Kawai K, Urano M, Ebisu S
Osaka University Faculty of Dentistry, Osaka, Japan.
J Prosthet Dent. 2000 Jun;83(6):664-7.
In some instances of porcelain restoration, refinishing is inevitable. In terms of plaque accumulation on porcelain, refinishing could be a substitute method for glazing.
This study compared the amount of adhesion of plaque components (bacterial cells and glucans) on porcelain disks with various degrees of surface roughness to assess the effects of surface roughness on the amount of plaque accumulation.
Radiolabeled cell suspensions were incubated with porcelain disks for 3, 8, and 24 hours at 37 degrees C, and the amounts of adhered cells and glucans were measured by using a liquid scintillation method.
The amount of cells and glucans adhered on porcelain increased with incubation time. The surface roughness value and the amount of plaque adhesion decreased with the increase in polishing level. However, the greatest amount of plaque was adhered on glazed surfaces, although their surfaces were smoother than the surfaces polished with 120- or 600-grit abrasive papers.
With the exception of glazed surfaces, a positive correlation between surface roughness and the amount of plaque accumulation was observed. Repolishing with a diamond paste would not induce problems of plaque accumulation, compared with an intact glazed surface.
在某些瓷修复的情况下，重新打磨是不可避免的。就瓷表面的菌斑积聚而言，重新打磨可能是一种替代上釉的方法。
本研究比较了不同表面粗糙度的瓷盘上菌斑成分（细菌细胞和葡聚糖）的黏附量，以评估表面粗糙度对菌斑积聚量的影响。
将放射性标记的细胞悬液与瓷盘在37℃下孵育3、8和24小时，并用液体闪烁法测量黏附细胞和葡聚糖的量。
瓷盘上黏附的细胞和葡聚糖量随孵育时间增加。表面粗糙度值和菌斑黏附量随抛光程度的增加而降低。然而，尽管上釉表面比用120目或600目砂纸抛光的表面更光滑，但菌斑黏附量最大。
除上釉表面外，观察到表面粗糙度与菌斑积聚量之间呈正相关。与完整的上釉表面相比，用金刚石糊剂重新打磨不会引发菌斑积聚问题。
