... ①牙冠折断（tooth crown tracture） ②牙根折断（tooth root fracture） ③冠根折断（tooth crown-root fracture） ...
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Methods Hemisections were performed on reserved canals of incomplete tooth fracture, complete root fracture and furcation involvement after root canal therapy.
方法选择隐裂、根折或根分叉病变患者，对欲保留牙根进行根管治疗后，行半牙切除术。
Conclusion: Tooth extrusion method with new method is an effective method for anterior teeth with crown-root fracture.
结论：使用改进的固定矫正器进行牙根牙合向牵引治疗前牙冠根折的方法有效可行。
Objective:To observe the clinical effect of tooth extrusion with progressive methods for anterior teeth with crown-root fracture.
目的观察牙冠延长术治疗断缘位于龈下的冠根联合折断牙的临床效果。
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