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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:28 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Polymer Physics
Title:
Interface Side Effects on RBCS Dental Restorations
Authors:
E. Gatin (1), R.R. Ilici (2), B. Iordache, C. Berlic (1), L. Ciobanu (2)
Affiliation:
(1) University of Bucharest, Faculty of Physics, P.O.BOX.MG-11, Bucharest, Romania.
(2) University Carol Davila, Faculty of Dentistry, Str. Calea Plevnei 19, Bucharest, Romania
E-mail
edgatin@netscape.net
Keywords:
polymer resin, RBCs, tooth stresses, polymerisation shrinkage
Abstract:
In order to obtain good dental fillings for dental restorations, a large variety of polymer resins it is used. Even if it is difficult, an evaluation of technical, biological and clinical properties of these materials is requested.For dental fillings such as resin – based composite (RBCs), to overcome problems associated to polymerization shrinkage, investigators have advocated several techniques. None of these techniques can eliminate the stress completely. Naturally, the surest way to avoid shrinkage stress is to use non-shrinking resins. As the composite polymerizes and shrinks, the stresses that develop at the tooth-composite adhesive interface and within the tooth itself depend upon the cavity shape,size, C-factor, modulus of the tooth, the developing modulus of the composite, and the rate of polymerisation. These factors combine and interact simultaneously in complex ways, translating polymerisation shrinkage into tooth stresses. The evaluation of these side effects is quite important and SEM investigation of dentin – RBCs – enamel interface is the most adequate method for this purpose.
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