Objectives

Dental materials that can form apatite offer the potential to not only prevent demineralisation but enhance remineralisation of the enamel. The objective of this study was to investigate the ability of a novel BAG-resin adhesive to form apatite in 3 immersion media.

Methods

A novel fluoride containing BAG-resin adhesive described previously, with 80% by weight filler load, was used to fabricate 90 disks. Each disk was immersed in 10 ml of either tris buffer (TB), or artificial saliva at pH = 7 (AS7) or pH = 4 (AS4). At ten time points (from 6 h to 6 months), three disks were taken from each of the solutions and investigated by ATR-FTIR, XRD and SEM.

Results

The BAG-resin formed apatite on the disk surface, which increased with time, especially in AS4 and AS7. The apatite crystals formed in AS7 were highly oreintated and the oreintation increased with time.

Significance

This novel BAG-resin adhesive differs from the currently used adhesives by promting apatite formation, particularly under acidic conditions. Thus, applied in the clinical situation to bond orthodontic brackets, it may discourage the frequent occurrence of white spot lesion formation around the brackets.

中文翻译：

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用于正畸粘合剂的含氟生物活性玻璃复合材料—磷灰石形成特性

目标

可以形成磷灰石的牙科材料不仅可以防止脱矿质，而且可以增强牙釉质的再矿化潜力。这项研究的目的是研究一种新型的BAG树脂粘合剂在3种浸没介质中形成磷灰石的能力。

方法

先前所述的新型的含氟化物的BAG-树脂粘合剂具有80重量％的填料负载，被用于制造90个盘。将每个圆盘浸入10 ml pH = 7（AS7）或pH = 4（AS4）的tris缓冲液（TB）或人工唾液中。在十个时间点（从6小时到6个月），从每个溶液中取出三个磁盘，并通过ATR-FTIR，XRD和SEM进行研究。

结果

BAG树脂在磁盘表面形成磷灰石，磷灰石随时间增加，特别是在AS4和AS7中。在AS7中形成的磷灰石晶体高度取向，并且取向随着时间增加。

意义

这种新型的BAG-树脂粘合剂与当前使用的粘合剂的不同之处在于特别是在酸性条件下促进了磷灰石的形成。因此，在临床上应用到粘结正畸托槽时，它可能会阻止托槽周围白斑病变形成的频繁发生。