Analysis of stress distribution in a maxillary central incisor subjected to various post and core applications
Analysis of stress distribution in a maxillary central incisor subjected to various post and core applications
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DOI：
10.1016/s0099-2399(98)80087-3
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发表时间：
1998-02-01
影响因子：
4.2
通讯作者：
Yaman, Y
中科院分区：
文献类型：
--
作者：
Yaman, SD;Alacam, T;Yaman, Y
在这项研究中，使用三维有限元方法确定了上颌中切牙在接受根管治疗和不同桩核应用后的应力分布。考虑了铸造金桩和金核以及预制不锈钢桩的不同组合，或者预制钛桩与银汞合金或复合核的组合。在所有情况下，这颗牙齿都被认为有一个瓷冠。这项研究的主要目的是评估模拟咬合力引起的应力分布，从而调查不同桩核应用的可靠性。结果表明，在本研究范围内，铸造金桩和金核的应用效果最好。这项研究的第二个目的是强调使用唯一应力值的重要性，该值包含在确定可能的故障时加载时存在的所有可能的应力分量的影响。文中给出了合成应力值和各分量的详细情况，并证明了单独根据单个分量进行估计可能会导致错误的结果。
In this study, stress distribution in a maxillary central incisor that was subjected to endodontic treatment and various post and core applications was determined by using a three-dimensional finite-element method. Cast gold post and gold core and different combinations of prefabricated stainless-steel post, or a prefabricated titanium post with amalgam or composite cores were considered. In all cases, the tooth was assumed to have a porcelain crown. The primary purpose of the study was to evaluate the stress distribution due to simulated biting forces and thus investigate the reliability of different post and core applications. It was found that, within the limitations of the study, the cast gold post and gold core application yielded the best result. The second purpose of the study was to highlight the importance of using a unique stress value, which contains the effects of all the possible stress components existing upon loading in the determination of a possible failure. A resultant stress value and all the constituent components were shown in detail, and it was proved that an estimation independently based on an individual component might lead to erroneous results.