Stereomicroscopic Evaluation of the Adaptability Of Different Retro filling Materials (In Vitro Study(

Abstract

The purpose of this in vitro study was to evaluate the marginal interfaces between
tooth structure and the retro-filling materials.
Sixty teeth were divided into six groups of ten for each. The teeth were
instrumented to a minimum of size no. 45 k-file, obturated with gutta-percha, resected
perpendicular to their long axes and prepared to receive a retro-filling. The teeth were
filled with amalgam, resin-modified GIC or light-cured composite resin. Each filling
material was either applied with dentin adhesive or without dentin adhesive.
Photomicrographs were made & examined by four evaluators.
Statistical analysis of the results revealed that the composite resin had better
marginal adaptation than the amalgam & the glass ionomer cement, but the difference
was non significant (p>0.05). In addition, the non-adhesive groups together had less
marginal adaptation than the other groups and the difference was significant (p<0.05).
Composite resin retro-filling material had better marginal adaptation than other
materials used and the dentin adhesive may have effect on the quality of the
adaptation.