<s>[INST] My tooth feels loose at the bottom. I got up this morning and brushed my teeth and when I ran my toungue on the bottom row, one of them felt sharp on the bottom. I've noticed it before, and just recently went to the dentist and forgot to mention it, but he didn't notice it either. it feels worse today. Is it going to fall out. I have pretty straight teeth its jst the four bottom that aren't. [/INST] Hello,I assume you are concerned with the tongue side of your lower front near the gum tissue? You may have some recession and root exposure. This area can accumulate tartar quickly. This can be sharp or break off, leaving a rough edge. If your entire tooth feels loose or mobile, then I suspect bone loss. You should consider X-rays of this area and a periodontal evaluation. If you just had a routine exam and cleaning, you should contact your dentist and inquire about your periodontal health.if your teeth are sharp and chipping at the biting edge, then you may grind your teeth at night. This stress can damage enamel and the ligament holding the teeth in bone. Teeth can move with pressure. A night guard to protect your teeth is a suggestion. Have you had recent changes in the position of your lower teeth? Both grinding teeth and bone loss can cause this to occur.More details and a clinical exam would be helpful to further evaluate your dental condition. I am glad to answer additional questions. Thank you for your inquiry. </s>