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Inducing bioactivity in dental porcelain through bioglass®

Changes in thermal behaviour

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Abstract

Dental materials restore morphology and function of lost or destroyed teeth, but cannot completely rebuild the structural relationship with soft periodontal tissues. The induction of bioactivity on classic dental porcelain can be achieved through the addition of bioactive glass. The aim of this study was to investigate the effect of Bioglass® on the thermal properties of dental porcelain in order to correlate the proportions of mixtures with the changes in thermal properties. Differential thermal analysis was performed in order to determine the characteristic temperatures of the mixtures. The increase of bioactive glass concentration in mixtures induces a shift to lower temperatures of the melting point temperature. This observation is attributed to the substitution of silicon ions by aluminium ions and to the formation of Al–O bond, which is weaker than Si–O bond. Mixtures heated at 950°C were examined also by the transmission electron microscopy (TEM) in order to be studied the microstructure of these samples at this critical temperature. The observed microstructural changes, confirm the process of substitution of Si 4+ ions by Al 3+ ions.

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Authors and Affiliations

  1. Solid State Physics Section, Physics Department, Aristotle University of Thessaloniki, Thessaloniki, Greece, 54124

    X. Chatzistavrou, K. Chrissafis, E. Polychroniadis & K. M. Paraskevopoulos

  2. School of Dentistry, Department of Fixed Prosthesis and Implant Prosthodontics, Aristotle University of Thessaloniki, Thessaloniki, Greece, 54124

    E. Kontonasaki & P. Koidis

Authors
  1. X. Chatzistavrou
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  2. K. Chrissafis
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  3. E. Polychroniadis
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  4. E. Kontonasaki
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  5. P. Koidis
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  6. K. M. Paraskevopoulos
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Corresponding author

Correspondence to K. M. Paraskevopoulos.

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Chatzistavrou, X., Chrissafis, K., Polychroniadis, E. et al. Inducing bioactivity in dental porcelain through bioglass® . J Therm Anal Calorim 86, 255–259 (2006). https://doi.org/10.1007/s10973-005-7166-x

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  • DOI: https://doi.org/10.1007/s10973-005-7166-x

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