Photoelastic stress analysis of different post and core restoration methods
Photoelastic stress analysis of different post and core restoration methods
复制标题
DOI：
10.4012/dmj.28.204
复制
发表时间：
2009-03-01
影响因子：
2.5
通讯作者：
Masuoka, David
中科院分区：
文献类型：
--
作者：
Yamamoto, Masahiro;Miura, Hiroyuki;Masuoka, David
本研究的目的是比较三种类型的桩核系统，通过分析应力大小的根。为此，制作了根管治疗的上颌中切牙的二维光弹性模拟模型。本研究选择了三种不同类型的桩核系统：复合树脂桩核、复合树脂核与玻璃纤维桩的组合以及传统的铸造金属桩核。在透射偏光镜中以相同的加载力（400 N）在45 °腭向观察所制造的模型，并由此分析记录的条纹阶数。在这项研究中得到的结果表明，基台建立使用复合树脂核结合玻璃纤维桩模型产生的应力集中最低，因此，在修复牙髓治疗的牙齿的情况下，有效地防止应力集中。
The aim of this Study was to compare three types of post and core systems by analyzing the stress magnitude within the root. To this end, two-dimensional photoelastic simulation models of endodontically treated maxillary central incisors were fabricated. Three different types of post and core systems were selected for this study: composite resin post and core, composite resin core in combination with a glass fiber post, and conventional cast metal post and core. The fabricated models were observed in a transmission polariscope with the same loading force (400 N) on 45 degrees palatal direction and the fringe orders registered were thereby analyzed. Results obtained in this study suggested that abutment build-up using composite resin core in combination with a glass fiber post model produced the lowest stress concentration and is hence effective in preventing stress concentration in the case of restored endodontically treated teeth.