Tani Y, Nambu T, Ishikawa A, Katsuyama S
Department of Biomaterials, Research Center for Biomedical Engineering, Kyoto University, Japan.
Dent Mater J. 1993 Dec;12(2):182-9. doi: 10.4012/dmj.12.182.
This study quantified the contraction force and polymerization shrinkage of composite resins with/without beta-Quartz Glass Ceramic Inserts (BQCI) as "Megafiller". The materials used for the determination included a chemically cured composite and five light-cured composites. The system for measuring contraction force consisted of a transparent teflon tube for preparing the specimen, a small load cell, a dynamic strain gauge and a pen-recorder. After the composite was packed into the teflon mold, a BQCI (Type R3) was inserted through the opening and the specimen was cured. Linear polymerization shrinkage of the composites was measured every 10 seconds from the start of mixing or irradiation to 90 minutes by the mercury bath method. Three pieces each of BQCI (Type T3) were inserted in each specimen. The results suggested that BQCI was markedly effective in reducing polymerization shrinkage, but was not always effective in reducing the contraction force during polymerization.
本研究对含有/不含有作为“超大填料”的β-石英玻璃陶瓷嵌体（BQCI）的复合树脂的收缩力和聚合收缩进行了量化。用于测定的材料包括一种化学固化复合树脂和五种光固化复合树脂。测量收缩力的系统由用于制备试样的透明聚四氟乙烯管、一个小型称重传感器、一个动态应变仪和一个笔录式记录器组成。将复合树脂填入聚四氟乙烯模具后，通过开口插入一个BQCI（R3型）并使试样固化。通过汞浴法从混合或照射开始至90分钟，每10秒测量一次复合树脂的线性聚合收缩。每个试样中插入三片BQCI（T3型）。结果表明，BQCI在降低聚合收缩方面显著有效，但在降低聚合过程中的收缩力方面并不总是有效。
