Aggarwal Shalini, Garg Vaibhav
Department of Conservative Dentistry, Endodontics and Aesthetic dentistry, D.Y. Patil Dental College, Pune, India.
J Conserv Dent. 2011 Jul;14(3):293-6. doi: 10.4103/0972-0707.85819.
To study the stress concentrations in endodontically treated maxillary central incisor teeth restored with 3 different fiber post systems subjected to various oblique occlusal loads.
FEM analysis was used to analyze stress concentrations generated in maxillary anterior teeth. Computer aided designing was used to create a 2-D model of an upper central incisor. Post systems analyzed were the DT Light Post (RDT, Bisco), Luscent Anchor (Dentatus) & RelyX (3M-ESPE). The entire design assembly was subjected to analysis by ANSYS for oblique loading forces of 25N, 80N & 125 N RESULTS: The resultant data showed that the RelyX generated the least amount of stress concentration.
Minimal stress buildups contribute to the longevity of the restorations. Thus RelyX by virtue of judicious stress distribution is the better option for restoration of grossly decayed teeth.
研究三种不同纤维桩系统修复的上颌中切牙在承受不同斜向咬合负荷时的应力集中情况。
采用有限元分析（FEM）来分析上颌前牙产生的应力集中。利用计算机辅助设计创建上颌中切牙的二维模型。分析的桩系统有DT Light Post（RDT，Bisco公司）、Luscent Anchor（Dentatus公司）和RelyX（3M-ESPE公司）。整个设计组件通过ANSYS软件进行分析，施加25N、80N和125N的斜向负荷力。结果：所得数据表明RelyX产生的应力集中量最少。
最小的应力积累有助于修复体的长期使用。因此，凭借合理的应力分布，RelyX是修复严重龋坏牙齿的更佳选择。
