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温度对不同年龄组离体牙的影响：一项初步研究。

The effects of temperature on extracted teeth of different age groups: A pilot study.

作者信息

George Renjith, Tan Wesley Joel, Shih Yi Agnes Liong, Donald Preethy Mary

机构信息

Department of Oral Pathology, Faculty of Dentistry, Melaka-Manipal Medical College, Melaka, Malaysia.

Department of First Year Dental Officer, Ministry of Health, Faculty of Dentistry, Melaka-Manipal Medical College, Melaka, Malaysia.

出版信息

J Forensic Dent Sci. 2017 Sep-Dec;9(3):165-174. doi: 10.4103/jfo.jfds_25_16.

DOI:10.4103/jfo.jfds_25_16
PMID:29657495
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5887641/
Abstract

CONTEXT

Type of dentition and age related changes may affect the behavior of dental hard tissues under thermal stress.

AIM

This study was conducted to analyze the effects of varying temperatures on extracted teeth of different age groups in a simulated laboratory set up.

SETTINGS AND DESIGN

Experimental pilot study.

METHODS AND MATERIAL

Extracted teeth from three age groups (deciduous, young permanent and adult permanent) were collected and were exposed to three different temperatures (400°C, 700°C and 1000°C) in a laboratory set up. Post-test changes were analyzed visually and radiographically.

RESULTS

(1) The colour changes of the teeth may serve as an indicator for the temperature to which they were exposed. (2) Deciduous teeth tolerated thermal stress with lesser morphological changes compared to young and adult permanent teeth. (3) Coronal dentin of elderly permanent teeth appeared to be more resistant to thermal stress compared to that of young permanent teeth. (4) The root portion of the teeth showed better tolerance to temperature while crown was fragmented easily under thermal stress.

CONCLUSION

The age factor and type of the dentition may influence the heat induced changes in teeth. These variables should be taken into consideration while applying comparative dental identification methods where dental hard tissues are exposed to extreme temperatures.

摘要

背景

牙列类型和与年龄相关的变化可能会影响牙体硬组织在热应激下的表现。

目的

本研究旨在分析在模拟实验室环境中不同温度对不同年龄组拔除牙齿的影响。

设置与设计

实验性初步研究。

方法与材料

收集来自三个年龄组（乳牙、年轻恒牙和成年恒牙）的拔除牙齿，并在实验室环境中使其暴露于三种不同温度（400°C、700°C和1000°C）下。测试后通过视觉和影像学分析变化情况。

结果

（1）牙齿的颜色变化可作为其暴露温度的指标。（2）与年轻恒牙和成年恒牙相比，乳牙在热应激下形态变化较小，能耐受热应激。（3）与年轻恒牙相比，老年恒牙的冠部牙本质似乎对热应激更具抵抗力。（4）牙齿的根部对温度耐受性较好，而牙冠在热应激下容易破碎。

结论

年龄因素和牙列类型可能会影响牙齿的热诱导变化。在应用牙齿硬组织暴露于极端温度的比较牙科鉴定方法时，应考虑这些变量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/03fa2ba513e6/JFDS-9-165-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/703cc031707c/JFDS-9-165-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/2be6a90fe3a4/JFDS-9-165-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/bec173846398/JFDS-9-165-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/5f421cc3d11b/JFDS-9-165-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/85272e05ab5e/JFDS-9-165-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/b03621138466/JFDS-9-165-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/c592453470ce/JFDS-9-165-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/846de97b2a1c/JFDS-9-165-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/03fa2ba513e6/JFDS-9-165-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/703cc031707c/JFDS-9-165-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/2be6a90fe3a4/JFDS-9-165-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/bec173846398/JFDS-9-165-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/5f421cc3d11b/JFDS-9-165-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/85272e05ab5e/JFDS-9-165-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/b03621138466/JFDS-9-165-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/c592453470ce/JFDS-9-165-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/846de97b2a1c/JFDS-9-165-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d9e/5887641/03fa2ba513e6/JFDS-9-165-g012.jpg

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本文引用的文献

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2
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J Forensic Odontostomatol. 2009 Dec 1;27(2):9-19.
3
Effects of high temperature on different restorations in forensic identification: Dental samples and mandible.高温对法医鉴定中不同修复体的影响：牙齿样本与下颌骨
基于计算机视觉的牙科 X 射线影像的自动人体识别。
Sci Rep. 2020 Mar 2;10(1):3801. doi: 10.1038/s41598-020-60817-6.
J Forensic Dent Sci. 2010 Jan;2(1):37-43. doi: 10.4103/0974-2948.71056.
4
Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: an in vitro study.透射光和偏振光显微镜下乳磨牙与恒磨牙牙本质的比较：一项体外研究
J Indian Soc Pedod Prev Dent. 2010 Jul-Sep;28(3):167-72. doi: 10.4103/0970-4388.73793.
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Crystal structure studies of human dental apatite as a function of age.作为年龄函数的人类牙齿磷灰石晶体结构研究。
Int J Biomater. 2009;2009:698547. doi: 10.1155/2009/698547. Epub 2009 Jun 16.
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Microsc Res Tech. 2010 May;73(5):572-7. doi: 10.1002/jemt.20796.
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