Takashino Nami, Nakashima Syozi, Shimada Yasushi, Tagami Junji, Sumi Yasunori
Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Dent Mater J. 2016;35(3):425-31. doi: 10.4012/dmj.2015-341.
This study aimed to examine the effect of thermal cycling on gap formation at the interface between infiltrated resin (ICON(®)) and enamel lesion and on the durability of anti-demineralization efficacy to predict the future performance. SS-OCT technique was examined to determine whether it has the potential to detect the gap. Bovine enamel lesions were prepared, and the infiltrated resin was applied to the lesion. Resin-infiltrated lesion specimens were thermal cycled 10,000 cycles and further demineralized in pH 4.5 buffer for 7 days. Released Ca (mg/cm(2)) was quantified by Ca electrode. The SS-OCT technique was applied to detect the gap, and SEM observation was performed to determine the presence of the gap. There was no significant difference in the amount of Ca release before and after the thermal cycling, suggesting long-lasting anti-demineralization efficacy of the resin. SS-OCT and SEM observations indicated no apparent gap formation after the thermal cycling.
本研究旨在探讨热循环对渗透树脂（ICON(®)）与釉质病变界面间隙形成的影响以及抗脱矿效果的耐久性，以预测其未来性能。研究了扫频光学相干断层扫描（SS-OCT）技术，以确定其是否有检测间隙的潜力。制备牛牙釉质病变样本，并将渗透树脂应用于病变处。对树脂渗透的病变样本进行10000次热循环，然后在pH 4.5缓冲液中再脱矿7天。通过钙离子电极定量测定释放的钙（mg/cm(2)）。应用SS-OCT技术检测间隙，并进行扫描电子显微镜（SEM）观察以确定间隙的存在。热循环前后钙释放量无显著差异，表明该树脂具有持久的抗脱矿效果。SS-OCT和SEM观察表明，热循环后未形成明显间隙。
