期刊
DENTAL MATERIALS
卷 26, 期 3, 页码 215-222出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dental.2009.10.003
关键词
Adhesion; Dentin; Composite; Silorane; Micro-tensile bond strength; Polymerization shrinkage
资金
- FWO [G.0206.07]
- KULeuven [OT/06/55]
- ESPE (Seefeld, Germany) [3M]
Objectives. Polymerization shrinkage of a composite in a high configuration-factor (C-factor) cavity leads to polymerization shrinkage stress. In the prevention of high polymerization shrinkage stress, a low-shrinking silorane composite (Filtek Silorane, FS, 3M ESPE) was recently marketed. Therefore, we investigated the effect of C-factor (flat surface vs. class-I cavity) and different composite application protocols on the bonding effectiveness of a low-shrinking composite to human dentin. Methods. A low-shrinking silorane-based composite (FS) and a conventional methacrylate-based composite (Filtek Z100, 3M ESPE) were bonded to standardized occlusal class-I cavities (4mm x 4mm x 2.5mm) and to flat mid-coronal dentin surfaces using the two-step self-etch adhesive 'Silorane System Adhesive' (3 M-ESPE). Eight experimental groups were formed, according to the following treatment protocols: Z100 'flat'(1), Z100 'cavity'(2), FS 'flat'(3), FS 'flat/bulk-filled'(4), FS 'cavity/bulk-filled'(5), FS 'cavity/layered-filled'(6), FS 'cavity/flowable cured'(7) and FS 'cavity/flowable uncured'(8). For each group, at least 5 teeth were used. After 1 week of water storage, the teeth were sectioned to 1mm x 1mm (non-trimmed) sticks to measure the micro-tensile bond strength (mu TBS). Results. No statistical difference in mu TBS was recorded between Z100 'flat'(1) and FS 'flat'(3). Bonding to class-I cavity dentin lowered the mu TBS in all groups, but this was only statistically significant for FS 'cavity/bulk-filled'(5) and FS 'cavity/flowable uncured'(8). Significance. Using the two-step self-etch Silorane System Adhesive, the conventional composite Filtek Z100 and the low-shrinking composite Filtek Silorane bonded equally well to dentin. Bulk-filling with Filtek Silorane (FS 'flat/bulk-filled'(4)) significantly decreased the mu TBS, suggesting that factors other than polymerization shrinkage influenced the mu TBS. (C) 2009 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据