repeated injuries to the mucosa-cheek can cause non healing ulcer, which usually get infectd. the chances cancer also there but very less. the treatyment is removal the problematic teeth-which you have done already. the ulcer/ injury
not healing even after antibiotics, you should undergo for biopsy-tissue remval from that area . please show to the oral surgeon, so that he/she can advise you how to prevent further injuries by changing chewing methods.