Waveguide attachment influences on acoustic emission evaluation for marginal disintegration of dental composite restorations

Abstract

Influence of the waveguide attenuation was investigated on acoustic emission (AE) estimation for the marginal disintegration states of dental composite restorations. For the AE measurement, a human molar tooth substrate with an artificial class 1 cavity was made. A bonding agent was applied and a composite resin was tightly packed in the hole of the substrate. Under the light exposure to the composite resin the polymerization shrinkage occurred and the marginal failure generated AE waves. It was ascertained that the waveguide attachment brought about a great decrease in AE hits and amplitudes. Compensation for the attenuation loss of the AE parameters could offer some equivalency to the AE measurements by the direct attachment of the sensor on the substrate.