OD to 15 mm below tooth root, ie tooth zone.
从外径最外侧到齿根下15毫米，即齿区。
Do you see this gray area around the root of this tooth?
你能看见这颗牙齿齿根周围的灰色部分吗？
Sometimes a tooth with a root canal filling will change color.
牙根管补过的牙有时会变色。
Thickness of the tooth body; Root canal therapy; Research.
牙体壁厚度；根管疗法；研究。
The capillary network close to the root of tooth.
靠近牙根侧为毛细血管网。
Its unable to repair dowel crown because of its shorter root of tooth.
残根太短，一般无法利用桩冠修复。
Root canal therapy is an effective method in preserving bad tooth.
根管治疗是保存患牙，避免其早失的一种有效方法。
Root canal therapy is an effective method in preserving bad tooth.
根管治疗是保存患牙，避免其早失的一种有效方法。
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