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首页> 外文期刊>Journal of applied statistics >Improving teeth aesthetics using a spatially shared-parameters model for independent regular lattices
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Improving teeth aesthetics using a spatially shared-parameters model for independent regular lattices

机译:使用空间共享参数模型改进牙齿美学,用于独立普通格子

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摘要

An important feature in dentistry is teeth gloss. During an intervention, the doctor applies a resin and a polishing to achieve the lowest roughness and the highest gloss possible. This work aims to evaluate the effect of four polishing protocols in teeth surface roughness and gloss when combined with two different resins and eventually indicate the best combination (treatment). An atomic force microscope is used for measuring the in vitro roughness of a dental surface surrogate. We consider a shared parameters approach for linking the information carried by those two correlated variables. The model fitted to the gloss considers some features of the roughness, namely the information conveyed by a set of spatial structured random effects, specific to each treatment, and the within treatment variance, which allows interpreting how the heterogeneity and the variability of the surface roughness impacts a tooth gloss. The statistical model here developed is an alternative to the "traditional" two-way ANOVA used in dentistry journals. The results, using the recent R-NIMBLE package in R, show that variability characteristics of the surface's roughness are central for explaining differences among the gloss achieved after each treatment and not just the mean roughness of that surface.
机译:牙科的一个重要特征是牙齿光泽。在干预期间,医生施加树脂和抛光以实现最低的粗糙度和最高光泽。这项工作旨在评估四种抛光方案在与两种不同树脂组合时牙齿表面粗糙度和光泽度的影响,最终表示最佳组合(处理)。原子力显微镜用于测量牙科表面替代的体外粗糙度。我们考虑一个共享参数方法,用于将这两个相关变量携带的信息链接。装配到光泽的模型考虑了粗糙度的一些特征,即由一组空间结构化随机效应传送的信息,特定于每个治疗,以及治疗方差,这允许解释异质性如何和表面粗糙度的变化影响牙齿光泽。这里开发的统计模型是牙科期刊中使用的“传统”双向ANOVA的替代方案。结果,使用最近的R中的R-inimble封装,表明表面粗糙度的变化特性是解释每种治疗后达到的光泽度的差异的核心,而不仅仅是该表面的平均粗糙度。

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