Thanks for your query, I have gone through your query. The excess tissue which is getting caught between teeth could be because of the sharp cusp edges. Once the cheek gets traumatised, it will be prone to injury again and again. Get your sharp cuspal edges of the teeth rounded off. Do not delay, since you are telling you have leukoplakia and OSMF better to get it treated as early as possible. Get the excess tissue growth removed surgically. I hope my answer will help you, take care.