主题：模型 | 医源世界 关键词】 三维有限元；纵折牙；金属全冠；桩核 [gap=1131] words】 three dimensional finite element;vertically fracture tooth;metal crown;dowel crown
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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。
Conlusion: the restoration of molars residual root and crown of the aged can be improved by means of split dowel crown.
结论：分体桩核冠能较好地修复老年人磨牙残根残冠。
Abstract: Objective to compare the restorative effects of crown lengthening surgery and gingivectomy on dowel crown of deep-seated subgingival teeth fracture.
摘要：目的比较牙冠延长术与牙龈切除术用于残根残冠桩冠修复中的疗效。
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