• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Prosthetic Dentistry >Improvement to the marginal coping fit of commercially pure titanium cast in phosphate-bonded investment by using a simple pattern coating technique
【24h】

Improvement to the marginal coping fit of commercially pure titanium cast in phosphate-bonded investment by using a simple pattern coating technique

机译：通过使用简单的图案涂层技术，改善磷酸盐粘结投资中的商业纯钛铸件的边缘应付配合

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Statement of problem: Coatings of zirconite, Y 2O 3 or ZrO 2 on wax patterns before investing in phosphate-bonded investments have been recommended to reduce the reaction layer in titanium castings, but they are not easily obtainable. Spinel-based investments are relatively stable with molten titanium and could be used as coatings to improve the quality of castings made with those investments. Purpose: The purpose of this study was to evaluate the effect of pattern coating with a commercial spinel-based investment before investing in 1 of 3 phosphate-bonded inves tments on the marginal coping fit and surface roughness of commercially pure titanium castings. Material and methods: Ten square acrylic resin patterns (12 × 12 × 2 mm) per group were invested in the phosphate-bonded investments Rematitan Plus (RP), Rema Exakt (RE), and Castorit Super C (CA) with or without a coating of the spinel-based investment, Rematitan Ultra (RU). After casting, the specimens were cleaned and the surface roughness was measured with a profilometer. Copings for dental implants with conical abutment were invested, eliminated, and cast as previously described. The copings were cleaned and misfit was measured with a profile projector (n=10). For both tests, the difference between the mean value of RU only and each value of the phosphate-bonded investment was calculated, and the data were analyzed by 2-way ANOVA and Tukey's HSD test (α=.05). In addition, the investment roughness was measured in bar specimens (30 × 10 × 10 mm), and the data (n=10) were analyzed by 1-way ANOVA and Tukey's HSD post hoc test (α=.05). Results: Two-way ANOVA for casting surface roughness was significant because of the investment, the coating technique, and the interaction between variables. One-way ANOVA was performed to prove the interaction term, and Tukey's post hoc test showed that RP with coating had the lowest mean, while RP had the highest. CA with coating was not different from RP with coating or CA without coating. RE with coating was similar to CA, while RE was different from all groups. For coping marginal fit, the 2-way ANOVA was significant for the investment, the coating technique, and the interaction between variables. The interaction was analyzed by1-way ANOVA and Tukey's HSD test that showed no significant difference among the coated groups, which had better marginal fit than the groups without coating. Among the groups without coating, CA had significant lower marginal misfit than RP, while RE was not different from CA and RP. For the investment surface roughness, the 1-way ANOVA was significant. CA and RU were smoother than RE and RP (P.001). Conclusions: The coating technique improved the quality of castings fabricated with phosphate-bonded investments.
机译：问题陈述：建议在投资于磷酸盐粘结的投资之前，先在蜡模上涂锆石，Y 2O 3或ZrO 2，以减少钛铸件中的反应层，但不易获得。尖晶石为基础的投资与熔融钛相对稳定，可以用作涂料以改善用这些投资制成的铸件的质量。目的：这项研究的目的是在以商业尖晶石为基础的投资之前，先评估图案涂层的效果，然后再投资3种磷酸盐结合的投资中的1种，以评估商业纯钛铸件的边缘配合和表面粗糙度。材料和方法：将每组十个方形丙烯酸树脂图案（12×12×2 mm）分别投资于磷酸酯键合的Rematitan Plus（RP），Rema Exakt（RE）和Castorit Super C（CA）。尖晶石型投资产品Rematitan Ultra（RU）的涂层。铸造后，清洁样品并用轮廓仪测量表面粗糙度。如前所述，对带有圆锥形基台的牙科植入物的顶盖进行了投资，淘汰和铸造。清洁顶盖，并用轮廓投影仪（n = 10）测量失配。对于这两个测试，都计算出仅RU平均值与每个磷酸酯键合投资额之间的差，并通过2-way ANOVA和Tukey HSD测试（α= .05）分析数据。此外，在条形试样（30×10×10 mm）中测量了投资粗糙度，并通过1次方差分析和Tukey HSD事后检验（α= .05）对数据（n = 10）进行了分析。结果：由于投资，涂层技术以及变量之间的相互作用，用于铸造表面粗糙度的双向方差分析非常重要。进行了单向方差分析以证明相互作用项，Tukey的事后检验表明，带涂层的RP的平均值最低，而RP的平均值最高。带涂层的CA与带涂层的RP或不带涂层的CA没有区别。带涂层的RE与CA相似，而所有组的RE均不同。对于应对边际拟合，2-way ANOVA对于投资，涂层技术以及变量之间的相互作用具有重要意义。通过单向方差分析和Tukey的HSD测试对相互作用进行了分析，结果表明，包被的组之间无显着差异，与没有包被的组相比，边缘适应性更好。在没有涂层的组中，CA的边缘失配率明显低于RP，而RE与CA和RP并无差异。对于投资表面粗糙度，单向方差分析非常重要。 CA和RU比RE和RP光滑（P <.001）。结论：涂层技术改善了用磷酸盐粘结的铸件制造的铸件的质量。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号