Abstract
Background: The aim of this study was to evaluate the Vickers surface micro-hardness and the depth of cure of two bulk-fill resin composites and one incremental-fill resin composite. Material and Methods: Two Bulk-fill dental resin composites (X-tra Fil, Voco; Sonic-FillTM 2, Kerr Corporation) and an incremental-fill dental resin composite (Filtek™ Z250 XT, 3M ESPE) were used. Sixty cylindrical specimens of 4 mm thickness were prepared using split Teflon molds. Specimens were divided into six groups (n=10) according to the type of the material used and according to the insertion technique applied (bulk or incremental). Prepared specimens were stored dry in complete darkness at 37°C for 24 hours. All specimens were tested for their Vickers surface micro-hardness, on their top and bottom surfaces. The depth of cure of the tested specimens was assessed by calculating the hardness ratio for each specimen. The Vickers surface micro-hardness and depth of cure data were analyzed for normality using Kolmogorov-Smirnov and Shapiro-Wilk tests. Independent sample-t test was used to compare between two groups while One-way ANOVA was used to compare between more than two groups. Results: Significant difference in the Vickers surface micro-hardness and depth of cure values was demonstrated among the tested materials (P < 0.0001). X-tra Fil recorded the highest mean Vickers micro-hardness value (94.05±1.05). Bulk-fill dental resin composites X-tra Fil and Sonic-Fill showed 0.980±0.005 and 0.921±0.020 depth of cure values (bottom/top hardness ratio) respectively while Z250 XT recorded 0.776±0.141. Conclusions: X-tra Fil showed highest Vickers surface micro-hardness values on both top and bottom surfaces, whether inserted in increments or bulk. Both bulk-fill resin composites showed higher depth of cure for both insertion techniques.
Recommended Citation
L. M. Moharam et al., "The Effect of Different Insertion Techniques on the Depth of Cure and Vickers Surface Micro-Hardness of Two Bulk-Fill Resin Composite Materials," Journal of Clinical and Experimental Dentistry, vol. 9, no. 2, pp. e266 - e271, Spanish Society of Oral Surgery, Jan 2017.
The definitive version is available at https://doi.org/10.4317/jced.53356
Department(s)
Chemical and Biochemical Engineering
Keywords and Phrases
Bulk-fill resin composite; Depth of cure; Insertion techniques; Vickers surface micro-hardness
International Standard Serial Number (ISSN)
1989-5488
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 National Center for Biotechnology Information, All rights reserved.
Publication Date
01 Jan 2017
