The tooth also had all the components of normal teeth, including enamel, crown and root, and connective fibers to fix it to bone.

培育的牙齿还具备正常牙齿的所有组成成分，包括釉质、齿冠和牙根，以及使其固定于骨头的结缔组织纤维。

youdao

I have a root canal filling in one of my teeth. The tooth is changing color. Can anything be done about it?

我有一颗牙在牙根管里补过。现在这颗牙变了颜色，有什么办法可以解决？

youdao

CONCLUSION: the tooth type or tooth position, root curvature and calcification have significantly influenced the outcome of root canal treatment.

结论：根管治疗的失败与牙位(牙类型和牙位置)、根管弯曲度和钙化度密切相关。

youdao

In the most serious cases the enamel is worn away to such an extent that the dentine (the substance that comprises the bulk of the tooth) or even the pulp (the root) of the tooth are exposed.

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It took 10 people to lift the sedated bear onto a make-shift operating table to have root canal done on the tooth.

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If you are removing it for prevention of tooth decay or periodontal disease such as gingivitis, which destroys the root and makes the teeth fall out then I believe it's best at night.

WSJ: How to Be a Better Flosser