国际口腔医学杂志 ›› 2021, Vol. 48 ›› Issue (1): 41-49.doi: 10.7518/gjkq.2021011
季梦真1,漆美瑶1,杜珂芯1,全淑琪1,张煜强1,郑庆华2()
Ji Mengzhen1,Qi Meiyao1,Du Kexin1,Quan Shuqi1,Zhang Yuqiang1,Zheng Qinghua2()
摘要:
目的 探讨在牙隐裂患牙根管治疗中采用传统开髓洞型和微创开髓洞型对烤瓷全冠修复后牙体抗力的影响。 方法 制作3种裂纹深度的牙隐裂三维虚拟模型,模拟微创开髓和传统开髓,并完成根管治疗和烤瓷全冠修复。在垂直加载和斜向加载条件下,记录牙体应力的分布情况和数值大小。 结果 在2种加载条件下,修复前牙齿应力集中于裂纹底部,局部应力集中随着隐裂深度的加深而增大,烤瓷全冠修复后基牙局部应力主要分布在肩台处,局部应力集中得到大幅缓解。不同开髓洞型对隐裂牙应力分布和大小的影响无明显差异。 结论 根管治疗后烤瓷全冠修复是治疗牙隐裂的有效措施;相比传统开髓洞型,微创开髓洞型并不能改善全冠修复后隐裂牙的应力分布。
中图分类号:
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