SEM and Microprobe X-ray Analysis of Dentin-Ripple in Teeth of a Fossil Oreodont

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概要

• 論文の詳細を見る

• SEM secondary- and backscattered-electron image observations were conducted on fossil oreodont teeth to study the distribution, fine structure, and element content in the dentinal imbrications. Canines and molars were removed from a fossil oreodont, sectioned either longitudinally or horizontally, and then polished to a glass-like finish. The dentin surface was etched with a weak acid, coated with gold or carbon, and then observed and analyzed under a SEM connected to an energy-dispersive X-ray microanalyzer (EDX). The cut surface of the dentin showed many globular structures composed of concentric rings interconnected with laminated parallel layers, revealing the incremental lines in the oreodont dentin. The SEM study also showed an alternate arrangement of low-contrast, low, and smooth striations measuring 0.9μm in width, and another component of high-contrast highly elevated, and rough striations measuring 2.3μm in width in the so-called dentin-ripple. EDX analysis showed the former to have a lower content of both P and Ca than the latter, which finding seemed to indicate a different degree of calcification between them. Furthermore, the region underneath the mantle dentin of the occlusal surface showed well-developed dentinal ripples. As the dentin shifted pulpally and radicularly, the imbrications became scarce and partially disappeared.

• 大阪歯科学会の論文

著者

• Iwai-liao Yasutomo

  Department Of Oral Anatomy Osaka Dental University

• HIGASHI Yoshikage

  Department of Oral Anatomy, Osaka Dental University

• Fujita Koji

  Department Of Oral Anatomy Osaka Dental University

• Fujita Koji

  Department Of Applied Science For Integrated System Engineering Graduate School Of Engineering Kyush

• Higashi Yoshikage

  Department Of Oral Anatomy Osaka Dental University

• Soeda Y

  Department Of Oral Anatomy Osaka Dental University

• Soeda Yoshihiro

  Department Of Material Systems Engineering Faculty Of Technology Tokyo University Of Agriculture And

• TADA Itsu

  Department of Oral Anatomy, Osaka Dental University

• OYA Takujj

  Department of Oral Anatomy, Osaka Dental University

• Tada Itsu

  Department Of Oral Anatomy Osaka Dental University

• Oya Takujj

  Department Of Oral Anatomy Osaka Dental University

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