A microleakage model based on the diffusion phenomenon of a radio tracer from the cavity floor of a restoration to the outside medium was discussed and was solved numerically by the finite element method. The simulation results and laboratory data showed that quantitation of microleakage could be achieved and expressed by a new term named Microleakage Coefficient, which reflected the changes of micro gaps by time.
Get full access to this article
View all access options for this article.
References
1.
Harper, W.E. : The Character of the Adaptation of Amalgam to the Walls of Cavities Attained by Present Methods of Instrumentation and the Use of the Best Known Alloys as Indicated by the Air Pressure Test, Dent Rev26:1179-1198, 1912 .
2.
Hirsch, L. and Weinreb, M.M.: Marginal Fit of Direct Acrylic Restorations, JADA56:13-21, 1958.
3.
Philips, R.W. ; Gilmore, H.W.; Swartz , J.L.; and Schenker , S.I.: Adaptation of Restorations in vivo as Assessed by 45Ca, JADA62:9-20, 1961.
4.
Seltzer, S.X. : Penetration of Microorganisms Between the Tooth and Direct Resin Fillings, JADA51:560-566, 1955.
5.
Going, R.E.; Myers, H.M. and Prussin, S.G.: Quantitative Method for Studying Microleakage in vivo and in vitro , J Dent Res47:1128-1132, 1968 .
6.
Meyer, J.M.; Dennison, J.B.; and Craig, R.G.: Improved Method of Neutron Activation Analysis for Microleakage Studies , J Dent Res53:356-363, 1974.
7.
Douglas, W.H. and Zakariasen, K.L.: Volumetric Assessment of Apical Leakage Utilizing a Spectrophotometric Dye-Recovery Method, IADR Progr & Abst 60:No. 512, 1981.
8.
Jacobsen, P.H. and Von Fraunhoffer , J.A.: Assessment of Microleakage Using a Conductimetric Technique, J Dent Res54:41-48, 1975.
9.
Vasudev, U.B. : A Simple Method of Quantitating Microleakage in Dental Restorations: Dental Amalgams. Master's Thesis, University of Florida, Gainesville, FL, 1981, pp. 33-35.
10.
Tanner, J.E. ; Liu, K.-J.; and Anderson , J.E.: Proton Magnetic Resonance Self-Diffusion Studies of Poly(ethylene Oxide) and Poly(dimethylsiloxane) Solutions, Macromolecules4:586-588, 1971.
