分光光度法和XRD分析在烧伤牙残体研究中的应用
Integrating spectrophotometric and XRD analyses in the investigation of burned dental remains
摘要：
热通过破坏有机物和诱导羟基磷灰石晶体生长来改变牙齿的颜色和结晶度。颜色和微晶变化可以使用分光光度计和X射线衍射分析进行量化，但是这些分析通常不用于评估烧伤牙齿残留物。在这项研究中，39颗牙齿在300-1000 $^\circ$ C下焚烧15和30分钟，然后使用分光光度计和X射线衍射仪进行测量。所用的响应变量为亮度、L $^\ast$和色度a $^\ast$和b $^\ast$以及颜色的亮度（白度和黄度）和结晶度的晶体尺寸。统计分析，以确定这些变量的属性显示，黄度和晶体大小的显着影响温度（$p < 0.05$），而热暴露的持续时间没有显示出显着的效果。这项研究表明，包括分光光度计和X射线衍射在调查热牙齿是有用的，以准确地估计牙齿所暴露的温度。
英文摘要：
Heat alters colour and crystallinity of teeth by destruction of the organic content and inducing hydroxyapatite crystal growth. The colour and crystallite changes can be quantified using spectrophotometric and x-ray diffraction analyses, however these analyses are not commonly used in combination to evaluate burned dental remains. In this study, thirty-nine teeth were incinerated at 300-1000$^\circ$C for 15 and 30 minutes and then measured using a spectrophotometer and an x-ray diffractometer. Response variables used were lightness, L$^\ast$, and chromaticity a$^\ast$ and b$^\ast$ and luminance (whiteness and yellowness) for colour, and crystal size for crystallinity. Statistical analysis to determine the attribution of these variables revealed yellowness and crystal size were significantly affected by temperature ($p < 0.05$), whilst duration of heat-exposure showed no significant effect. This study suggests the inclusion of both spectrophotometric and x-ray diffraction in investigating thermal-heated teeth is useful to accurately estimate the temperature teeth are exposed to.
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