含氟生物活性玻璃复合材料用于正畸粘合剂-磷灰石形成特性。
Fluoride containing bioactive glass composite for orthodontic adhesives - Apatite formation properties.
机构信息
Queen Mary University of London, Barts & The London School of Medicine and Dentistry, Institute of Dentistry, Centre for Oral Bioengineering, Mile End Road, London E1 4NS, UK; University of Anbar, College of Dentistry, Department of Paediatric, Orthodontic and Preventive Dentistry, P.O. Box 55, Ramadi, Iraq.
Queen Mary University of London, Barts & The London School of Medicine and Dentistry, Institute of Dentistry, Centre for Oral Bioengineering, Mile End Road, London E1 4NS, UK.
出版信息
Dent Mater. 2018 Aug;34(8):1127-1133. doi: 10.1016/j.dental.2018.04.009. Epub 2018 May 17.
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 10ml of either tris buffer (TB), or artificial saliva at pH=7 (AS7) or pH=4 (AS4). At ten time points (from 6h 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.
目的
能够形成磷灰石的牙科材料不仅有潜力预防脱矿质，还有助于增强牙釉质的再矿化。本研究的目的是研究一种新型 BAG-树脂胶粘剂在 3 种浸提介质中形成磷灰石的能力。
方法
使用先前描述的一种新型含氟 BAG-树脂胶粘剂，其填料负载为 80%，用于制造 90 个圆盘。每个圆盘浸入 10ml tris 缓冲液（TB）、pH=7 的人工唾液（AS7）或 pH=4 的人工唾液（AS4）中。在十个时间点（从 6 小时到 6 个月），从每种溶液中取出三个圆盘，通过衰减全反射傅里叶变换红外光谱（ATR-FTIR）、X 射线衍射（XRD）和扫描电子显微镜（SEM）进行研究。
结果
BAG-树脂在圆盘表面形成磷灰石，随着时间的推移而增加，尤其是在 AS4 和 AS7 中。在 AS7 中形成的磷灰石晶体高度取向，且取向随时间增加。
意义
这种新型 BAG-树脂胶粘剂与目前使用的胶粘剂不同，能够促进磷灰石的形成，尤其是在酸性条件下。因此，将其应用于临床粘结正畸托槽时，可能会减少托槽周围频繁出现的白垩斑形成。
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