Pameijer C H, Wendt S L
Department of Prosthodontics, School of Dental Medicine, University of Connecticut, Farmington 06030, USA.
Am J Dent. 1995 Feb;8(1):43-6.
To test several dental materials for their sealing properties by subjecting restored teeth to thermal cycling.
Ten teeth per group were assigned at random to six experimental and six control groups. In the experimental groups a resin composite was surface-sealed with IRM, glass ionomer, amalgam, dentin bonding agent and resin composite, experimental hybrid cement, or zinc oxide and eugenol. These six surface-seal materials were placed in bulk in the control group. After cavity preparation, restoration, cut back and application of the surface-seal material, the teeth were subjected to thermal cycling, imbedded and sectioned. A score of 0-3 was given to the amount of dye leakage observed.
Zinc oxide and eugenol demonstrated the most leakage, whereas the resin composite system TPH had the least. The results of this in vitro study render the recommendation of zinc oxide and eugenol as a surface-seal material questionable.
通过对修复后的牙齿进行热循环测试几种牙科材料的密封性能。
每组10颗牙齿被随机分配到6个实验组和6个对照组。在实验组中，用IRM、玻璃离子水门汀、汞合金、牙本质粘结剂和树脂复合材料、实验性复合树脂水门汀或氧化锌丁香酚对树脂复合材料进行表面密封。对照组则大量放置这六种表面密封材料。在制备窝洞、修复、磨除和应用表面密封材料后，对牙齿进行热循环、包埋和切片。对观察到的染料渗漏量给予0 - 3分。
氧化锌丁香酚显示出的渗漏最多，而树脂复合材料系统TPH的渗漏最少。这项体外研究的结果使得将氧化锌丁香酚作为表面密封材料的推荐值得怀疑。
