几种常用口腔材料细菌粘附性能比较

摘要

Objective To evaluate the difference of bacterial adhesion of different dental materials. Methods Five type of dental materials were selected, including self-curing denture base resin,composite resin, zirconia, titanium and nickel-cobalt alloy. 1. 3cm × 2. 0cm × 0. 2cm specimens of these dental materials were prepared and five test pieces in each material made. The surface of the specimens were polished. Sreptococcus mutans ATCC 25175 was selected, and the bacterial suspension was placed on the specimens and cultured at 37℃ for 48h. Then the bacteria that adhered to the specimens were eluted, cultured again and counted. The data were statistically analyzed. Results The amount of the bacteria that adhered to titanium was the least, followed by zirconia,resin,nickel-cobalt alloy and self-curing denture base resin( P<0. 05 ) . Conclusion Among the five types of dental materials, titanium had better antibacterial adhesion property.%目的：探讨5种口腔常用材料的抗细菌粘附性能。方法将自凝甲基丙烯酸甲酯基托树脂、Z250复合树脂、氧化锆陶瓷、纯钛和镍铬合金5种牙科常用修复材料,分别制备成3．0cm ×2．0cm ×0．2cm的板片试件,每组各5片。各组试件表面进行抛光处理,使试件表面粗糙度( Ra)值无显著性差异。实验菌株选用变形链球菌,用细菌悬浮液置试件表面,37℃培养48h,对粘附在材料表面的细菌再进行洗脱、培养、菌落计数,使用SPSSl7．0软件对试验结果进行统计分析。结果纯钛表面变形链球菌粘附量最低,依次为氧化锆陶瓷、Z250复合树脂、镍铬合金、自凝甲基丙烯酸甲酯基托树脂。结论不同口腔材料在同样粗糙度的条件下,抗细菌粘附性能存在差异,钛具有较好的抗细菌粘附性能。