玻璃纤维桩在年轻恒牙冠折修复中的应用 关键词]年轻恒牙；冠折；玻璃纤维桩；根尖诱导成形术. [gap=925]Key words:young permanent teeth ;crown fracture;glass fiber post;apexification
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Enamel and dentin fracture, crown fracture with pulp exposed were also like to involved more than one tooth, the incidence of involving other tooth was 81.00%(17/21) and 78.10(25/32) respectively.
牙釉质牙本质折和牙冠折露髓较多累及多颗牙，累及率为81.00%(17/21)和78.10%(25/32)。 根折，冠根折和牙脱位可以单独发生也可以累及多颗牙。
参考来源 - 牙创伤的临床研究·2,447,543篇论文数据，部分数据来源于NoteExpress
冠折包括部分冠折裂、全冠折断。
The crown fractures included partial crown split and full-crown fractures.
结果：本组病例各种类型冠折207例，根折23例。
Results: 207 cases were crown fractures, while 23 cases were root fractures.
目的：观察恒切牙外伤冠折后行一次性根管治疗与断冠再接术的临床效果。
Objective To investigate the clinical effect of one-time root canal therapy and reattachment of permanent incisors with crown fracture.
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