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酸碱性化学物质对硅酸三钙基牙科生物材料的影响。

Acidic and alkaline chemicals' influence on a tricalcium silicate-based dental biomaterial.

机构信息

Discipline of Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong.

Dentsply International, Tulsa, Oklahoma.

出版信息

J Biomed Mater Res B Appl Biomater. 2019 Feb;107(2):377-387. doi: 10.1002/jbm.b.34129. Epub 2018 Apr 15.

Abstract

Bioactive hydraulic tricalcium silicate materials are commonly used in several dental procedures. Mineral Trioxide Aggregate (MTA) is one such material, which is used in a variety of clinical applications, the most recent of which is root canal sealing material, during which, the MTA potentially comes in contact with remnants of the chemical agents used for disinfecting root canals. The effects of commonly used root canal irrigating solutions on MTA have not been investigated in depth, thus far. The aim of this study was to determine the effect of five common chemical agents used in root canal preparation (sodium hypochlorite/NaOCl, ethylene diaminetetraacetic acid/EDTA, mixture of sodium hypochlorite and etidronic acid/NaOCl + EA, mixture of EDTA and Chlorhexidine/QMix, or saline) on a commercial tricalcium silicate (MTA Plus). Samples were analyzed using scanning electron microscopy with energy dispersive spectroscopy, X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy and Inductively coupled plasma techniques to see effects of phases formed and calcium ion release. Specimens immersed in NaOCl and NaOCl + EA had strong peaks for calcium hydroxide, but materials exposed to EDTA and QMix had lesser XRD peaks for calcium hydroxide. The calcium hydroxide peak in the XRD indicates hydration of tricalcium silicate and formation of amorphous calcium silicate hydrate. Calcium released from samples immersed in EDTA and NaOCl was less than in NaOCl + EA and QMix solutions. Fewer calcium phosphate crystals and less calcium hydroxide were observed with the samples in NaOCl, EDTA and QMix, which could have an important impact as it negatively influences the bioactivity. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 107B: 377-387, 2019.

摘要

生物活性硅酸三钙材料通常用于多种牙科手术中。矿物三氧化物聚合体(MTA)就是其中一种材料,它被应用于多种临床应用中,最近的一种是根管封闭材料,在此过程中,MTA 可能会接触到用于消毒根管的化学药剂残留物。到目前为止,还没有深入研究常用根管冲洗液对 MTA 的影响。本研究的目的是确定五种常用根管预备化学药剂(次氯酸钠/NaOCl、乙二胺四乙酸/EDTA、次氯酸钠和依地酸/NaOCl+EA 混合物、EDTA 和洗必泰/QMix 混合物或生理盐水)对商业硅酸三钙(MTA Plus)的影响。使用扫描电子显微镜和能量色散光谱、X 射线衍射(XRD)、傅里叶变换红外光谱和电感耦合等离子体技术对样品进行分析,以观察形成的相和钙离子释放的影响。浸泡在 NaOCl 和 NaOCl+EA 中的样品具有很强的氢氧化钙峰,但暴露于 EDTA 和 QMix 的材料的氢氧化钙 XRD 峰较小。XRD 中的氢氧化钙峰表明硅酸三钙的水化和无定形硅酸钙水合物的形成。浸泡在 EDTA 和 NaOCl 中的样品释放的钙离子少于浸泡在 NaOCl+EA 和 QMix 溶液中的样品。在 NaOCl、EDTA 和 QMix 中,观察到较少的磷酸钙晶体和较少的氢氧化钙,这可能会产生重要影响,因为它会对生物活性产生负面影响。©2018 Wiley Periodicals, Inc. J 生物医学材料研究杂志 B:应用生物材料,107B:377-387,2019。

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