Development of self-setting calcium hydroxide preparation using dicalcium phosphate anhydrous and sodium hydrogen phosphate aqueous solution

Mariko Nakamura, Kunio Ishikawa, Yasuhiro Yoshida, Kazuomi Suzuki, Toshio Yamamoto

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Abstract

Although a calcium hydroxide preparation is widely used in dental clinics as a base liner and a root canal filling material, its very high basicity causes necrosis of the dental pulp and it does not set. In this study, we evaluated the feasibility of developing a calcium hydroxide preparation that has a good setting ability and a moderate basicity. The calcium hydroxide preparation examined showed a good setting ability and formed an apatitic mineral upon setting when dicalcium phosphate anhydrous (DCPA) powder was added and mixed with sodium hydrogen phosphate aqueous solution. Setting mechanism had a close relationship with apatite formation. As a result of the addition of DCPA, that is, acidic calcium phosphate, the calcium hydroxide preparation showed a relatively mild basicity when compared with the DCPA-free calcium hydroxide preparation. An animal study demonstrated that a calcium hydroxide preparation containing DCPA causes less inflammatory response at the initial stage and elicits faster secondary dentin formation than DCPA-free calcium hydroxide preparation. We concluded therefore that a calcium hydroxide preparation containing DCPA is a promising alternative to the calcium hydroxide preparation currently used in dental clinics.

Original languageEnglish
Pages (from-to)434-439
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume112
Issue number1308
Publication statusPublished - Aug 2004

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Keywords

  • Apatite
  • Calcium hydroxide
  • Calcium hydroxide preparation
  • Dicalcium phosphate anhydrous
  • Sodium hydrogen phosphate

ASJC Scopus subject areas

  • Ceramics and Composites

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