Fabrication of three different types of porous carbonate-substituted apatite ceramics for artificial bone

Toshimitsu Tanaka, Tomohiko Yoshioka, Toshiyuki Ikoma, Tomoya Kuwayama, Tatsuhiko Higaki, Junzo Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

The purposes of this study were to fabricate porous carbonate-substituted apatite (CAp) ceramics and characterize important properties such as compressive strengths and dissolution rates for an artificial bone. Porous A-type CAp (A-CAp) with uniaxial pores was fabricated by sintering porous hydroxyapatite green bodies at 1000°C in carbon dioxide gas atmosphere. B-type CAp (B-CAp) nanocrystals prepared by a wet method were mixed with an organic binder, freeze-dried and heated at 800°C in air, and AB-type CAp (AB-CAp) was fabricated by heating B-CAp porous bodies including the organic binder at 1100°C in carbon dioxide gas atmosphere. From the morphological observations with a scanning electron microscope, the porous A-CAp had uniaxially oriented pores of 104±33 μm in diameter, while the porous B-CAp and AB-CAp had large pores of 143±48 μm and 181±46 μm in diameter, of which pores were interconnected with small pores of 31±11 μm and 45±17 μm in diameter. The dissolution rates of CAps were apparently larger than that of HAp; the calcium concentrations increased in the order of AB-CAp > B-CAp > A-CAp > HAp. This is mainly attributed to carbonate content although it could be partialy depended on the different porous structures and diameters.

Original languageEnglish
Title of host publicationKey Engineering Materials
Pages143-146
Number of pages4
Volume529-530
Edition1
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event24th Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2012 - Fukuoka, Japan
Duration: Oct 21 2012Oct 24 2012

Publication series

NameKey Engineering Materials
Number1
Volume529-530
ISSN (Print)10139826

Other

Other24th Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2012
CountryJapan
CityFukuoka
Period10/21/1210/24/12

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Keywords

  • Carbonate-substituted apatite
  • Dissolution test
  • Porous structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Tanaka, T., Yoshioka, T., Ikoma, T., Kuwayama, T., Higaki, T., & Tanaka, J. (2013). Fabrication of three different types of porous carbonate-substituted apatite ceramics for artificial bone. In Key Engineering Materials (1 ed., Vol. 529-530, pp. 143-146). (Key Engineering Materials; Vol. 529-530, No. 1). https://doi.org/10.4028/www.scientific.net/KEM.529-530.143