Tooth root bad black may be root surface caries, if the pulp is not involved, then fill and repair, if it has caused pulp inflammation, then root canal treatment, followed by restorative treatment, specific as follows.
1. Caries has not involved the pulp: remove the disintegrated and discolored tooth tissue due to caries, use glass ionomer to fill the tooth defect, because of the special location of root surface caries, it is easy to have secondary caries after filling, glass ionomer has good sealing of the edge, and it can release fluoride ions to promote the remineralization of the demineralized tooth tissue.
2. Caries has caused pulp inflammation: need to first root canal treatment, control pulp inflammation, prevent periapical lesions or promote the healing of periapical lesions, and then you can choose to repair the dental defects, such as metal porcelain crowns, all-porcelain crowns and so on.
There may be other reasons why the root of the tooth is broken and darkened, and it is recommended to go to a regular medical institution to receive professional treatment.