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VOLUME 13 , ISSUE 2 ( April-June, 2023 ) > List of Articles

ORIGINAL RESEARCH

Evaluation of the Peel Bond Strength of a Room Temperature Vulcanizing Maxillofacial Silicone When Bonded to Three Different High-impact Heat-cured Acrylic Resins: An In Vitro Comparative Study

Aishwarya Shastry, Prema Balehonnur, Vishwananth S Krishnappa, Anoop Nair, Kalavathi Muniyappa, Meghana M Yadav

Keywords : Heat-cure acrylic resin, High-impact acrylic resin, Lucitone-199, Maxillofacial silicone, Peel bond strength, Primer A330G

Citation Information : Shastry A, Balehonnur P, Krishnappa VS, Nair A, Muniyappa K, Yadav MM. Evaluation of the Peel Bond Strength of a Room Temperature Vulcanizing Maxillofacial Silicone When Bonded to Three Different High-impact Heat-cured Acrylic Resins: An In Vitro Comparative Study. Int J Prosthodont Restor Dent 2023; 13 (2):76-80.

DOI: 10.5005/jp-journals-10019-1407

License: CC BY-NC 4.0

Published Online: 28-06-2023

Copyright Statement:  Copyright © 2023; The Author(s).


Abstract

Purpose: The purpose of the study was to evaluate and compare the peel bond strength of a room temperature vulcanizing (RTV) maxillofacial silicone bonded to three different high-impact heat-cure acrylic resins. Materials and methods: A total of 80 standardized rectangular specimens of dimensions 75 × 10 × 6 mm were fabricated. The specimens were categorized into four groups (n = 20 each) as group I—conventional heat-cure acrylic resin (Trevalon) and three brands of high-impact heat-cure acrylic resins (group II: Lucitone 199, group III: Acralyn H, and group IV: Acryl Hi). Each standardized specimen consisted of a rectangular acrylic component to which silicone was bonded using a primer. Peel bond strength between the acrylic and silicone was measured using a universal testing machine. Kruskal–Wallis H test was performed to compare the peel bond strength among all groups, followed by Dunn post hoc test to find the significant difference for pairwise comparison. Results: Standardized test specimens belonging to group II (Lucitone 199), bonded to RTV maxillofacial silicone, showed significantly (p = 0.013) greater peel bond strength (0.0372 ± 0.013 MPa) among all the groups. The test specimens of group III (Acralyn H, 0.0213 ± 0.007 MPa), group I (Trevalon, 0.0185 ± 0.009 MPa), and group IV (Acryl Hi, 0.0148 ± 0.007 MPa) showed peel bond strength to RTV silicones in decreasing order. Conclusion: The high-impact heat-cure acrylic resin (Lucitone 199) had significantly higher bond strength to maxillofacial silicones with the use of a primer than other acrylic resins used in the study. The other two brands of high-impact heat-cure acrylic resins showed comparable peel bond strength to that of conventional heat-cure acrylic resins. Therefore, high-impact heat-cure acrylic resins can be used as alternatives to conventional heat-cure acrylic resins in conjunction with RTV silicones in the fabrication of maxillofacial prostheses.

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