Abstract：
:Hydroxyapatite (HA) and beta-tricalcium phosphate (TCP) were studied by computer graphics with a personal computer. Crystal models of fluoridated hydroxyapatite and fluorapatite, in which F- ions are substituted into some or all OH- positions, were also drawn. Data on the structural coordinates of the hydroxyapatite and beta-TCP crystals were put into a protein graphics program in Angstrom units. The connection of each element, with front and rear, was displayed by the shade-line erasing method, and the solidity of the image was expressed by the degree of lightness from the light source. The colour tint was obtained by the Raster graphics method. A fine picture can be obtained with the photo program. Rotating the graphics freely around the X, Y, and Z axes gives a view from any direction. The computer graphics demonstrated visually that F- ions contribute to stabilize the hydroxyapatite crystal and that beta-TCP has an unstable structure due to 0.5 probability of Ca2+ ions and [PO4-Ca-Ca-Ca-PO4] zigzag chain.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Okazaki M,Sato Mdoi
10.1016/0142-9612(90)90081-zsubject
Has Abstractpub_date
1990-10-01 00:00:00pages
573-8issue
8eissn
0142-9612issn
1878-5905pii
0142-9612(90)90081-Zjournal_volume
11pub_type
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