Effect of citric acid on setting reaction and tissue response to β-TCP granular cement

Naoyuki Fukuda, Kanji Tsuru, Yoshihide Mori, Kunio Ishikawa

研究成果: Contribution to journalArticle

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We recently reported that when an acidic calcium phosphate solution is mixed with β-tricalcium phosphate (β-TCP) granules, the resulting dicalcium phosphate dihydrate (DCPD) crystals form bridges between the β-TCP granules, creating a set interconnected porous structure in approximately 1 min. Although this self-setting β-TCP granular cement (β-TCPGC) is useful for clinical applications, the short setting time is a key drawback for handling. In this study, the setting time of β-TCPGC was adjusted with the addition of citric acid, which is a known inhibiter of DCPD crystal growth. As the concentration of citric acid in the acidic calcium phosphate solution increased, the amount of DCPD formation in the set β-TCPGC decreased, and the crystal morphology of DCPD became elongated. β-TCPGC prepared with various citric acid concentrations were used as grafting material in rat calvarial bone defects to evaluate bone regeneration in vivo. Four weeks after implantation, no inflammatory reaction and approximately 20% new bone formation were observed, regardless of the presence or absence of citric acid in the liquid phase of β-TCPGC. We concluded, therefore, that citric acid might be a useful retarder of β-TCPGC setting times.

元の言語英語
記事番号015027
ジャーナルBiomedical Materials (Bristol)
12
発行部数1
DOI
出版物ステータス出版済み - 2 2017

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

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