Stress analysis of endodontically treated anterior teeth restored with different types of post material
Stress analysis of endodontically treated anterior teeth restored with different types of post material
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DOI：
10.4012/dmj.25.145
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发表时间：
2006-03-01
影响因子：
2.5
通讯作者：
Yatani, H
中科院分区：
文献类型：
--
作者：
Nakamura, T;Ohyama, T;Yatani, H
采用有限元法分析上颌中切牙根管治疗后桩核全瓷冠修复的应力分布。采用二维有限元模型分析了不同桩径和桩长的牙根处的拉应力。一根桩长为根的1/3（短），另一根桩长为根的2/3（长）;一根桩直径为根的1/3（窄），另一根桩直径为根的2/3（宽）。桩核采用金合金铸造桩核、不锈钢桩核、纤维桩核。结果表明，纤维桩对桩尖周围的牙本质产生的应力小于金属桩。因此，这一发现表明，为了减少导致牙根断裂的应力，应使用长而细的纤维桩。
Finite element analysis was performed to evaluate stress distribution in maxillary central incisors treated endodontically and restored with a post and an all-ceramic crown. Tensile stress at tooth root was analyzed using two-dimensional finite element models with different post diameters and lengths. One post length was 1/3 of the root (short), while the other was 2/3 of the root (long); one post diameter was 1/3 of the root (narrow), while the other was 2/3 of the root (wide). The following combinations were used for posts and cores: gold alloy cast post and core, commercial stainless steel post and resin core, and fiber post and resin core. Results showed that the fiber post produced less stress on the root dentin around the post tip than did the metal posts. This finding thus suggested that to reduce the stresses that cause root fracture, a long, thin fiber post should be used.