 A new oral lichen planus scoring system will be evaluated for validity, reliability and sensitivity to change. This system will quantify the severity and amount of oral lichen planus lesions on a scale of 0 to 66. Validation of this scale is needed for future studies of oral lichen planus. The validity and sensitivity to change will be assessed by correlation of the scores with patient based outcomes as well as global scale. Inter- and intra-rater reliability will also be tested. 