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牙齿化学的新方法。牙釉质-牙本质交界处的定量分析。

Novel Approach to Tooth Chemistry. Quantification of the Dental-Enamel Junction.

机构信息

ComerLab Dorota Nowak, Radawiec Duży 196, 21-030 Motycz, Poland.

Department of Oral Medicine, Medical University of Lublin, 20-093 Lublin, Poland.

出版信息

Int J Mol Sci. 2021 Jun 2;22(11):6003. doi: 10.3390/ijms22116003.

DOI:10.3390/ijms22116003
PMID:34199407
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8199634/
Abstract

The dentin-enamel junction (DEJ) is known for its special role in teeth. Several techniques were applied for the investigation of the DEJ in human sound molar teeth. The electron (EPMA) and proton (PIXE) microprobes gave consistent indications about the variability of elemental concentrations on this boundary. The locally increased and oscillating concentrations of Mg and Na were observed in the junction, in the layer adhering to the enamel and covering roughly half of the DEJ width. The chemical results were compared with the optical profiles of the junction. Our chemical and optical results were next compared with the micromechanical results (hardness, elastic modulus, friction coefficient) available in the world literature. A strong correlation of both result sets was proven, which testifies to the self-affinity of the junction structures for different locations and even for different kinds of teeth and techniques applied for studies. Energetic changes in tooth strictly connected with crystallographic transformations were calculated, and the minimum energetic status was discovered for DEJ zone. Modeling of both walls of the DEJ from optical data was demonstrated. Comparing the DEJ in human teeth with the same structure found in dinosaur, shark, and alligator teeth evidences the universality of dentin enamel junction in animal world. The paper makes a contribution to better understanding the joining of the different hard tissues.

摘要

牙本质-釉质交界（DEJ）因其在牙齿中的特殊作用而闻名。已经应用了几种技术来研究人类健康磨牙的 DEJ。电子（EPMA）和质子（PIXE）微探针给出了关于此边界处元素浓度变化的一致指示。在交界处、附着在釉质上的层中观察到 Mg 和 Na 的局部浓度增加和波动，大约覆盖 DEJ 宽度的一半。化学结果与交界线的光学轮廓进行了比较。我们的化学和光学结果随后与世界文献中可用的微力学结果（硬度、弹性模量、摩擦系数）进行了比较。证明了这两个结果集之间存在很强的相关性，这证明了不同位置甚至不同类型的牙齿和用于研究的技术的交界结构的自相似性。与结晶转变严格相关的牙齿能量变化被计算出来，并且发现 DEJ 区域的最小能量状态。从光学数据对 DEJ 的两个壁进行建模。将人类牙齿中的 DEJ 与在恐龙、鲨鱼和鳄鱼牙齿中发现的相同结构进行比较，证明了牙本质釉质交界在动物界的普遍性。本文为更好地理解不同硬组织的连接做出了贡献。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/cdd820ae0370/ijms-22-06003-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/40aa5b4df613/ijms-22-06003-g001a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/a49c1139d8a4/ijms-22-06003-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/6598718034e0/ijms-22-06003-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/cdd820ae0370/ijms-22-06003-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/40aa5b4df613/ijms-22-06003-g001a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/2818429d978c/ijms-22-06003-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/cff1b282cffb/ijms-22-06003-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/05b33cd51a78/ijms-22-06003-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/b69d0327af93/ijms-22-06003-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/a409bc05d8cb/ijms-22-06003-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/a49c1139d8a4/ijms-22-06003-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/6598718034e0/ijms-22-06003-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58a2/8199634/cdd820ae0370/ijms-22-06003-g009.jpg

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