Titley K, Chernecky R, Maric B, Smith D
Department of Pediatric Dentistry, Faculty of Dentistry, University of Toronto, Ontario, Canada.
Am J Dent. 1994 Aug;7(4):190-4.
To examine how the priming agents of Scotchbond Multi-Purpose (SMP) influenced the wettability of collagen in the demineralized zone and hence the penetration and adaptation of its bonding monomers.
Freshly extracted bovine teeth were ground to dentin with SiC paper. SMP and Z100 resin were used. Shear bond testing was performed as well as scanning electron microscopic evaluation.
In contrast to the manufacturer's instructions, a 26.3% increase in shear bond strength was obtained when a second coat of priming agent was applied. This increase was statistically significant at the 5% level of confidence. SEM examination of failed conventionally air dried (CAD) specimens showed the presence of voids in the demineralized layer. SEM examination of failed specimens prepared by a critical point drying (CPD) technique showed that these voids were filled with collagen fibrils. The CPD technique also clearly showed that collagen fibrils were incorporated in the unfilled resin. Although priming agents appear to facilitate the penetration of unfilled resin into the demineralized layer and the dentin tubules, areas of unincorporated collagen fibrils can be seen even after two or more applications of the priming agent.
研究Scotchbond多功能粘结剂（SMP）的底涂剂如何影响脱矿层中胶原蛋白的润湿性，进而影响其粘结单体的渗透和适应性。
用碳化硅砂纸将新鲜拔除的牛牙磨至牙本质。使用SMP和Z100树脂。进行剪切粘结测试以及扫描电子显微镜评估。
与制造商的说明相反，当涂覆第二层底涂剂时，剪切粘结强度提高了26.3%。在5%的置信水平下，这种提高具有统计学意义。对传统空气干燥（CAD）失败标本的扫描电子显微镜检查显示脱矿层中存在空隙。对采用临界点干燥（CPD）技术制备的失败标本的扫描电子显微镜检查表明，这些空隙充满了胶原纤维。CPD技术还清楚地表明胶原纤维被纳入未填充的树脂中。尽管底涂剂似乎有助于未填充树脂渗透到脱矿层和牙本质小管中，但即使在涂覆两次或更多次底涂剂后，仍可见未纳入胶原纤维的区域。
