Root canal treatment needle broken in the root of the tooth, the harm is mainly based on the location of the broken needle, etc., may cause secondary infection, stimulation of periapical tissues, increase the difficulty of treatment and other hazards.
1. Secondary infection: During root canal preparation for root canal treatment, due to factors such as bending of the root, improper operation and fatigue of the instruments, the root canal file and other needles may break and remain in the root of the tooth. There may be infected material on the file that has not been cleaned up, which may lead to secondary infection of the root and aggravate apical inflammation.
2. Stimulation of periapical tissues: If the broken needle exceeds the working length of the root and exceeds the apical foramen, it may continue to irritate the periapical tissues, which may lead to chronic periapical inflammation, and it is necessary to take radiographs to confirm the location of the needle and then carry out apical surgery to take out the broken needle and continue to improve the endodontic treatment.
3. Increase the difficulty of treatment: If the location of the broken needle is in the middle and upper part of the root canal, and the infected material in the middle and lower part of the root canal and at the root tip of the tooth has not been removed, this situation will increase the difficulty of the subsequent endodontic treatment, and it is necessary to take out the broken needle and then carry on the treatment after the establishment of a bypass in the root canal.
4. Special case: If the broken needle is located in the middle and lower part of the root canal, and the inflammatory material has been basically removed, and the tooth does not have obvious discomfort, the broken needle can be treated as a root canal filling without special treatment, and the root filling operation can be continued after taking pictures and analyzing the broken needle.