年轻恒牙的牙根仍处在生长发育阶段,如由于外伤、畸形或龋病等原因造成牙髓坏死或根尖周炎症时,可以导致牙根停止发育。根尖诱导成形术是指在消除感染或尖周炎症的基础上,用药物诱导根尖部的牙髓和(或)根尖周组织形成硬组织,使牙根继续发育并使根尖形成的治疗方法[1]。因此选择 Young permanent tooth root is still in the growth and development stage, such as due to trauma, deformity or caries and other causes of pulp necrosis or periapical inflammation, can cause the root to stop development. Apical inductive angioplasty refers to the elimination of infection or periapical inflammation, based on the use of drugs to induce root tip of the pulp and (or) periapical tissue formation of hard tissue, the roots continue to develop and the treatment of root apical formation method 1]. So choose