Carbonation of Enamal Apatite Crystals: Lattice Substitutions and Surface Adsorption.

Sato, Kaori; Ikenoya, Osamu; Shimazu, Yoshihito; Aoba, Takaaki

doi:10.2330/joralbiosci1965.41.61

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Furthermore, it is important that the CO 2 molecule can be inserted into the apatite lattice. This is the first report of a CA film with CO 2 molecules inserted without any hydroxy groups in the apatite skeleton; however, there are several reports on apatite crystals with both inserted CO 2 molecules and hydroxy groups [36][37][38][39].…”

Section: Discussionmentioning

confidence: 96%

“…The bands around 1639 and 3435 cm −1 are likely due to water molecules, but not the hydroxy group. The peak at 2343 cm −1 , which was observed for the sprayed film without any heat treatment and those heat-treated at 400°C and 500°C, was due to the asymmetric stretching mode of the CO 2 molecule [36]; the corresponding peaks for the two films heat-treated above 600°C were extremely small. Fig.…”

Section: Characterization Of the Powder Obtained From The Sprayed Filmmentioning

confidence: 96%

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Application of carbonated apatite coating on a Ti substrate by aqueous spray method

Mochizuki

Takano

Hayakawa

et al. 2013

Materials Science and Engineering: C

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Section: Discussionmentioning

confidence: 96%

Section: Characterization Of the Powder Obtained From The Sprayed Filmmentioning

confidence: 96%

Application of carbonated apatite coating on a Ti substrate by aqueous spray method

Mochizuki

Takano

Hayakawa

et al. 2013

Materials Science and Engineering: C

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“…The bands around 1639 and 3435 cm −1 are likely due to water molecules, but not the hydroxy group. The peak at 2343 cm −1 , which was observed for both the sprayed film before heat treatment and those heat treated at 400°C and 500°C, can be assigned to the asymmetric stretching mode of the CO 2 molecule [41]; the corresponding peaks for the two films heat treated above 600°C were extremely small. This unexpected behavior of the films heat treated above 600°C may be due to crystallite decay that occurs by elimination of CO 2 molecules that were initially inserted in the apatite skeleton, as shown in the FT-IR spectra.…”

Section: Characterizations Of the Fabricated Filmmentioning

confidence: 92%

Fabrication of Apatite Films on Ti Substrates of Simple and Complicated Shapes by Using Stable Solutions of Ca Complex

Mochizuki¹,

Sato²,

Hayakawa³

2020

Methods for Film Synthesis and Coating Procedures

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Titanium (Ti) is known as the most popular implant materials. In addition, the coating technology of hydroxyapatite (HA) or carbonate-containing apatite (CA) on Ti substrates having various shapes has been interested from the viewpoint for improvement of implant's osteoconductivity. The fabrication of apatite coatings on metallic substrates has been investigated by several techniques. We developed novel wet processes using some stable solutions in which Ca complexes and phosphate ion dissolve simultaneously. The CA film can be deposited homogeneously on substrates, Ti plate and Ti fiber mesh, using a stable precursor solution involving a Ca 2+ complex of ethylenediaminetetraacetic acid (EDTA). Another stable aqueous solution was prepared by the addition of phosphoric acid to a calcium hydrogen carbonate solution. The solution is adequate to be sprayed facilely onto a Ti plate by using an airbrush. It is important that the fabricated apatite films by the spray process have the characteristic network structures. The materials with these CA films are nontoxic and have the excellent bonding ability to bone tissues.

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Thermodynamic and Kinetic Interpretation of Enamel Mineralization: Octacalcium Phosphate (OCP) as an Inevitable Intermediate Phase.

2002

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Abstract:Much attention has been given to the growth mechanism of enamel mineral by which the unique features (i.e., morphology, size and alignment) of enamel crystallites in mammals are achieved. In this paper, we report our experimental and theoretical approaches to a long-debated and unsettled issue, i.e., the involvement and role of an acidic precursor in enamel mineralization.Analysis of nucleation events, which octacalcium phosphate (OCP) in precipitation reactions. We also developed a new crystal growth model using miniaturized columns in tandem, in which OCP itself was proved to be equally competent, in comparison with hydroxyapatite (HA), as a template for crystal precipitation and as an adsorbent for interaction with enamel proteins. Simulation of the precipitation process taking place in situ with calcium transport (its increment) into enamel fluid also allowed us to predict that OCP is more kinetically favorable than HA, if

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Carbonation of Enamal Apatite Crystals: Lattice Substitutions and Surface Adsorption.

Cited by 3 publications

References 11 publications

Application of carbonated apatite coating on a Ti substrate by aqueous spray method

Application of carbonated apatite coating on a Ti substrate by aqueous spray method

Fabrication of Apatite Films on Ti Substrates of Simple and Complicated Shapes by Using Stable Solutions of Ca Complex

Thermodynamic and Kinetic Interpretation of Enamel Mineralization: Octacalcium Phosphate (OCP) as an Inevitable Intermediate Phase.

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