One case of complicated crown root fracture of upper anterior teeth managed by multidisciplinary joint approaches.

Complicated crown root fracture is a serious combined fracture of the enamel, dentin, and cementum in dental trauma. The treatment method is complicated. During the procedure, the condition of pulp, periodontal, and tooth body should be thoroughly evaluated, and a multidisciplinary approach combined with sequential treatment is recommended. This case reported the different treatment and repair processes of one case of two affected teeth after complicated crown root fracture of upper anterior teeth, including regrafting of broken crown after flap surgery at the first visit, direct resin repair to remove broken fragments, and pulp treatment and post-crown repair at the second visit. After 18 months of follow-up, the preservation treatment of the affected teeth with complicated crown root fracture was achieved. Therefore, fragment reattachment and post-crown restoration are feasible treatment options for children with complicated crown root fracture.复杂冠根折是牙外伤中一类累及牙髓的釉质-牙本质-牙骨质联合折断，治疗方法复杂，过程中需综合考虑牙髓、牙周及牙体情况，进行多学科联合序列治疗。本病例报道了1例上前牙复杂冠根折后2颗患牙不同的治疗修复过程，包括初诊时翻瓣术后11牙的断冠再接和21牙腭侧去除断裂碎片直接树脂修复，以及复诊时11、21牙的牙髓治疗及冠部修复，经过18个月的随访，患牙的功能及牙周状况维持良好，美观性也得到了患儿及家长的肯定。对于儿童复杂冠根折上前牙，断冠再接及桩冠修复是一种可行的治疗方案。.