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Glass ionomer cements: Effect of strontium substitution on esthetics, radiopacity and fluoride release

机译:玻璃离聚物水泥:锶替代对美学,射线不透性和氟化物释放的影响

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摘要

Objective. SrO and SrF_2 are widely used to replace CaO and CaF_2 in ionomer glasses to produce radiopaque glass ionomer cements (GIC). The purpose of this study was to evaluate the effects of this substitution on release of ions from GIC as well as its effect on esthetics (translucency) and radiopacity. Materials and methods. Cements were produced from ionomer glasses with varying content of Sr, Ca and F. The cements were stored in dilute acetic acid (pH 4.0) for up to 7 days at 37 ℃. Thereafter, the cements were removed and the solution was tested for F~-, Sr~(2+), Ca~(2+), and Al~(3+) release. Radiopacity and translucency were measured according to BS EN ISO 9917-1:2003. Results. Ion release was linear to t~(1/2) suggesting that this is a diffusion controlled mechanism rather than dissolution. The fluoride release from the cements is enhanced where some or all calcium is replaced by strontium. Radiopacity shows a strong linear correlation with Sr content. All cements were more opaque than the C_(0.70) 0.55 standard but less opaque than the C_(0.70) 0.90 standard which is the limit for the ISO requirement for acceptance. Significance. This study shows that the replacement of calcium by strontium in a glass ionomer glass produces the expected increase in radiopacity of the cement without adverse effects on visual properties of the cement. The fluoride release from the cements is enhanced where some or all calcium is replaced by strontium.
机译:目的。 SrO和SrF_2被广泛用于替代离聚物玻璃中的CaO和CaF_2,以生产不透射线的玻璃离聚物胶粘剂(GIC)。这项研究的目的是评估这种取代对GIC离子释放的影响,以及对美学(半透明)和不透射线的影响。材料和方法。用不同含量的Sr,Ca和F的离聚物玻璃生产水泥。将水泥在稀乙酸(pH 4.0)中于37℃下保存7天。此后,除去水泥,并测试溶液的F〜-,Sr〜(2 +),Ca〜(2+)和Al〜(3+)释放。根据BS EN ISO 9917-1:2003测量射线不透性和半透明性。结果。离子释放与t〜(1/2)呈线性关系,表明这是一种扩散控制的机制而不是溶解。在水泥中部分或全部钙被锶替代的情况下,水泥中氟化物的释放增加。射线不透性与S​​r含量呈强线性相关。所有水泥的不透明性均高于C_(0.70)0.55标准,但不透明性低于C_(0.70)0.90标准,这是ISO验收要求的极限。意义。这项研究表明,在玻璃离聚物玻璃中用锶替代钙可以使水泥的射线不透性得到预期的提高,而对水泥的外观没有不利影响。在水泥中部分或全部钙被锶替代的情况下,水泥中氟化物的释放增加。

著录项

  • 来源
    《Dental materials》 |2014年第3期|308-313|共6页
  • 作者单位

    Dental Physical Sciences Unit, Institute of Dentistry, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK,Dental Physical Sciences Unit, Francis Bancroft Building, Queen Mary University of London, Mile End, Londor E1 4NS, UK;

    Dental Physical Sciences Unit, Institute of Dentistry, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK;

    Dental Physical Sciences Unit, Institute of Dentistry, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK;

    Dental Physical Sciences Unit, Institute of Dentistry, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK;

    Dental Physical Sciences Unit, Institute of Dentistry, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Glass ionomer cements; Radiopacity; Esthetics; Strontium; Fluoride release; Ion release;

    机译:玻璃离聚物水泥;射线不透性;美学;锶;氟化物释放;离子释放;
  • 入库时间 2022-08-18 03:46:56

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