Comparative Evaluation Of Tear Strength And Compressive Resistance Of Three Commercially Available Bite Registration Materials: An In Vitro Study

Abstract

BACKGROUND:

An interocclusal record is a precise recording of a maxillomandibular position . Accurate mounting can lead to restorations that require minimal occlusal modifications intraorally, thus reducing the chairside time. The impression materials are altered by the addition of plasticizers and catalysts in order to transform them into interocclusal recording medium.

AIM: To evaluate the tear strength and compressive resistance of three commercially available bite registration materials.

MATERIALS AND METHODS: The present study was conducted to evaluate the tear strength and compressive resistance of three bite registration materials namely Polyether, Bis-acrylate and Thermoplastic resin. A total of 48 samples, including 16 samples for each bite registration material, were prepared. 8 samples were used in each of the three subgroups of samples for evaluation. The obtained data was subjected to statistical analysis using SPSS 22.0 software. The One way ANOVA test was used to compare study parameters among the groups. Tukey’s post-hoc test was used for multiple comparison between the groups.

RESULTS: Statistically, Bis-acrylates and Thermoplastic groups have similar tear strength but have better tear strength than the Polyether group. Bis-acrylates and Polyether Groups had similar compressive resistance but had better compressive resistance than the Thermoplastic Group.

CONCLUSION: Thermoplastic resin was examined to have the highest tear strength followed by  Bis-acrylate and Polyether. Polyether was found to have the highest compressive resistance followed by Bis-acrylate and Thermoplastic resin. Bis-acyrlate showed median values for tear strength and compressive resistance. Therefore choice of interocclusal registration material can be decided by the clinician based on case specificity and considering the advantages and drawbacks of each material.