儿童牙外伤是儿童口腔科的常见病,年轻恒牙外伤多发生于7～9岁儿童,约占恒牙外伤的50%～70%,尤多发生于上颌中切牙[1]。年轻恒牙外伤对儿童的咬合和生长发育都会产生影响,因此,积极预防和治疗具有非常重要的意义。现介绍图8术后3个月,无牙根图9术后1年,无牙根吸收现象吸收现象1 Pediatric dental trauma is a common disease in children’s stomatology. Young permanent tooth trauma mostly occurs in children aged 7-9 years, accounting for 50% -70% of permanent tooth trauma, especially in the maxillary central incisor. Young permanent tooth injury on children’s bite and growth and development will have an impact, therefore, active prevention and treatment of great significance. Now introduced Figure 8 3 months after surgery, no tooth root Figure 9 1 year after surgery, no root absorption Absorption 1