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采用二维有限单元应力分析法,对干髓术和根管治疗术后银汞合金修复体进行应力分析,结果表明,干髓术选用不同厚度干髓剂,银汞合金修复体内应力和变形均有较大差异,干髓剂厚度越大,修复体内应力和变形越大。常规干髓术修复体内应力和变形明显大于根管治疗术者,而改变干髓剂垫置方法,将其垫置于略扩大并加深的根管口局部,修复体内应力和变形明显减小,与根管治疗术者相近。
The stress analysis of the amalgam restorations after stemmedomy and root canal therapy were performed by two-dimensional finite element stress analysis. The results showed that the stress and deformation of the amalgam restorations with different thicknesses of the medullary agents and amalgam There is a big difference, the greater the thickness of dry pulp, repair the greater the stress and deformation in vivo. Conventional dry-core repair of stress and deformation in vivo was significantly greater than those of root canal therapy, and change the method of dry pulp padding, the pad placed slightly enlarged and deepened the local root canal, the repair of stress and deformation significantly reduced, Similar to root canal therapy.