根管治疗后磨牙纵裂的原因分析

Analysis on fracture of tooth after root canal treatment

[目的]分析根管治疗后牙纵裂原因,帮助临床医师治疗时采取预防措施防止牙纵裂。[方法]以根管治疗后累及髓底的纵裂牙为研究对象,根管治疗有大面积缺损未发生纵裂的患牙作对照,比较咬合关系、牙体磨耗程度、充填材料与牙纵裂的关系。[结果]不同咬合关系、牙体磨耗程度与牙纵裂关系之间比较差异有显著性意义(P<0.01),其中咬合关系不佳引起的牙纵裂占牙纵裂总数的82%;充填材料与牙纵裂无关(P>0.05)。[结论]临床医师可以根据患者的咬合特点通过调牙合,增加咬合面的牙体组织抗力型等措施预防牙纵裂。

[ Objective] This retrospective study was performed to investigate the relationship between fracture of tooth which had taken root canal treatment and occlusal relationship, materials and degree of wearing. [ Methods ] One hundred and fif- ty patients with fracture of tooth were included in this analysis. One hundred and fifty patients whose pulpless teeth had massive defects were considered as controls. Logistic regression analysis was used to estimate the association between occlusal relationship, materials, degree of wearing and fracture of tooth. [ Results ] Occ｜usal relationship and degree of wearing had significiantly associated with the fracture of tooth （P 〈 0.01 ）. Fracture of teeth caused by bad occlusal relationship were 82% , but materials had no relationship to fracture of tooth（ P 〉 0.05 ）. [ Conclusion] Occlusal relationship and degree of wearing could be potiential risk factors for fracture of tooth.