Patients with half broken teeth will generally be divided into two cases of exposed nerve and no exposed nerve, the repair method mainly has the following points: 1, if the exposed nerve will need to do root canal treatment, root canal treatment is done after the remaining tooth body if still enough crown repair, you can directly do fixed crown repair, is commonly known as braces; exposed nerve after the remaining tooth body is not enough to support the direct crown, you need to do root canal treatment, and then pile After the nerve is broken, the remaining tooth body is not enough to support the direct crown restoration, you need to do root canal treatment first, then pile, then restore the general shape of the tooth to carry enough power for the crown, then do the crown, commonly known as pile crown restoration; 2, after half broken without nerve, you can confirm the tooth pulp is not a problem by detecting the vitality of the pulp, and do direct crown restoration or inlay restoration; 3, decayed teeth or pathologically damaged teeth, usually need to clean the decayed part, and then look at the remaining tooth body tissue, if it can carry If it is able to carry the cemented shape, high inlay restoration can be done.