A novel strategy for preparing nanoporous biphasic calcium phosphate of controlled composition via a modified nanoparticle-assembly method

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A novel strategy for preparing nanoporous biphasic calcium phosphate of controlled composition via a modified nanoparticle-assembly method

Persistent ID (NDL): info:ndljp/pid/12154575

Material type: 博士論文

Author: 藤原, 敬子

Publisher: -

Publication date: 2014-03-07

Material Format: Digital

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Name of awarding university/degree: 大阪歯科大学,博士（歯学）

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Note (General)：: Biphasic calcium phosphate (BCP) consisting of hydroxyapatite (HAp) and β-tricalcium phosphate is usually prepared by thermal decomposition of calcium...

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Material Type: 博士論文
Title: A novel strategy for preparing nanoporous biphasic calcium phosphate of controlled composition via a modified nanoparticle-assembly method
Author/Editor: 藤原, 敬子
Author Heading: 藤原, 敬子
Publication Date: 2014-03-07
Publication Date (W3CDTF): 2014-03-07
Alternative Title: 改良ナノ粒子集積法によるり組成を制御した二相性リン酸カルシウムナノ多孔質体の新規な制作方法
Degree grantor/type: 大阪歯科大学
Date Granted: 2014-03-07
Date Granted (W3CDTF): 2014-03-07
Dissertation Number: 甲第723号
Degree Type: 博士（歯学）
Conferring No. (Dissertation): 甲第723号
Text Language Code: eng
Subject Heading: Assembly
Calcium phosphate
Nanoparticle
Nanopore
Osteoblast
Target Audience: 一般
Note (General): Biphasic calcium phosphate (BCP) consisting of hydroxyapatite (HAp) and β-tricalcium phosphate is usually prepared by thermal decomposition of calcium-deficient HAp (CDHAp). However, the calcium deficiency and morphology of CDHAp are difficult to manipulate in parallel. In this study, we report a novel strategy for controlling the composition of nanoporous BCP by using only CDHAp nanoparticles with specific properties (Ca/P molar ratio, 1.61; particle size, 50 nm) as a building block and by adjusting the calcium deficiency of the nanoparticle-assembled CDHAp (Ca/P molar ratio, 1.50-1.67; pore size, 8 nm) with the addition of water-soluble Ca(NO3)2 or (NH 4)2HPO4. After thermal treatment at 1000 C, the composition of BCP could be predictably controlled by adjusting the Ca/P ratio of the nanoparticle-assembled CDHAp. Changes in the Ca/P ratio did not significantly affect the surface morphology of BCP, but the grain size (210-300 nm) and pore size (140-170 nm) tended to increase slightly as the Ca/P ratio decreased. The porosity significantly decreased upon the addition of Ca salts (porosity, 20%) or PO4 salts (porosity, 14%) compared with that of the sample without additives (porosity, 53%). In vitro tests demonstrated enhanced cell adhesion on nanoporous BCP compared with densely sintered pure HAp, and cell differentiation was promoted on the nanoporous pure HAp.
2013
Persistent ID (NDL): info:ndljp/pid/12154575
https://dl.ndl.go.jp/pid/12154575
Collection: 障害者向け資料
Collection (Materials For Handicapped People:1): テキストデータ
Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
https://dl.ndl.go.jp/collections/A00014
Acquisition Basis: 博士論文（自動収集）
Date Accepted (W3CDTF): 2022-03-06T04:54:00+09:00
Date Created (W3CDTF): 2016-06-28
Format (IMT): application/pdf
Access Restrictions: 国立国会図書館内限定公開
Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
Availability of remote photoduplication service: 可
Periodical Title (URI): http://id.nii.ac.jp/1392/00000040/
Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション
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