Comparison of the Accuracy of Bite Record between Modelling Wax and Silicone Bite Registration Material used with Posterior Bridges – Clinical Study

Abstract

Aim of the study: this study aims to evaluate the accuracy of bite record between modelling wax and bite registration material in mounting of dental casts on the articulator.

Materials and Methods: This study is a comparative clinical study. 15 patients with one or more posterior tooth loss who needed fixed prosthetic bridges with free end, two bites were taken for each patient using modelling wax and bite registration material, 30 bites in total. The occlusal preparation distance was measured inside the patient’s mouth on each mesial and distal abutments using pattern resin and modified tip digital caliper, then it was compared with its equivalent on dental casts after mounting them on the articulator according to each bite separately.

Results: The study shows that there were larger preparation distance between the patient’s mouth and the mounted dental casts using modelling wax, and no statistical differences when using bite registration material, without differences between the mesial and distal abutments.

Conclusion: Within this study limits, modelling wax causes an increase in the occlusal preparation distance within (0.27-0.39) mm on mesial and distal abutments in the terminal abutment bridges, while bite registration material doesn’t cause any increase in both mesial and distal abutments.