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Post retention with mineral trioxide aggregate and accelerated Portland cement.

机译：用三氧化二矿骨料和加速硅酸盐水泥进行后固位。

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摘要

Perforations occurring during post placement are problematic. Mineral trioxide aggregate (MTA) is slow to set. A trial demonstrated that CaCl2 accelerated the set of Portland cement. Forty single-rooted teeth were sectioned, treated with endodontic therapy and post prepared. The first group contained 20 teeth, evaluated at 72 hours. MTA, Portland cement with 10% CaCl2, 15% CaCl2 and zinc phosphate were used as post cements. The second group was evaluated at 28 days. The posts were cemented with either MTA or zinc phosphate. Instron mechanical testing was used to determine forces needed for post dislodgement. The 72 hour group showed statistically significant higher resistance to dislodgement with zinc phosphate. (p.05) No significance was found between resistance in the experimental groups. The 28 day group posts seated with zinc phosphate had a higher resistance to dislodgement than those with MTA. (p.05) At 28 days, MTA was found to be 28 % weaker than zinc phosphate.
机译：放置后发生穿孔是有问题的。三氧化二矿骨料（MTA）凝固缓慢。一项试验表明，CaCl2促进了波特兰水泥的凝固。将四十根单根牙齿切成薄片，进行牙髓治疗并进行后处理。第一组包含20颗牙齿，评估时间为72小时。 MTA，含10％CaCl2、15％CaCl2的波特兰水泥和磷酸锌用作后期水泥。第二组在28天进行评估。用MTA或磷酸锌将桩固结。 Instron机械测试用于确定后移所需的力。 72小时组在统计学上显示出较高的抗磷酸锌脱位性。 （p <.05）在实验组中的耐药性之间未发现显着性。与磷酸MTA相比，使用磷酸锌的28天小组帖子对脱臼的抵抗力更高。 （p <.05）在28天时，发现MTA比磷酸锌弱28％。

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  • 作者

    Harrington, Pamela P.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Health Sciences Dentistry.
  • 学位 M.S.
  • 年度 2005
  • 页码 65 p.
  • 总页数 65
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 口腔科学;
  • 关键词

  • 入库时间 2022-08-17 11:42:55

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