Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-facial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.
Dent Mater. 2010 Mar;26(3):215-22. doi: 10.1016/j.dental.2009.10.003. Epub 2009 Nov 11.
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.
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 (4 mm x 4 mm x 2.5 mm) and to flat mid-coronal dentin surfaces using the two-step self-etch adhesive 'Silorane System Adhesive' (3M-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 1 mm x 1 mm (non-trimmed) sticks to measure the micro-tensile bond strength (microTBS).
No statistical difference in microTBS was recorded between Z100 'flat'(1) and FS 'flat'(3). Bonding to class-I cavity dentin lowered the microTBS in all groups, but this was only statistically significant for FS 'cavity/bulk-filled'(5) and FS 'cavity/flowable uncured'(8).
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 microTBS, suggesting that factors other than polymerization shrinkage influenced the microTBS.
在高配置因子（C 因子）腔中，复合材料的聚合收缩会导致聚合收缩应力。在预防高聚合收缩应力方面，最近市场上出现了一种低收缩硅烷酯复合材料（Filtek Silorane，FS，3M ESPE）。因此，我们研究了 C 因子（平面表面与 I 类腔）和不同复合材料应用方案对低收缩复合材料与人牙本质粘结效果的影响。
使用两步自酸蚀粘结剂“Silorane 系统粘结剂”（3M ESPE），将一种低收缩硅烷酯基复合材料（FS）和一种传统的甲基丙烯酸酯基复合材料（Filtek Z100，3M-ESPE）粘结到标准化的 I 类窝洞（4mmx4mmx2.5mm）和中部冠状牙本质表面。根据以下处理方案，将实验分为 8 组：Z100“平面”（1）、Z100“窝洞”（2）、FS“平面”（3）、FS“平面/整体填充”（4）、FS“窝洞/整体填充”（5）、FS“窝洞/分层填充”（6）、FS“窝洞/流动固化”（7）和 FS“窝洞/流动未固化”（8）。每组至少使用 5 颗牙齿。经过 1 周的水储存后，将牙齿切成 1mmx1mm（未修剪）的小块，以测量微拉伸粘结强度（microTBS）。
Z100“平面”（1）和 FS“平面”（3）的 microTBS 没有统计学差异。所有组的 I 类窝洞牙本质粘结均降低了 microTBS，但仅对 FS“窝洞/整体填充”（5）和 FS“窝洞/流动未固化”（8）有统计学意义。
使用两步自酸蚀 Silorane 系统粘结剂，传统复合材料 Filtek Z100 和低收缩复合材料 Filtek Silorane 与人牙本质的粘结效果相同。Filtek Silorane 的整体填充（FS“平面/整体填充”（4））显著降低了 microTBS，表明除聚合收缩外，其他因素也影响了 microTBS。
