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VOLUME 6 , ISSUE 2 ( July-December, 2021 ) > List of Articles

Original Article

The Effect of Endodontic Treatment and Thermocycling on Cuspal Deflection of Teeth Restored with Different Direct Resin Composites

Cansu Atalay, Ayse Ruya Yazici, Aynur Sidika Horuztepe, Emre Nagas

Keywords : Bulk-fill composite, Cuspal deflection, Endodontically treated teeth, Fiber-reinforced composite

Citation Information : Atalay C, Yazici AR, Horuztepe AS, Nagas E. The Effect of Endodontic Treatment and Thermocycling on Cuspal Deflection of Teeth Restored with Different Direct Resin Composites. Cons Dent Endod J 2021; 6 (2):38-44.

DOI: 10.5005/jp-journals-10048-0105

License: CC BY-NC 4.0

Published Online: 30-06-2022

Copyright Statement:  Copyright © 2021; The Author(s).


Abstract

Objective: The purpose of this in vitro study was to assess the cuspal deflection of endodontically treated human premolars restored with different types of resin composites. Materials and methods: Forty-eight intact human upper premolars were selected, and standardized mesio-occluso-distal cavities were prepared and randomly divided into four experimental groups according to different direct restorative materials as follows (n = 12): Group I: Filtek Bulk Fill; Group II: SureFil SDR Flow + Ceram X Mono; Group III: GCeverX posterior + G-aenial posterior; and Group IV: Tetric N-Ceram. After storage in distilled water for 24 h at 37°C, specimens were subjected to thermocycling (5–55°C, ×1000). The cuspal deflection measurements were performed in microns at “after preparation”, “after endodontic treatment”, “24 h after restoration”, and “after thermocycling”. Data were statistically analyzed using Friedman and Kruskal Wallis tests (α = 0.05). Results: There were no statistically significant differences between groups in terms of cuspal deflection either after 24 hours or after thermocycling measurements (p >0.05). When comparing 24 hour and thermocycling cuspal deflection values within each restorative material group, none of the materials showed a significant difference (p >0.05). While no significant difference was detected between “after endodontic treatment” and “24 h after restoration” for each group (p >0.05), the difference between “after endodontic treatment” and “after thermocycling” cuspal deflection values increased statistically significantly for group II and group III (p <0.05). Conclusion: Endodontic treatment did not affect the cuspal movement of the upper premolars. Twenty-four hours after the restoration procedure and thermocycling procedure made no significant difference in the tested conventional/bulk-fill/bulk-fill flowable/fiber-reinforced resin composites’ cuspal deflection.


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