<s>[INST] Hi, I am 18 years old. I weigh about 165lbs and 511. I am concerning about my loose tooth. Nearly two years ago, I had a root canal done on my upper tooth, that is like 4th to last. After I had the root canal done, the dentist filled it. A year later, the filling fell out. A few months later, a small piece of my tooth fell out. Then 3 days ago, I felt minor pain in the tooth area, and my tongue touched the tooth and my tooth moved. Now it is loose. Its like a flat piece thats conneced to the gum. Its kind of hard to eat. Ive been eating on one side, and I eat with mouth open because it feels more safer. I couldnt make it to a dentist because I have no Medi-Cal in CA or Medicaid, and I wont get it back soon because I have to apply for it and itll take some time. [/INST] Thanks for your query, I have gone through your query. The mobile tooth could be because of the fractured tooth piece or because of the bone loss around the root canal treated tooth. The pain could be because of the movement of the fractured fragment or tooth, that applies pressure over the nerve endings and results in pain. Consult an endodontist and get a radiograph done, if sufficient tooth structure and bone support is there, then it can be restored with crown. If sufficient tooth structure is not there then it has to be extracted. You can take a course of antibiotics and analgesics like amoxicillin 500 mg and metronidazole 400 mg TID for 5 days (if you are not allergic). I hope my answer will help you, take care. </s>