...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of dentistry >Optical characteristics of contemporary dental composite resin materials
【24h】

Optical characteristics of contemporary dental composite resin materials

机译：当代牙科复合树脂材料的光学特性

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

Objectives Optical and physical properties of dental restorative composite materials are affected by composition. Basic optical absorption and scattering properties have been derived through the use of a corrected reflectance model, but practical and important optical properties are not easily derived from these basic spectral characteristics. The purposes of this study are to derive and compare colour and translucency characteristics of two cured contemporary nanohybrid composites being marketed as universal composites, and to evaluate colour difference between each composite material and published shade guide data. Methods Previously derived optical scattering and absorption coefficients for five diverse shades of these composite materials were used to calculate the CIE colour parameters of L*, a* and b* at infinite thickness under various illuminants and to derive ideal translucency parameters at various thicknesses using two colour difference formulae. Results Differences were found in the inherent colour parameters and in the translucency parameters between the brands for some of the shades studied. The colour differences of the inherent colours from published shade guide data were always higher than the perceptibility limit, and often higher than the acceptability limit. Conclusions Inherent colours and ideal translucency parameters may be calculated from optical coefficients for a variety of illuminants. Different inherent colour parameters of composite materials marked for the same shade indicate the influence of compositional differences between these materials. Clinical significance Since patients are seen under various illuminations, the ability to assess appearance matching characteristics under diverse illuminants will help assure an optimum match for the patient.
机译：目的牙科修复复合材料的光学和物理性能会受到成分的影响。通过使用校正的反射率模型可以得出基本的光学吸收和散射特性，但是从这些基本光谱特性中不容易得出实用而重要的光学特性。本研究的目的是推导和比较两种以通用复合材料形式出售的现代硫化纳米固化复合材料的颜色和半透明特性，并评估每种复合材料之间的色差和已发布的阴影指南数据。方法使用先前推导的五种不同色度的这些复合材料的光学散射和吸收系数来计算无限大厚度下在各种光源下的L *，a *和b *的CIE颜色参数，并使用两种方法得出各种厚度下的理想半透明参数色差公式。结果对于所研究的某些阴影，品牌之间的固有颜色参数和半透明参数存在差异。来自已发布的阴影指南数据的固有颜色的色差始终高于可感知度极限，并且经常高于可感知度极限。结论可以从各种光源的光学系数计算出固有的颜色和理想的半透明参数。标记为相同阴影的复合材料的不同固有颜色参数指示这些材料之间的成分差异的影响。临床意义由于可以在各种照明下看到患者，因此评估各种照明下的外观匹配特性的能力将有助于确保患者的最佳匹配。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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