When a tooth becomes black, consider caries or pulp necrosis.
1. Caries: In bacteria and other reasons, the hard tissue of the tooth body is damaged, caries, caries part of the show into a large number of black decayed tissue, the teeth look black, you need to use professional tools to remove the black decayed tissue, and then crown restoration and other further treatment.
2. Pulp necrosis: teeth by trauma, caries and other factors of stimulation, the pulp tissue is infected by degeneration and necrosis, the tooth lost blood supply, pulp hemoglobin degeneration and decomposition, the tooth as a whole presents a black state, the need for endodontic treatment to remove inflammation in the root canal, and then can be restored to the crown.
Bad teeth black need timely medical attention, under the guidance of the doctor for examination, and standardized treatment, so as not to delay the condition.