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
Objective To estimate the effect of restorative treatment on conserving posterior crown fracture tooth.
目的：评估用修复的方法保存后牙牙冠纵裂牙齿的效果。
Objective to investigate the clinical effect of partial pulpotomy on young permanent incisors with complicated crown fracture.
目的观察部分活髓切断术治疗年轻恒牙冠折露髓的临床效果。
Results:Of the teeth, 61.2% were prosthetic failures which were due primarily to crown fracture. 29.8% were periodontal failures.
结果：与修复有关的失败占6 1 .2 % ，其中主要是冠折。与牙周疾病有关的失败占2 9.8%。
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