Saunders W P, Strang R, Ahmad I
Department of Conservative Dentistry, Glasgow Dental Hospital and School.
Am J Dent. 1991 Oct;4(5):211-3.
This in vitro study assessed the microleakage of Class V restorations using Mirage Bond (NPG-PMDM) with a hybrid light polymerized resin composite. Restorations were inserted in cavities prepared in extracted human premolars using either bulk or incremental packing and with or without an intermediary unfilled resin. The enamel margin of each tooth was etched only with the primer. The teeth were stored for 1 week at 37 degrees C, thermocycled, and the restorations examined for leakage using methylene blue dye. The teeth were sectioned mesiodistally through the restorations and the microleakage assessed visually. All groups exhibited leakage at the gingival margin, but there was a significant difference between the cavities restored by bulk packing of the resin composite. Application of the intermediary resin did not diminish microleakage (P less than 0.01). Nevertheless, there were no other significant differences in microleakage between the groups (P greater than 0.05).
这项体外研究评估了使用Mirage Bond（NPG - PMDM）和混合光固化树脂复合材料的V类修复体的微渗漏情况。使用整块填充或分层填充，以及有无中间未填充树脂的方式，将修复材料填入拔除的人类前磨牙制备的窝洞中。每颗牙齿的釉质边缘仅用底漆蚀刻。牙齿在37摄氏度下储存1周，进行热循环处理，然后使用亚甲蓝染料检查修复体的渗漏情况。沿近远中方向将牙齿通过修复体切开，目视评估微渗漏情况。所有组在牙龈边缘均出现渗漏，但树脂复合材料整块填充修复的窝洞之间存在显著差异。使用中间树脂并未减少微渗漏（P小于0.01）。然而，各组之间在微渗漏方面没有其他显著差异（P大于0.05）。
