Fabrication of pure octacalcium phosphate blocks from dicalcium hydrogen phosphate dihydrate blocks via a dissolution–precipitation reaction in a basic solution

Yuki Sugiura, Kunio Ishikawa

Research output: Contribution to journalArticle

Abstract

Octacalcium phosphate (OCP) blocks are attractive as bone substitutes because of their excellent biocompatibility. They can be fabricated from precursor ceramic blocks via a compositional conversion process. Herein, high-purity OCP blocks were fabricated through a dissolution–precipitation reaction from precursor blocks of dicalcium hydrogen phosphate dihydrate (DCPD) immersed in a 1.00-mol/L basic phosphate solution of disodium hydrogen phosphate (NaAP; pH ∼ 9) at 70 °C for 2 days. The results showed that they were completely converted to OCP blocks comprising interlocking ribbon-like crystals while maintaining their shape. The diametral tensile strength of the obtained OCP blocks was ∼6 MPa, which was significantly higher than that of OCP blocks fabricated from calcium sulfate as the precursor.

Original languageEnglish
Pages (from-to)143-146
Number of pages4
JournalMaterials Letters
Volume239
DOIs
Publication statusPublished - Mar 15 2019

Fingerprint

Hydrogen
phosphates
Phosphates
Fabrication
fabrication
hydrogen
Bone Substitutes
Calcium Sulfate
Biocompatibility
Tensile strength
octacalcium phosphate
biocompatibility
Crystals
tensile strength
bones
ribbons
locking
calcium
Calcium
sulfates

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "Octacalcium phosphate (OCP) blocks are attractive as bone substitutes because of their excellent biocompatibility. They can be fabricated from precursor ceramic blocks via a compositional conversion process. Herein, high-purity OCP blocks were fabricated through a dissolution–precipitation reaction from precursor blocks of dicalcium hydrogen phosphate dihydrate (DCPD) immersed in a 1.00-mol/L basic phosphate solution of disodium hydrogen phosphate (NaAP; pH ∼ 9) at 70 °C for 2 days. The results showed that they were completely converted to OCP blocks comprising interlocking ribbon-like crystals while maintaining their shape. The diametral tensile strength of the obtained OCP blocks was ∼6 MPa, which was significantly higher than that of OCP blocks fabricated from calcium sulfate as the precursor.",
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AB - Octacalcium phosphate (OCP) blocks are attractive as bone substitutes because of their excellent biocompatibility. They can be fabricated from precursor ceramic blocks via a compositional conversion process. Herein, high-purity OCP blocks were fabricated through a dissolution–precipitation reaction from precursor blocks of dicalcium hydrogen phosphate dihydrate (DCPD) immersed in a 1.00-mol/L basic phosphate solution of disodium hydrogen phosphate (NaAP; pH ∼ 9) at 70 °C for 2 days. The results showed that they were completely converted to OCP blocks comprising interlocking ribbon-like crystals while maintaining their shape. The diametral tensile strength of the obtained OCP blocks was ∼6 MPa, which was significantly higher than that of OCP blocks fabricated from calcium sulfate as the precursor.

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