کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
811057 1469135 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Orientation and deformation of mineral crystals in tooth surfaces
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
Orientation and deformation of mineral crystals in tooth surfaces
چکیده انگلیسی

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 cc-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 cc-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.

Figure optionsDownload high-quality image (373 K)Download as PowerPoint slideHighlights
► X-ray diffraction methods were applied to the tooth surface.
► The cc-axis of apatite crystals was oriented to the surface perpendicular direction.
► The (004) lattice plane could be used for strain measurements of the tooth surface.
► The strain measurement was conducted on the tooth specimens under loading.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 10, June 2012, Pages 176–182
نویسندگان
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