Winkler M M, Moore B K, Rhodes B, Swartz M
Department of Operative Dentistry and Biomaterials, LSU School of Dentistry, New Orleans, LA 70119, USA.
Am J Dent. 2000 Oct;13(5):245-50.
To compare the microleakage and bond strength exhibited by two light-cured, filled dentin bonding agents, a resin cement, and cavity varnish.
The four test groups of lining agents for amalgam restorations included (LF) Light-cured, Filled resin (Clearfil Liner Bond 2); (LCF) light- and chemical-cured, Filled resin (Clearfil Liner Bond + Protect Liner); (RC) Resin Cement (Panavia 21); and (V) Varnish (Copalite). For each group, 20 Class V cavity preparations were cut in human extracted molars. Tytin amalgam was condensed into the preparation. After storage for at least 24 hrs in distilled water at 37 degrees C, all restorations were subjected to 2500 thermal cycles (8 degrees C to 48 degrees C). After 1 wk, specimens were tested. For the leakage tests, teeth were immersed in 45Ca, sectioned, and radiographs of sections were evaluated and then evaluated by Ridit analysis. Retention samples were tested to failure in tension using an Instron machine and peak load (kg) was recorded.
Compared to varnish, the two dentin bonding agents (LF and LCF) significantly decreased microleakage at the cementum margin but not at the enamel margin. The two dentin bonding agents also exhibited significantly greater retentive strength than either the resin cement or the varnish.
比较两种光固化的、含填料的牙本质粘结剂、一种树脂水门汀和窝洞封闭剂的微渗漏情况及粘结强度。
用于银汞合金修复体的四种衬层材料测试组包括（LF）光固化含填料树脂（Clearfil Liner Bond 2）；（LCF）光固化和化学固化含填料树脂（Clearfil Liner Bond + Protect Liner）；（RC）树脂水门汀（Panavia 21）；以及（V）封闭剂（Copalite）。对于每组，在人离体磨牙上制备20个V类洞。将Tytin银汞合金填入制备好的洞中。在37℃蒸馏水中储存至少24小时后，所有修复体进行2500次热循环（8℃至48℃）。1周后，对标本进行测试。对于渗漏测试，将牙齿浸入45Ca中，切片，并对切片的X线片进行评估，然后通过Ridit分析进行评估。使用Instron机器对固位样本进行拉伸破坏测试，并记录峰值载荷（kg）。
与封闭剂相比，两种牙本质粘结剂（LF和LCF）在牙骨质边缘显著降低了微渗漏，但在釉质边缘没有。这两种牙本质粘结剂的固位强度也显著高于树脂水门汀或封闭剂。
