Relaxation modulus of denture base resin reinforced with woven glass fibers.
Relaxation modulus of denture base resin reinforced with woven glass fibers.
复制标题
用编织玻璃纤维增强的义齿基托树脂的松弛模量。
DOI：
10.4012/dmj.21.1
复制
发表时间：
2002
影响因子：
2.5
通讯作者：
K. Fujii
中科院分区：
文献类型：
--
作者：
T. Kanie;H. Arikawa;K. Fujii
本研究通过对义齿基托树脂进行三点加载实验，研究了机织玻璃纤维对义齿基托树脂松弛模数的增强作用。3个夹心型受弯试件均为3 mm厚，分别为压缩玻璃纤维(U型)、中心玻璃纤维(C型)和拉伸玻璃纤维(L型)。未加固试件(ACR)作为对照。根据应力松弛曲线计算应力开始后8s的松弛系数(Er(8))。玻璃态时，U型和L型的Er(8)S大于ACR型和C型。在橡胶状态(高原地区)，U型和L型的Er(8)S大于ACR型和C型。在U型和L型试件中加入编织玻璃纤维，在口腔温度附近提高了PMMA的松弛模数，并且随着温度的升高，它们抑制了应力松弛。
This study examined the reinforcing effect of woven glass fibers on the relaxation modulus by three-point loading of denture base resin. Three sandwich-type flexure test specimens polymerized by heating were used, all 3 mm thick: glass fibers in compression (U type); glass fibers in the center (C type); and glass fibers in tension (L type). Unreinforced specimens (ACR) were produced as a control. The relaxation modulus after 8 sec from the start of stress (Er(8)) was calculated from stress relaxation curves. In the glassy state, the Er(8)s of the U and L types were greater than those of the ACR and C types. In the rubbery state (plateau region), the Er(8)s of the U and L types were greater than those of the ACR and C types. The woven glass fibers added to the U and L type specimens increased the relaxation modulus of PMMA near the oral temperature; moreover, they inhibited stress relaxation when the temperature increased.