Comparative Evaluation of Mechanically Modified Heat Polymerized Acrylic Resin for Shear Bond Strength: An in vitro Study
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Abstract
Aims and objective: Debonding of denture teeth from a denture base is a routine problem in dental practice. The present study was conducted to comparatively evaluate shear bond strength of crossslinked Denture Teeth to denture base Resin with mechanical modifications
Methodology :The test spamples central incisors {11} were divided into 4 groups. Group 1: control, whereas group 2, group 3 and group 4 were experimental groups modified with half moon shaped groove, Y shaped grooves and combination of half moon shaped and Y grooves respectively. The teeth were arranged with the angulation of 130 degree on wax blocks.
These test specimens were prepared by -LUCITONE 199 heat cure resin. A shear load was applied at palatal surface of central incisor (11) using Universal Testing Machine until failure occurred
Results : The lowest shear bond strength value was seen with the Group 1 specimens prepared by LUCITONE 199 and the highest shear bond strength value was seen with the Group 4 specimens prepared with combination of half moon shaped and Y grooves packed with LUCITONE 199
Conclusion Within the limitations of this study, it can be concluded the specimens with combination of half moon shaped and Y grooves packed with LUCITONE 199
showed highest shear bond strength value while the specimens without any mechanical preparation showed lowest shear bond strength value.
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