Neutron activation analysis with dysprosium as a tracer was employed to determine quantitatively the microleakage around the restorations of an experimental hydrophobic composite, as well as a commercial composite. Only a negligible uptake of tracer was obtained for the experimental composite, whereas a five-fold uptake was recorded for the commercial composite. Capillary penetration of fluid around a restoration could be greatly reduced by using a hydrophobic composite.
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References
1.
O'Brien, W.J. ; Craig, R.G.; and Peyton, F.A.: Capillary Penetration Between Dissimilar Solids, J Colloid and Interface Sci26: 500,1968.
2.
Going, R.E.: Microleakage Around Dental Restorations: A Summarizing Review, JADA84:1349,1972.
3.
Going, R.E.; Myers, H.M.; and Prussin, S.G.: Quantitative Method for Studying Microleakage in vivo and in vitro , J Dent Res47: 1128,1968.
4.
Meyer, J.M.; Dennison, J.B.; and Craig, R.G.: Improved Method of Neutron Activation Analysis for Microleakage Studies , J Dent Res53:356,1974.
5.
Douglas, W.H. ; Craig, R.G.; and Chen, C.J.: A New Composite Restorative Based on a Hydrophobic Matrix, J Dent Res58 :1981-1986, 1979.
6.
Steel, R.G.D. and Torrie, J.H.: Principles and Procedures of Statistics , New York: McGraw-Hill , 1960, p. 106.
7.
Uy, K.C. and Chang, R.: An Approach to the Study of Mechanism of Adhesion to Teeth, in: Adhesive Restorative Dental Materials II. Bethesda: National Institute of Dental Research, 1965, pp. 103-128.
