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Aim: to study the electric resistance of the crown surface of tooth.
目的：研究牙冠表面电阻状态。
youdao
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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。
youdao
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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。
youdao