Yap A U J, Soh M S
Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, Republic of Singapore.
Oper Dent. 2004 Mar-Apr;29(2):182-7.
This study compared the post-gel contraction of two "low-shrinkage" composites (InTen-S [IS], Ivoclar-Vivadent; Aelite LS [AL], BISCO Inc) and an ormocer (Admira [AM], Voco) to two conventional mini-filled composites (Renew [RN], BISCO; Z100 [ZO], 3M ESPE). A strain-monitoring device and test configuration were used to measure the linear polymerization shrinkage associated with the various composites (A2 shade) during and up to 60 minutes post light polymerization. Each specimen was irradiated for 40 seconds using a halogen curing light (Max, Dentsply-Caulk) with an intensity of 401 mW/cm2. Five specimens were made for each composite. Data was analyzed using one-way ANOVA/Scheffe's post-hoc test at significance level 0.05. The linear percentage shrinkage immediately after light polymerization and at 60 minutes post light polymerization ranged from 0.10 +/- 0.02 to 0.40 +/- 0.02% and 0.22 +/- 0.02 to 0.60 +/- 0.05%, respectively. Post-gel shrinkage ranking of the materials was as follows: immediately after light polymerization - IS < AL < AM < ZO < RN and at 60 minutes post light polymerization - IS < AL = AM < ZO < RN. The shrinkage associated with IS, AL and AM was significantly lower than for ZO and RN immediately after light polymerization and at 1, 10, 30 and 60 minutes post light polymerization. The post-gel polymerization shrinkage of IS, AL and AM was significantly lower than conventional mini-filled composites.
本研究比较了两种“低收缩率”复合材料（InTen-S [IS]，义获嘉伟瓦登特公司；Aelite LS [AL]，BISCO公司）、一种有机陶瓷材料（Admira [AM]，VOCO公司）与两种传统的微填料复合材料（Renew [RN]，BISCO公司；Z100 [ZO]，3M ESPE公司）的凝胶后收缩情况。使用应变监测装置和测试配置来测量光聚合过程中及光聚合后长达60分钟时，与各种复合材料（A2色）相关的线性聚合收缩率。每个样本使用强度为401 mW/cm²的卤素固化灯（Max，登士柏卡沃公司）照射40秒。每种复合材料制作五个样本。数据采用单因素方差分析/谢费尔事后检验进行分析，显著性水平为0.05。光聚合后即刻以及光聚合后60分钟时的线性收缩百分比范围分别为0.10±0.02%至0.40±0.02%以及0.22±0.02%至0.60±0.05%。材料的凝胶后收缩排名如下：光聚合后即刻 - IS < AL < AM < ZO < RN，光聚合后60分钟时 - IS < AL = AM < ZO < RN。光聚合后即刻以及光聚合后1、10、30和60分钟时，与IS、AL和AM相关的收缩显著低于ZO和RN。IS、AL和AM的凝胶后聚合收缩显著低于传统的微填料复合材料。
