Tanner Johanna, Carlén Anette, Söderling Eva, Vallittu Pekka K
Institute of Dentistry and Biomaterials Research, University of Turku, Finland.
J Biomed Mater Res B Appl Biomater. 2003 Jul 15;66(1):391-8. doi: 10.1002/jbm.b.10012.
The use of fiber-reinforced composites (FRC) in dentistry has increased during recent years. In marginal areas of crowns and removable partial dentures the fibers may become exposed and come into contact with oral tissues, saliva, and microbes. To date, few articles have been published on oral microbial adhesion to FRCs. The aim of this study was to compare different FRCs, their components, and conventional restorative materials with respect to S. mutans ATCC 21752 adhesion and adsorption of specific S. mutans binding proteins. Surface roughness of the materials was also determined. Four different FRCs, a restorative composite, and a high-leucite ceramic material were studied. Polyethylene FRC was found to be significantly rougher than all other materials. Aramid FRC also showed higher surface roughness in comparison with all materials but polyethylene FRC. Without a saliva pellicle, adhesion of S. mutans coincided with surface roughness and polyethylene and aramid FRC promoted S. mutans adhesion better than the other smoother materials. In the presence of salivary pellicle, ceramic and polyethylene FRC bound more bacteria than the other materials studied. Higher quantities of S. mutans binding proteins in the pellicles may in part account for the higher S. mutans adhesion to saliva-coated ceramic and polyethylene FRC.
近年来，牙科领域中纤维增强复合材料（FRC）的使用有所增加。在牙冠和可摘局部义齿的边缘区域，纤维可能会暴露并与口腔组织、唾液和微生物接触。迄今为止，关于口腔微生物在FRCs上黏附的文章发表较少。本研究的目的是比较不同的FRCs、其成分以及传统修复材料在变形链球菌ATCC 21752黏附以及特定变形链球菌结合蛋白吸附方面的情况。还测定了材料的表面粗糙度。研究了四种不同的FRCs、一种修复性复合材料和一种高白榴石陶瓷材料。发现聚乙烯FRC比所有其他材料都明显更粗糙。与除聚乙烯FRC之外的所有材料相比，芳纶FRC也表现出更高的表面粗糙度。在没有唾液薄膜的情况下，变形链球菌的黏附与表面粗糙度一致，聚乙烯和芳纶FRC比其他更光滑的材料更能促进变形链球菌的黏附。在存在唾液薄膜的情况下，陶瓷和聚乙烯FRC比所研究的其他材料结合了更多细菌。唾液薄膜中较高数量的变形链球菌结合蛋白可能部分解释了变形链球菌对唾液包被的陶瓷和聚乙烯FRC的较高黏附。
