Journal ArticleDOI
A mechanism for incorporation of carbonate into apatite
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TLDR
A structural mechanism for the incorporation of impurities during hydrolysis of octacalcium phosphate is presented, of particular importance since the presence of carbonate in human enamel appears to be related to caries susceptibility.Abstract:
Octacalcium phosphate (Ca8H2(PO4)6·5H2O) is considered to be a precursor in the formation of apatite in bones and teeth; a crucial step for incorporation of impurities appears to occur during its hydrolysis. The present study examines the role that octacalcium phosphate plays in the process of incorporation of carbonate into apatite. Chemical, X-ray diffraction, and infrared techniques were used.read more
Citations
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Processing and properties of hydroxyapatite-based biomaterials for use as hard tissue replacement implants
TL;DR: A review of the past, present, and future of the hydroxyapatite (HAp)-based biomaterials from the point of view of preparation of hard tissue replacement implants is presented in this paper.
Journal ArticleDOI
Synthesis and characterization of hydroxyapatite crystals: A review study on the analytical methods
TL;DR: From the experimental processes and the characterization of the crystals it was concluded that aging and precipitation kinetics are critical for the purity of the product and its crystallographic characteristics.
Journal ArticleDOI
Biomimetic Hydroxyapatite Coating on Metal Implants
TL;DR: In this paper, a biomimetic coating was applied on titanium and porous-tantalum implants to facilitate rapid bone formation around the implant, reducing therewith the patient's recovery time after surgery.
Journal ArticleDOI
Molecular Mechanisms of Dental Enamel Formation
James P. Simmer,Alan G. Fincham +1 more
TL;DR: Structural analyses of recombinant amelogenin are consistent with a functional role in establishing and maintaining the spacing between enamel crystallites, and may regulate crystal habit by binding to specific faces of the mineral and inhibiting growth.
Journal ArticleDOI
Bone formation enhanced by implanted octacalcium phosphate involving conversion into Ca-deficient hydroxyapatite
Osamu Suzuki,Shinji Kamakura,Takenobu Katagiri,Masanori Nakamura,Baohong Zhao,Yoshitomo Honda,Ryutaro Kamijo +6 more
TL;DR: Results suggest that OCP supports appositional bone formation and OCP-apatite conversion may be involved in this stimulatory capacity of OCP.
References
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Journal ArticleDOI
Octacalcium Phosphate and Hydroxyapatite: Crystallographic and Chemical Relations between Octacalcium Phosphate and Hydroxyapatite
TL;DR: Octacalcium Phosphate and Hydroxyapatite: Crystallographic and Chemical Relations between Octacalium Phosphates and Hydroxypatite as mentioned in this paper.
Journal ArticleDOI
The determination of metals in blood serum by atomic absorption spectroscopy—I. Calcium
TL;DR: The calcium content of blood serum can be accurately determined on 0.1-0.25 ml samples by atomic absorption measurements in an air-acetylene flame after removal of the proteins by coagulation and centrifuging.
Journal ArticleDOI
Effect of Carbonate on the Lattice Parameters of Apatite
TL;DR: The theory that carbonate groups substitute for the phosphate groups in the apatite structure of both the mineral carbonate apatites and the calcified tissues of teeth and bone is compatible with the decreased a-axis which accompanies CO3 inclusion in the mineral apatITE.
Journal ArticleDOI
The maturation of crystalline calcium phosphates in aqueous suspensions at physiologic pH.
Edward D. Eanes,J. L. Meyer +1 more
TL;DR: The observed structural and compositional changes are not inconsistent with the perfection of an initially defective apatite, but the changes in crystal morphology and the anomalous behavior of the reaction solution may more accurately reflect a conversion of the ACP first into an OCP-like crystalline phase which subsequently hydrolyzes into apatites.