question: Hi doctor, My upper incisor has a fracture. So, I had a temporary crown and then a couple weeks later I had a root canal completed. And today, I had my crown lengthening done to prepare for the permanent crown. My dentist mentioned to me that I would feel a hole in the back of my tooth, which I do. And that it would even heal over. But, what does that mean? And how long does it take? I am worried about food particles, etc., getting in there and infecting the area. I was given mouth rinse, T3 and Ibuprofen 600 mg. I would like to know if this is all normal. Should I be worried about infection of the hole?