Journal of Materials Science: Materials in Medicine

, Volume 18, Issue 9, pp 1883–1888 | Cite as

Poly(acrylic acid) modified calcium phosphate cements: the effect of the composition of the cement powder and of the molecular weight and concentration of the polymeric acid

Article

Abstract

Polymer modified calcium phosphate cements made with cement powders of varying tetracalcium phosphate [TTCP] content were prepared using two different molecular weight fractions of poly(acrylic acid) at four different concentrations. The ratio of the precursors (TTCP:DCPA) in the cement powder was found to influence the initial setting which decreased with increasing concentration of TTCP in the powder phase. It was also observed that cements derived from the higher molecular weight containing PAA yielded significantly (P < 0.05) shorter initial setting time (Ti) than cements containing the lower molecular weight, poly(acrylic acid) [GE7 PAA] The effect of the varying the TTCP content in the three different cement types PCPC-A, PCPC-B and PCPC-C showed that the trends of the compressive strength were specific to the concentration and molecular weight of the poly (acrylic acid). A 20% concentration of Glascol-E7 with a cement powder composed of an equimolar ratio of precursors (PCPC-B) resulted in optimal compressive strength within the range investigated. The TTCP content of the cement powder could also be varied to improve the diametral tensile strengths of the cements; the specific effects however, were again governed by both the concentration and molecular weight of the constituent poly (acrylic acid). The influence of TTCP on both the initial setting time and diametral tensile strength was related to the Ca 2+ ion concentration, which determined the rate and amount of cross-linking in the cement.

Notes

Acknowledgement

The authors would like to thank EPSRC (Engineering & Physical Research Council, UK) for a research studentship to Dr Majekodunmi.

References

  1. 1.
    W. C. Brown, L. C. Chow, In edited by P. W. Brown, Cements Research Progress (Westerville: American Ceramics Society, 1986), pp. 352–379Google Scholar
  2. 2.
    A. CHERNG, S. TAKAGI and L. C. CHOW, J. Biomed. Mater. Res. 35 (1997) 273CrossRefGoogle Scholar
  3. 3.
    Y. MIYAMOTO, K. ISHIKAWA and M. TAKECHI et al., Biomaterials 17(14) (1996) 1429CrossRefGoogle Scholar
  4. 4.
    M. TAKECHI, Y. MIYAMOTO and K. ISHIKAWA, et al., J. Biomed. Mater. Res. 39(2) (1998) 308CrossRefGoogle Scholar
  5. 5.
    Y. MIYAMOTO, K. ISHIKAWA and M. TAKECHI, et al., J. Biomed. Mater. Res. 48(1) (1999) 36CrossRefGoogle Scholar
  6. 6.
    Y. MATSUYA, J. M. ANTONUCCI, S. MATSUYA, S. TAKAGI and L. C. CHOW, Dent. Mater. 12(1) (1996) 2CrossRefGoogle Scholar
  7. 7.
    Y. MATSUYA, S. MATSUYA, J. M. ANTONUCCI, S. TAKAGI, L. C. CHOW and A. AKAMINE, Biomaterials 20(7) (1999) 691CrossRefGoogle Scholar
  8. 8.
    M. TAKECHI, Y. MIYAMOTO and K. ISHIKAWA, et al., Biomaterials 19(22) (1998) 2057CrossRefGoogle Scholar
  9. 9.
    K. MIYAZAKI, T. HORIBE, J. M. ANTONUCCI, S. TAKAGI and L. C. CHOW, Dent. Mater. 9(1) (1993) 46CrossRefGoogle Scholar
  10. 10.
    M. P. GINEBRA, A. RILLIARD, E. FERNANDEZ, C. ELVIRA, J. SAN ROMAN and J. A. PLANELL, J. Biomed. Mater. Res. 57(1) (2001) 113CrossRefGoogle Scholar
  11. 11.
    L. LEROUX, Z. HATIM, M. FRECHE and J. L. LACOUT, Bone 25 (Supplement 1) (1999) 31SCrossRefGoogle Scholar
  12. 12.
    X. WANG, J. MA, Y. WANG and B. HE, Biomaterials 22(16) (2001) 2247CrossRefGoogle Scholar
  13. 13.
    A. O. MAJEKODUNMI, J. W. NICHOLSON and S. DEB, J. Mater. Sci.: Mater. Med. 14(9) (2003) 747CrossRefGoogle Scholar
  14. 14.
    ANSIAD Specification No. 61 for zinc polycarboxylate cement. J. Am. Dent. Assoc. 101 (1980) 669Google Scholar
  15. 15.
    R. W. HILL A. D. WILSON and C. P. WARRENS, J. Mater. Sci. 24 (1989) 363CrossRefGoogle Scholar
  16. 16.
    A. D. WILSON, R. G. HILL, C. P. WARRENS and B. G. LEWIS, J. Dent. Res. 68(2) (1989) 89Google Scholar
  17. 17.
    K. MIYAZAKI, T. HORIBE, J. M. ANTONUCCI, S. TAKAGI and L. C. CHOW, Dent. Mater. 9(1) (1993) 41CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Dental BiomaterialsGKT Dental InstituteLondonUK

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