Studies on electrical and thermal properties of dental glass ionomer cement
Affiliation(s)
Department of Physics, Andhra University, Visakhapatnam, India. Department of Physics, GITAM Institute of Technology (GIT), GITAM University, Visakhapatnam, India.
Department of Physics, Andhra University, Visakhapatnam, India. Department of Physics, GITAM Institute of Technology (GIT), GITAM University, Visakhapatnam, India.
ABSTRACT
A commercially available dental Glass Ionomer Cement (GIC) was studied after setting at room temperature (300 K) to understand its DC electrical conductivity, dielectric and thermal properties. The dental GIC’s are supposed to have free mobile charge carriers like F- ions. Interestingly this material loses its conductivity above 80°C and behaves like a non-polar substance. The frequency dependent dielectric studies also indicate the loss of mobile charge carriers in the samples annealed at 80°C. The DSC and TGA studies indicate that the material loses H2O exothermically at 100°C. This is attributed to the onset of a secondary setting reaction.
A commercially available dental Glass Ionomer Cement (GIC) was studied after setting at room temperature (300 K) to understand its DC electrical conductivity, dielectric and thermal properties. The dental GIC’s are supposed to have free mobile charge carriers like F- ions. Interestingly this material loses its conductivity above 80°C and behaves like a non-polar substance. The frequency dependent dielectric studies also indicate the loss of mobile charge carriers in the samples annealed at 80°C. The DSC and TGA studies indicate that the material loses H2O exothermically at 100°C. This is attributed to the onset of a secondary setting reaction.
KEYWORDS
Dental Glass Ionomer Cement; Dielectric Properties; DSC Studies; DC Conductivity Measurements
Dental Glass Ionomer Cement; Dielectric Properties; DSC Studies; DC Conductivity Measurements
Cite this paper
Babu, T. , Ramesh, K. and Sastry, D. (2012) Studies on electrical and thermal properties of dental glass ionomer cement. Journal of Biomedical Science and Engineering, 5, 634-638. doi: 10.4236/jbise.2012.511078.
Babu, T. , Ramesh, K. and Sastry, D. (2012) Studies on electrical and thermal properties of dental glass ionomer cement. Journal of Biomedical Science and Engineering, 5, 634-638. doi: 10.4236/jbise.2012.511078.
References
[1] Wilson, A.D. and Nicholson, J.W. (1993) Acid-base cements: Their biomedical and industrial applications. Cambridge University Press, Cambridge. doi:10.1017/CBO9780511524813 [2] Milne, K.A., Calosi, N.J., O’Donnel, J.H., Kennard, C.H.L., Vega, S. and Marks, D. (1997) Glass ionomer dental restorative. Journal of Materials Science, 8, 349-356. doi:10.1023/A:1018576715479 [3] De Maeyer, E.A.P., et al. (1999) Stoichiometry of the leaching process of fluoride-containing aluminosilicate glass ionomer glasses. Journal of Dental Research, 78, 1312-1318. doi:10.1177/00220345990780070501 [4] Barry, T.I., Clinton, D.J. and Wilson, A.D. (1979) The structure of a glass ionomer cement and its relationship to the setting process. Journal of Dental Research, 58, 1072-1079. doi:10.1177/00220345790580030801 [5] De Maeyer, E.A.P., Verbeeck, R.M.H. and Vercruysse, C.W.J. (2002) Infrared spectrometric study of acid-degradable glasses. Journal of Dental Research, 81, 552-555. doi:10.1177/154405910208100810 [6] Young, A.M., Sherpa, A., Pearson, G., Schottlander, B. and Waters, D.N. (2000) Use of Raman spectroscopy in the characterisation of the acid-base reaction in glassionomer cements; Biomaterials, 21, 1971-1979. [7] Stamboulis, A., Matsuya, S., Hill, R.G., Law, R.V., Udoh, K., Nakagawa, M. and Matsuya, Y. (2006) MAS-NMR spectroscopy studies in the setting reaction of glass ionomer cements. Journal of Dentistry, 34, 574-581. doi:10.1016/j.jdent.2005.08.006 [8] Tay, W.M. and Braden, M. (1984) Materials science dielectric properties of glass-ionomer cements-further studies. Journal of Dental Research, 63, 74-75. doi:10.1177/00220345840630011901 [9] Tay, W.M. and Braden, M. (1987) Thermal diffusivity of glass ionomer cements. Journal of Dental Research, 66, 1040-1043. doi:10.1177/00220345870660051001 [10] Eden, O.R., Foster, G.M. and Hooper, R.M. (2003) Investigation of the mechanical performance of young glass ionomer cement using dynamic mechanical analysis. Journal of Materials Science: Materials in Medicine, 14, 373-378. [11] DeMaeyer, E.A.P., Verbeeck, R.M.H. and Vercruysse, C.W.J. (1999) Stoichiometry of the leaching process of fluoride-containing aluminosilicate glass ionomer glasses. Journal of Dental Research, 78, 1312-1318. doi:10.1177/00220345990780070501 [12] De Maeyer, E.A.P. and Verbeeck, R.M.H. (2001) X-ray diffraction study of acid-degradable glasses. Journal of Dental Research, 80, 1764-1767. doi:10.1177/00220345010800081601 [13] Khalil, S.K.H. and Atkins, E.D.T. (1998) Investigation of glass ionomer cements using differential scanning calorimetry. Journal of Materials Science: Materials in Medicine, 9, 529-533. doi:10.1023/A:1008892006086 [14] Berzins, D.W., Abey, S., Costache, M.C., Wilkie, C.A. and Roberts, H.W. (2010) Resin-modified glass ionomer setting reaction competition. Journal of Dental Research, 89, 82-86. doi:10.1177/0022034509355919 [15] Kartelia, E.M. (2011) Thermal characterization of magnesium containing ionomer glasses. Ph.D Thesis, University of Birmingham, Birmingham.
[1] Wilson, A.D. and Nicholson, J.W. (1993) Acid-base cements: Their biomedical and industrial applications. Cambridge University Press, Cambridge. doi:10.1017/CBO9780511524813 [2] Milne, K.A., Calosi, N.J., O’Donnel, J.H., Kennard, C.H.L., Vega, S. and Marks, D. (1997) Glass ionomer dental restorative. Journal of Materials Science, 8, 349-356. doi:10.1023/A:1018576715479 [3] De Maeyer, E.A.P., et al. (1999) Stoichiometry of the leaching process of fluoride-containing aluminosilicate glass ionomer glasses. Journal of Dental Research, 78, 1312-1318. doi:10.1177/00220345990780070501 [4] Barry, T.I., Clinton, D.J. and Wilson, A.D. (1979) The structure of a glass ionomer cement and its relationship to the setting process. Journal of Dental Research, 58, 1072-1079. doi:10.1177/00220345790580030801 [5] De Maeyer, E.A.P., Verbeeck, R.M.H. and Vercruysse, C.W.J. (2002) Infrared spectrometric study of acid-degradable glasses. Journal of Dental Research, 81, 552-555. doi:10.1177/154405910208100810 [6] Young, A.M., Sherpa, A., Pearson, G., Schottlander, B. and Waters, D.N. (2000) Use of Raman spectroscopy in the characterisation of the acid-base reaction in glassionomer cements; Biomaterials, 21, 1971-1979. [7] Stamboulis, A., Matsuya, S., Hill, R.G., Law, R.V., Udoh, K., Nakagawa, M. and Matsuya, Y. (2006) MAS-NMR spectroscopy studies in the setting reaction of glass ionomer cements. Journal of Dentistry, 34, 574-581. doi:10.1016/j.jdent.2005.08.006 [8] Tay, W.M. and Braden, M. (1984) Materials science dielectric properties of glass-ionomer cements-further studies. Journal of Dental Research, 63, 74-75. doi:10.1177/00220345840630011901 [9] Tay, W.M. and Braden, M. (1987) Thermal diffusivity of glass ionomer cements. Journal of Dental Research, 66, 1040-1043. doi:10.1177/00220345870660051001 [10] Eden, O.R., Foster, G.M. and Hooper, R.M. (2003) Investigation of the mechanical performance of young glass ionomer cement using dynamic mechanical analysis. Journal of Materials Science: Materials in Medicine, 14, 373-378. [11] DeMaeyer, E.A.P., Verbeeck, R.M.H. and Vercruysse, C.W.J. (1999) Stoichiometry of the leaching process of fluoride-containing aluminosilicate glass ionomer glasses. Journal of Dental Research, 78, 1312-1318. doi:10.1177/00220345990780070501 [12] De Maeyer, E.A.P. and Verbeeck, R.M.H. (2001) X-ray diffraction study of acid-degradable glasses. Journal of Dental Research, 80, 1764-1767. doi:10.1177/00220345010800081601 [13] Khalil, S.K.H. and Atkins, E.D.T. (1998) Investigation of glass ionomer cements using differential scanning calorimetry. Journal of Materials Science: Materials in Medicine, 9, 529-533. doi:10.1023/A:1008892006086 [14] Berzins, D.W., Abey, S., Costache, M.C., Wilkie, C.A. and Roberts, H.W. (2010) Resin-modified glass ionomer setting reaction competition. Journal of Dental Research, 89, 82-86. doi:10.1177/0022034509355919 [15] Kartelia, E.M. (2011) Thermal characterization of magnesium containing ionomer glasses. Ph.D Thesis, University of Birmingham, Birmingham.