铅笔头、雪茄烟蒂、牙的残根。
残根太短，一般无法利用桩冠修复。
Its unable to repair dowel crown because of its shorter root of tooth.
目的比较残冠残根不同修复方法的治疗效果。
Objective To compare the residual crown and root of different repair methods of treatment.
目的比较残冠残根不同修复方法的治疗效果。
Objective To compare the residual crown and root of different repair methods of treatment.
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