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Literature DB >> 1000355

An X-ray diffraction investigation of age-related changes in the crystal structure of bone apatite.

Abstract

Evidence relating to the existence of crystalline bone mineral in vivo is considered, and bone apatite crystal structure investigated using an x-ray powder diffraction technique. Specimens of femoral compacta excised post-mortem from male and female subjects ranging from 3 1/2 years to 87 years of age have been studied. Values of the ratio c/a of bone apatite crystal cell axes for females are significantly higher (p less than 0.05) than for males. Moreover, significant change of c/a with age is observed for males (p = 0.0005) but not for females (p = 0.30). Differences in c/a are interpreted as indicating substitution of constituent ions in the bone apatite crystals.

Entities: Gene

Mesh：

Substances：
Hydroxyapatites

Year: 1976 PMID： 1000355 DOI： 10.1007/bf02010360

Source DB: PubMed Journal: Calcif Tissue Res ISSN： 0008-0594

38 in total

1. Biophysical analyses of the formation and structure of human fetal bone; a microradiographic and x-ray crystallographic study.

Authors: G WALLGREN
Journal: Acta Paediatr Suppl Date: 1957-07

An X-ray diffraction investigation of age-related changes in the crystal structure of bone apatite.

1. Biophysical analyses of the formation and structure of human fetal bone; a microradiographic and x-ray crystallographic study.

2. The interpretation of the x-ray diffractograms obtained from human dental enamel.

3. The crystal chemistry of carbonate apatities and their relationship to the composition of calcified tissues.

Review 4. Implications of atomic substitutions and other structural details in apatites.

5. Calcium phosphate formation in vitro. II. Effects of environment on amorphous-crystalline transformation.

6. Formation of polycrystalline aggregates in mineral and biological systems.

7. Changes in the degree of orientation of bone materials with age in the human femur.

8. Mechanical influences in bone remodeling. Experimental research on Wolff's law.

9. Use of x-ray diffraction method in investigations on mineral substances of bone and callus.

10. [Some crystallographic and optic properties of different apatites].

1. Lattice energy and mechanical stiffness of hydroxyapatite.

2. Mineral phase in experimental ectopic calcification induced by lead acetate in the rat.

3. Effect of vitamin D deficiency on bone formation in the chick.

4. Rietveld refinement on x-ray diffraction patterns of bioapatite in human fetal bones.

5. Understanding nanocalcification: a role suggested for crystal ghosts.