Kaga Naoyuki, Nagano-Takebe Futami, Nezu Takashi, Matsuura Takashi, Endo Kazuhiko, Kaga Masayuki
Section of Fixed Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 814-0193, Japan.
Oral Medicine Research Center, Fukuoka Dental College, Fukuoka 814-0193, Japan.
Materials (Basel). 2020 May 6;13(9):2140. doi: 10.3390/ma13092140.
This study was aimed at investigating the protective effects of glass ionomer cement (GIC) and surface pre-reacted glass ionomer (S-PRG) fillers used as dental restorative materials on demineralization of bovine enamel. GlasIonomer FX ULTRA (FXU), Fuji IX GP Extra (FIXE), CAREDYNE RESTORE (CDR) were used as GICs. PRG Barrier Coat (BC) was used as the S-PRG filler. They were incubated in a lactic acid solution (pH = 4.0) for six days at a temperature of 37 °C. The mineral was etched from the enamel surface, and a large number of Ca and P ions were detected in solution. The Al, F, Na, Sr, and Sr ions were released in GICs and S-RPG fillers. The Zn ion was released only in CDR and the B ion was released only in BC. The presence of apparent enamel prism peripheries was observed after six days of treatment for the group containing only enamel blocks. pH values for the FXU, FIXE, CDR, BC, and enamel block groups after six days were 6.5, 6.6, 6.7, 5.9, and 5.1, respectively. Therefore, the observed pH neutralization effect suppressed progression of caries due to the release of several ions from the restoratives.
本研究旨在调查用作牙科修复材料的玻璃离子水门汀（GIC）和表面预反应玻璃离子（S-PRG）填料对牛牙釉质脱矿的保护作用。GlasIonomer FX ULTRA（FXU）、Fuji IX GP Extra（FIXE）、CAREDYNE RESTORE（CDR）用作GIC。PRG Barrier Coat（BC）用作S-PRG填料。它们在37°C的温度下于乳酸溶液（pH = 4.0）中孵育6天。矿物质从牙釉质表面被蚀刻掉，并且在溶液中检测到大量的钙和磷离子。铝、氟、钠、锶和锶离子在GIC和S-RPG填料中释放。锌离子仅在CDR中释放，硼离子仅在BC中释放。对于仅含牙釉质块的组，处理6天后观察到明显的牙釉质棱柱周边。6天后，FXU、FIXE、CDR、BC和牙釉质块组的pH值分别为6.5、6.6、6.7、5.9和5.1。因此，观察到的pH中和作用抑制了由于修复材料释放几种离子而导致的龋齿进展。
