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Evaluation of the acceptance of glass in bone

  • Ö. H. Andersson
  • Guizhi Liu
  • K. Kangasniemi
  • J. Juhanoja
Papers

Abstract

Six glasses in the SiO2-Na2O-CaO-P2O5-Al2O3-B2O3-system were implanted in rabbit tibia. The bone-implant interfaces were studied by scanning electron microscopy (SEM) and in a push-out test. In SEM it seems possible to distinguish between physical contact and chemical bonding between glass and bone. The measured push-out strength is about 0.5 MPa if no bone contact exists. If physical contact exists the push-out strength is 2–3 MPa. The push-out strength of titanium falls within these limits. Glasses, which on basis of the SEM study are concluded to chemically bond to bone, show push-out strengths of 16–23 MPa. Two non-bonding glasses are compared. One possesses only a silica-rich surface, whereas the other possesses a calcium phosphate-rich surface. Both develop a close contact with bone, but neither bonds chemically. There is no significant difference in their push-out strengths, which are comparable to that of titanium. Even if a calcium phosphate-rich layer forms at the glass surface, bonding may be reduced if Al2O3 is included in the glass composition. Further, a phosphate-free bioactive glass is compared with two phosphate-containing bioactive glasses. The phosphate-free glass bonds by incorporating phosphate from the body fluid into its surface. Push-out data indicate that this glass is not as firmly attached to bone as the phosphate-containing ones. The calcium phosphate layer formed is non-uniform, which might explain the lower bonding strength.

Keywords

Al2O3 Calcium Phosphate Physical Contact Bioactive Glass Glass Composition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    L. L. HENCH, R. J. SPLINTER, W. C. ALLEN and T. K. GREENLEE,J. Biomed. Mater. Res. Symp. 5(2) (1971) 117.Google Scholar
  2. 2.
    L. L. HENCH,Adv. Ceram. Mater. 1 (1986) 306.Google Scholar
  3. 3.
    U. GROSS and V. STRUNZ,J. Biomed. Mater. Res. 19 (1985) 251.Google Scholar
  4. 4.
    S. D. COOK, J. F. KAY, K. A. THOMAS and M. JARCHO,Int. J. Oral Maxillofacial Implants 2 (1987) 15.Google Scholar
  5. 5.
    T. FUJIU and M. OGINO,J. Biomed. Mater. Res. 18 (1984) 845.Google Scholar
  6. 6.
    T. NAKAMURA, T. YAMAMURO, S. HIGASHI, T. KOKUBO and S. ITO, ibid.19 (1985) 685.Google Scholar
  7. 7.
    Ö. H. ANDERSSON, G. LIU, K. H. KARLSSON, L. NIEMI, J. MIETTINEN and J. JUHANOJA,J. Mater. Sci. Mater. Medicine 1 (1990) 219.Google Scholar
  8. 8.
    Ö. ANDERSSON, dissertation, Åbo Akademi University (1990).Google Scholar
  9. 9.
    Ö. H. ANDERSSON, K. H. KARLSSON and K. KANGASNIEMI,J. Non-Cryst. Solids 119 (1990) 290.Google Scholar
  10. 10.
    L. L. HENCH,Annals of the New York Acad. Sci. 523 (1988) 54.Google Scholar
  11. 11.
    Idem,, in “Handbook of Bioactive Ceramics”, Vol. I, edited by T. Yamamuro, L. L. Hench and J. Wilson (CRC Press, Boca Raton, Florida, 1990) p. 7.Google Scholar
  12. 12.
    T. KOKUBO, S. ITO, S. SAKKA and T. YAMAMURO,J. Mater. Sci. 21 (1986) 536.Google Scholar

Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • Ö. H. Andersson
    • 1
  • Guizhi Liu
    • 1
  • K. Kangasniemi
    • 2
  • J. Juhanoja
    • 2
    • 3
  1. 1.Department of Chemical EngineeringAbo Akademi UniversityÅbo/TurkuFinland
  2. 2.Institute of DentistryUniversity of TurkuÅbo/TurkuFinland
  3. 3.Laboratory of Materials ScienceUniversity of TurkuÅbo/TurkuFinland

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