Ono Masahiro, Nikaido Toru, Ikeda Masaomi, Imai Susumu, Hanada Nobuhiro, Tagami Junji, Matin Khairul
Cariology and Operative Dentistry, Tokyo Medical and Dental University, Tokyo, Japan.
Dent Mater J. 2007 Sep;26(5):613-22. doi: 10.4012/dmj.26.613.
The surface properties of three different resin composite materials which influence Streptococcus mutans biofilm formation were evaluated using an artificial mouth system (AMS). Specimens were prepared from Clearfil AP-X, Grandio, and Reactmer Paste, and each material was divided into two groups: (1) surface was ground with 800-grit silicon paper (SiC#800); or (2) surface was polished with up to 1- microm diamond paste (DP1 microm). Biofilms were grown on the surface of each specimen for 20 hours, and then subjected to vortex agitation followed by measurement of retained biofilms. Surfaces with retained biofilms were also inspected by SEM. Significant differences were detected in surface roughness (Ra) between the two polishing conditions for all materials. The quantity of retained biofilm was significantly less (p < 0.05) on Clearfil AP-X DP 1 microm than on Clearfil AP-X SiC#800. With Reactmer Paste, their surfaces registered the lowest amount of retained biofilm--but there were no significant differences between the two polishing conditions. In conclusion, polishing did not render all resin composites equally resistant to biofilm formation.
使用人工口腔系统（AMS）评估了三种不同树脂复合材料影响变形链球菌生物膜形成的表面特性。样本由Clearfil AP-X、Grandio和Reactmer Paste制备，每种材料分为两组：（1）表面用800目砂纸（SiC#800）研磨；或（2）表面用粒度达1微米的金刚石膏（DP1微米）抛光。生物膜在每个样本表面生长20小时，然后进行涡旋搅拌，随后测量留存的生物膜。留存有生物膜的表面也通过扫描电子显微镜进行检查。所有材料在两种抛光条件下的表面粗糙度（Ra）均检测到显著差异。Clearfil AP-X DP 1微米上留存的生物膜量显著少于Clearfil AP-X SiC#800（p < 0.05）。对于Reactmer Paste，其表面留存的生物膜量最低——但两种抛光条件之间没有显著差异。总之，抛光并未使所有树脂复合材料对生物膜形成具有同等抗性。
