There is a hole in the big tooth and a painful sensation appears. Most of the cases are caused by pulpitis due to tooth decay. In this case, we should analyze the specific problem and make treatment for it, first of all, we can take dental film to check the extent and depth of the cavity, whether it has completely penetrated the tooth tissue and reached the pulp. Then we can apply the power system of dentistry, that is, turbo drill, to remove the decayed part as much as possible, if the pulp is exposed in the process of removal. Then you can consider the root canal treatment of the tooth directly, and apply the crown restoration to protect this tooth after the root treatment. However, if the decay removal process is done and the pulp is found to be not completely exposed afterwards. In this case, the tooth can be soothed by applying medication to the area adjacent to the pulp and then observing for a period of time to see if there are any painful symptoms. If there is no pain, then a permanent filling can be considered. If the pain persists, the tooth should be treated with a root canal directly after pulpotomy and the tooth should be protected with a crown restoration.