabase 20 G Pomad: Deva dermatological product,Turkey) applied topically 4 times a day i.e. following each meal and at bed time for four weeks .