###Human: My metal crown has become sharp and cuts tongue. What to do? ###Assistant: Hello.  I have been through your query and I can understand your concern. The metallic restoration or crown when placed needs to be in harmony with the occlusion or the bite of the mouth. However, sometimes with due course of time what happens is that the crown gets disharmonious due to the continued masticatory forces of teeth and jaw. Sometimes, even the fractured part of the metal crown makes it sharp. This might lead to discomfort or even sometimes impinging to the soft tissues. You do not need to worry as it can be treated by trimming the sharply pointed surface. I would advise you to have a visit to your nearest dentist and get the occlusion checked. He would either go for trimming of sharp point in order to relieve you or if there might be any other problem underlying the cause, he would rectify that so it might not happen in the near future again. I would also advise you to have good oral hygiene and brush your teeth twice daily and floss regularly. Also, make a routine dental check-up six months in order to maintain your good condition of teeth and be evaluated of any problem in the earliest.