All teeth had periodontitis and occlusal traumatism.Conclusion Occlusal traumatism was the main causes of ertical root fracture.X-ray examination was helpful to diagnosis.Pre...

• 结论咬合创伤是牙根纵裂的主要原因,X线检查有助诊断,牙根纵裂缺乏有效的治疗方法,应以预防为主。