Dental Materials
Volume 24, Issue 12 , Pages 1616-1622, December 2008

Brittle and ductile adjustable cement derived from calcium phosphate cement/polyacrylic acid composites

  • Wen-Cheng Chen

      Affiliations

    • Faculty of Dentistry, Kaohsiung Medical University, 807 Kaohsiung, Taiwan, ROC
    • ,
  • Chien-Ping Ju

      Affiliations

    • Department of Materials Science and Engineering, National Cheng-Kung University, 70101 Tainan, Taiwan, ROC
    • ,
  • Jen-Chyan Wang

      Affiliations

    • Faculty of Dentistry, Kaohsiung Medical University, 807 Kaohsiung, Taiwan, ROC
    • ,
  • Chun-Cheng Hung

      Affiliations

    • Faculty of Dentistry, Kaohsiung Medical University, 807 Kaohsiung, Taiwan, ROC
    • ,
  • Jiin-Huey Chern Lin

      Affiliations

    • Department of Materials Science and Engineering, National Cheng-Kung University, 70101 Tainan, Taiwan, ROC
    • Corresponding Author InformationCorresponding author at: Department of Materials Science and Engineering, National Cheng-Kung University, No. 1 University Road, Tainan City 701, Taiwan, ROC. Tel.: +886 62748086; fax: +886 62748086.

Received 6 December 2007; accepted 3 March 2008.

Abstract 

Objectives

Bone filler has been used over the years in dental and biomedical applications. The present work is to characterize a non-dispersive, fast setting, modulus adjustable, high bioresorbable composite bone cement derived from calcium phosphate-based cement combined with polymer and binding agents. This cement, we hope, will not swell in simulated body fluid and keep the osteogenetic properties of the dry bone and avoid its disadvantages of being brittle.

Methods

We developed a calcium phosphate cement (CPC) of tetracalcium phosphate/dicalcium phosphate anhydrous (TTCP/DCPA)–polyacrylic acid with tartaric acid, calcium fluoride additives and phosphate hardening solution.

Results

The results show that while composite, the hard–brittle properties of 25wt% polyacrylic acid are proportional to CPC and mixing with additives is the same as those of the CPC without polyacrylic acid added. With an increase of polyacrylic acid/CPC ratio, the 67wt% samples revealed ductile–tough properties and 100wt% samples kept ductile or elastic properties after 24h of immersion. The modulus range of this development was from 200 to 2600MPa after getting immersed in simulated body fluid for 24h.

Significance

The TTCP/DCPA–polyacrylic acid based CPC demonstrates adjustable brittle/ductile strength during setting and after immersion, and the final reaction products consist of high bioresorbable monetite/brushite/calcium fluoride composite with polyacrylic acid.

Keywords: Calcium phosphate cement, Brittle, Ductile, Modulus, Polyacrylic acid, Brushite

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PII: S0109-5641(08)00091-2

doi:10.1016/j.dental.2008.03.032

Dental Materials
Volume 24, Issue 12 , Pages 1616-1622, December 2008

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