Orientation and deformation of mineral crystals in tooth surfaces

• Fujisaki, Kazuhiro

• Todoh, Masahiro

• Niida, Atsushi

• Shibuya, Ryota

• Kitami, Shunsuke

• Tadano, Shigeru

抄録

Tooth enamel is the hardest material in the human body, and it is mainly composed of hydroxyapatite (HAp)-like mineral particles. As HAp has a hexagonal crystal structure, X-ray diffraction methods can be used to analyze the crystal structure of HAp in teeth. Here, the X-ray diffraction method was applied to the surface of tooth enamel to measure the orientation and strain of the HAp crystals. The c-axis of the hexagonal crystal structure of HAp was oriented to the surface perpendicular to the tooth enamel covering the tooth surface. Thus, the strain of HAp at the surface of teeth was measured by X-ray diffraction from the (004) lattice planes aligned along the c-axis. The X-ray strain measurements were conducted on tooth specimens with intact surfaces under loading. Highly accurate strain measurements of the surface of tooth specimens were performed by precise positioning of the X-ray irradiation area during loading. The strains of the (004) lattice plane were measured at several positions on the surface of the specimens under compression along the tooth axis. The strains were obtained as tensile strains at the labial side of incisor tooth specimens. In posterior teeth, the strains were different at different measurement positions, varying from tensile to compressive types.

収録刊行物

• Journal of the Mechanical Behavior of Biomedical Materials

  Journal of the Mechanical Behavior of Biomedical Materials 10 176-182, 2012-06

  Elsevier

キーワード

• Biomechanics
• Tooth enamel
• Hydroxyapatite
• X-ray diffraction
• Crystal orientation
• Strain

詳細情報

• CRID: 1050564288965266432
• NII論文ID: 120004405559
• NII書誌ID: AA12344261
• HANDLE: 2115/49714
• ISSN: 17516161
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles