Spoke to the specialist surgeon regarding my dentist’s concerns and he does not think a biopsy is warranted at this point in time. For the moment I have a list of suspicious changes to keep an eye out for, and instructions to call him immediately if I notice any of them, but he suspects the most likely cause is a callus from repeated biting. To be fair, my dentist has been recommending a splint to relieve the biting for literally 10 years, it just so happens to cost $700 which I quite simply do not have.