Comparison of autologous platelet concentrates and topical steroids on oral lichen planus: a systematic review and meta-analysis.

Background: Oral lichen planus is a chronic and potentially malignant disorder of oral mucosa. Corticosteroids are used as first-line therapy for oral lichen planus patients; however, they have many side effects. Platelet concentrates (platelet-rich plasma and platelet-rich fibrin) are autologous bioactive materials.