Mora Phattarin, Nunwong Chananya, Sriromreun Parkpoom, Kaewsriprom Preecha, Srisorrachatr Ukrit, Rimdusit Sarawut, Jubsilp Chanchira
Department of Chemical Engineering, Faculty of Engineering, Srinakharinwirot University, Nakhonnayok 26120, Thailand.
Research Unit in Polymeric Materials for Medical Practice Devices, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Polymers (Basel). 2022 Oct 14;14(20):4321. doi: 10.3390/polym14204321.
Glass fiber post based on the new polymeric material, polybenzoxazine, is prepared and the effects of glass fiber contents on mechanical and thermal properties are evaluated. The mechanical response to externally applied loads of tooth restored with glass fiber-reinforced polybenzoxazine composite posts is also simulated by finite element analysis of a tridimensional model and compared with the response to that of a natural tooth. The reinforcing of glass fiber can help improve the mechanical and thermal properties of the polybenzoxazine influenced by the interfacial adhesion between the glass fiber and polybenzoxazine matrix, except for the relatively high mechanical property of the glass fiber. The mechanical data, i.e., elastic modulus under flexure load or flexural modulus by three-point bending test of the glass fiber-reinforced polybenzoxazine composites are agreed with the elastic modulus of dentin and then used in the finite element model. The restoration using the glass fiber-reinforced polybenzoxazine composite post provided the maximum von Mises equivalent stress at the cervical third area of the endodontically treated tooth model as similarly observed in the natural tooth. In addition, the maximum von Mises equivalent stress of the tooth restored with the glass fiber-reinforced polybenzoxazine composite post is also quietly like that of the natural tooth. The finding of this work provided the essential properties of the glass fiber-reinforced polybenzoxazine composite for dental restorations and appliances.
制备了基于新型聚合物材料聚苯并恶嗪的玻璃纤维桩，并评估了玻璃纤维含量对其机械性能和热性能的影响。通过三维模型的有限元分析，模拟了用玻璃纤维增强聚苯并恶嗪复合桩修复的牙齿对外加载荷的力学响应，并与天然牙齿的响应进行了比较。除了玻璃纤维具有较高的机械性能外，玻璃纤维的增强作用有助于改善受玻璃纤维与聚苯并恶嗪基体之间界面粘结影响的聚苯并恶嗪的机械性能和热性能。玻璃纤维增强聚苯并恶嗪复合材料的力学数据，即三点弯曲试验下的弯曲载荷弹性模量或弯曲模量，与牙本质的弹性模量一致，然后用于有限元模型。使用玻璃纤维增强聚苯并恶嗪复合桩进行修复时，在根管治疗后的牙齿模型的颈部三分之一区域提供了最大的冯·米塞斯等效应力，这与天然牙齿中观察到的情况类似。此外，用玻璃纤维增强聚苯并恶嗪复合桩修复的牙齿的最大冯·米塞斯等效应力也与天然牙齿的非常相似。这项工作的发现为牙科修复和器械提供了玻璃纤维增强聚苯并恶嗪复合材料的基本性能。
