Mukai Yoshiharu, Kamijo Kazuko, Fujino Fukue, Hirata Yukio, Teranaka Toshio, ten Cate Jacob M
Department of Oral Medicine, Kanagawa Dental College, Yokosuka, Japan.
Eur J Oral Sci. 2009 Dec;117(6):750-4. doi: 10.1111/j.1600-0722.2009.00678.x.
The demineralization of dentin was studied when placed adjacent to one of four experimental denture base-resins. These experimental resins contained polymethylmethacrylate (PMMA) and 0, 5, 10, 20 or 30 wt% surface reaction-type prereacted glass-ionomer (S-PRG) filler, respectively. A dentin thin-section was sandwiched between these resins and subjected to demineralization for 1 wk. Microradiographic analyses showed that the mineral vol% of the surface was increased, and lesion formation was inhibited, in a dose-response relationship with the amount of S-PRG filler. Moreover, the mineral loss decreased, by up to 60%, with an increasing amount of filler. These results indicate that denture base-resins containing S-PRG filler possess a substantial inhibition capability against demineralization, and this may thereby assist in preventing root caries of abutment teeth.
当牙本质与四种实验性义齿基托树脂之一相邻放置时，对其脱矿情况进行了研究。这些实验性树脂分别含有聚甲基丙烯酸甲酯（PMMA）和0、5、10、20或30 wt%的表面反应型预反应玻璃离子（S-PRG）填料。将牙本质薄片夹在这些树脂之间，进行1周的脱矿处理。显微放射照相分析表明，表面的矿物质体积百分比增加，病变形成受到抑制，与S-PRG填料的量呈剂量反应关系。此外，随着填料量的增加，矿物质损失减少了多达60%。这些结果表明，含有S-PRG填料的义齿基托树脂对脱矿具有显著的抑制能力，这可能有助于预防基牙的根龋。
