Surface pre‐reacted glass‐ionomer (S‐PRG) technology allows for the release of multiple ions. This study was performed to investigate the remineralization of etched enamel after removal of the bracket using a novel paste containing S‐PRG filler. Surfaces of polished enamel were etched with phosphoric acid and then subdivided into two regions. Bracket bonding resin was thinly applied to one region. After 24‐hr immersion in artificial saliva, the bonding resin on the enamel surfaces was removed by grinding with tungsten carbide bur at low‐speed, followed by polishing with one of four different polishing systems: (a) nonfluoridated paste (NF); (b) fluoridated paste (F); (c) S‐PRG filler‐containing paste (S‐PRG); or (d) nonfluoridated plus S‐PRG filler‐containing paste (NF + S‐PRG) (n = 15). The polished specimens were then immersed in an artificial saliva solution for 7 days. Nanoindentation testing of enamel surfaces was performed and their mechanical properties were compared. Representative specimens were examined with scanning electron microscope. In all specimens, the mechanical properties of the enamel surfaces were markedly degraded by acid etching. However, the mechanical properties of both regions (etched and resin‐infiltrated enamels) showed recovery after polishing and 7‐day immersion. Polishing with NF + S‐PRG paste led to significant recovery of mechanical properties compared to polishing with NF or S‐PRG paste alone, and remineralization was equivalent to that seen with F paste. Porous etched enamel surfaces were filled with a remineralization layer after each polishing procedure and 7‐day immersion in all polishing groups. Polishing using NF + S‐PRG paste can facilitate enamel remineralization after bracket removal.

中文翻译：

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含表面预反应玻璃离聚物填料的抛光膏对正畸托槽脱粘后牙釉质再矿化的影响。

表面预反应玻璃离聚物 (S-PRG) 技术允许释放多种离子。本研究旨在研究使用含有 S-PRG 填料的新型糊剂去除托槽后蚀刻牙釉质的再矿化。抛光珐琅的表面用磷酸蚀刻，然后细分为两个区域。支架粘合树脂薄薄地涂在一个区域。在人工唾液中浸泡 24 小时后，通过用碳化钨车针低速研磨去除搪瓷表面的粘合树脂，然后用四种不同的抛光系统之一进行抛光：（a）非氟化膏（NF）；(b) 氟化糊剂 (F)；(c) 含 S-PRG 填料的糊状物 (S-PRG)；或 (d) 非氟化加 S-PRG 填料的糊状物 (NF + S-PRG) ( n= 15）。然后将抛光后的样品浸入人工唾液溶液中 7 天。对搪瓷表面进行了纳米压痕测试，并比较了它们的机械性能。用扫描电子显微镜检查代表性样品。在所有样品中，釉质表面的机械性能因酸蚀刻而显着降低。然而，两个区域（蚀刻的和树脂渗透的搪瓷）的机械性能在抛光和浸泡 7 天后都显示出恢复。与单独使用 NF 或 S-PRG 浆料抛光相比，使用 NF + S-PRG 浆料抛光导致机械性能显着恢复，并且再矿化与 F 浆料相同。在每个抛光程序和所有抛光组浸泡 7 天后，多孔蚀刻牙釉质表面都填充了再矿化层。使用 NF + S-PRG 膏抛光可以促进去除托槽后牙釉质的再矿化。