Patient: Description (onset time, main symptoms, hospital, etc.): I just had a filling a few days ago, the filling area is very large without killing the nerve, the doctor said that you can not eat hard teeth will crack yesterday after the scaling, found that this tooth before and after a small gap, said the tooth is hidden crack, not pain, just a little sore in the cold not just because of the scaling or crack. I want to do a protective measure to save this tooth. Can I do a crown without a root canal, and can I do it if I have a weak tooth wall? I’m not sure if I can do it if the tooth is cracked, and I can’t save it. Shandong University Stomatological Hospital, Department of Restorative Dentistry Sun Huiqiang Shandong University Stomatological Hospital, Department of Restorative Dentistry Sun Huiqiang: Hello! If the filling material is cracked again, the preferred option is to fill it again, that is, to remove all the material from the last filling and fill it again with new material. As for whether the new filling material can stick firmly, it depends on the specific scope of your tooth defect, the degree of defect, as well as the materials and techniques chosen by the doctor to fill the tooth. But no matter what, the tooth must not be extracted, which means that the tooth can definitely be saved. If the filling material eventually fails to stick, the tooth can be saved by root canal treatment, piling, and porcelain crown restoration. For prices, please call the department’s pricing nurse.