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| 題名: | Evolution and function of dinosaur teeth at ultramicrostructural level revealed using synchrotron transmission X-ray microscopy |
| 作者: | 盧乙嘉;Wang, Chun-Chieh;Song, Yen-Fang;Song, Sheng-Rong;Ji, Qiang;Chiang, Cheng-Cheng;Meng, Qingjin;Li, Haibing;Hsiao, Kiko;Lu, Yi-Chia;Shew, Bor-Yuan;Huang, Timothy;Reisz, Robert R. |
| 貢獻者: | 地球科學學院應用地質研究所 |
| 關鍵詞: | 14/63;631/181/2806;631/181/414;Animals;Biological Evolution;Dentin - diagnostic imaging;Dentin - ultrastructure;Dinosaurs - classification;Fossils;Humanities and Social Sciences;Imaging, Three-Dimensional;Microscopy, Electron, Scanning;multidisciplinary;Phylogeny;Porosity;Radiography;Science;Synchrotrons;X-Rays |
| 日期: | 2015-10-29 |
| 上傳時間: | 2026-04-23 14:57:52 (UTC+8) |
| 出版者: | Nature Publishing Group;London: Nature Publishing Group UK |
| 摘要: | 摘要： The relationship between tooth form and dietary preference is a crucial issue in vertebrate evolution. However, the mechanical properties of a tooth are influenced not only by its shape but also by its internal structure. Here, we use synchrotron transmission X-ray microscopy to examine the internal microstructures of multiple dinosaur teeth within a phylogenetic framework. We found that the internal microstructures of saurischian teeth are very different from advanced ornithischian teeth, reflecting differences in dental developmental strategies. The three-tissue composition (enamel–mantle dentin–bulk dentin) near the dentinoenamel junction (DEJ) in saurischian teeth represents the primitive condition of dinosaur teeth. Mantle dentin, greatly reduced or absent from DEJ in derived ornithischian teeth, is a key difference between Saurischia and Ornithischia. This may be related to the derived herbivorous feeding behavior of ornithischians, but interestingly, it is still retained in the herbivorous saurischian sauropods. The protective functions of mantle dentin with porous microstructures between enamel and bulk dentin inside typical saurischian teeth are also discussed using finite-element analysis method. Evolution of the dental modifications in ornithischian dinosaurs, with the absence of mantle dentin, may be related to changes in enamel characteristics with enamel spindles extending through the DEJ.
其他題名： Sci Rep
出版者： London: Nature Publishing Group UK
出版日期： 2015-10-29
出處： Scientific reports, 2015-10, Vol.5 (1), p.15202-15202, Article 15202
資源來源： Springer OA
版權： The Author(s) 2015
版權： Copyright © 2015, Macmillan Publishers Limited 2015 Macmillan Publishers Limited
識別號： ISSN: 2045-2322
識別號： EISSN: 2045-2322
識別號： DOI: 10.1038/srep15202
識別號： PMID: 26512629 |
| 顯示於類別: | [應用地質研究所] 期刊論文
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