Subscribe to RSS
Comparative Evaluation of Flexural Strength and Modulus of Elasticity of Three Adhesive Luting Cements at Different Time Intervals under Oral Simulated Conditions: An In Vitro StudySource of Funding None.
Aim The purpose of this study was to compare and evaluate the flexural strength and modulus of elasticity of three adhesive luting cements as a function of specimen age, effect of storage media, and effect of curing through porcelain.
Materials and Methods Twenty samples fabricated for self-cure resin-modified glass ionomer cement (GIC; RelyX Luting 2, 3M ESPE, United States) were classified as group 1, whereas 40 samples fabricated for two dual-cure resin cements (20 samples each), Universal Resin Cement (Ammdent, Italy) and Maxcem Elite (Kerr Australia Pty. Ltd.), were classified as groups 2 and 3, respectively. The dual-cure cements were photo-activated using light cure unit with an intensity of 550 mW/cm2 in nine overlapping sections for 20 seconds per section on both sides. A total of 60 samples (20 samples in each group) were fabricated and tested using universal testing machine to compare flexural strength and modulus of elasticity of resin-modified GIC with two dual-cure adhesive resin cements, to determine the influence of storage of the specimens in artificial saliva at 37°C for 24 hours and to determine the influence of curing through porcelain disk of 2 mm thickness on these properties.
Results The overall mean flexural strength and modulus of elasticity of resin-modified GIC was less than the dual-cure resin cements. The values reduced for resin-modified GIC when the samples were tested after 24 hours of storage in saliva, whereas an increase in the strength was seen for dual-cure cements. The curing through porcelain disk reduced the properties of dual-cure cements. Maxcem Elite showed better overall mean flexural strength and modulus of elasticity in all the parameters.
Conclusion When comparing all three cements, both dual-cure cements showed better flexural strength and modulus of elasticity compared to resin-modified GIC, which indicates their use in cementation of fixed restorations.
07 July 2021 (online)
© 2021. Bhojia Dental College and Hospital affiliated to Himachal Pradesh University. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).
Thieme Medical and Scientific Publishers Pvt. Ltd.
A-12, 2nd Floor, Sector 2, Noida-201301 UP, India
- 1 Anusavice KJ, Shen C, Rawls HR. eds. Phillips’ s cience of Dental Materials. St. Louis, MO: Elsevier Health Sciences; 2012
- 2 Li ZC, White SN. Mechanical properties of dental luting cements. J Prosthet Dent 1999; 81 (05) 597-609
- 3 Diaz-Arnold AM, Vargas MA, Haselton DR. Current status of luting agents for fixed prosthodontics. J Prosthet Dent 1999; 81 (02) 135-141
- 4 El-Mowafy OM, Rubo MH. Influence of composite inlay/onlay thickness on hardening of dual-cured resin cements. J Can Dent Assoc 2000; 66 (03) 147
- 5 Attar N, Tam LE, McComb D. Mechanical and physical properties of contemporary dental luting agents. J Prosthet Dent 2003; 89 (02) 127-134
- 6 Bhamra GS, Fleming GJ. Effects of halogen light irradiation variables (tip diameter, irradiance, irradiation protocol) on flexural strength properties of resin-based composites. J Dent 2008; 36 (08) 643-650
- 7 Meng X, Yoshida K, Atsuta M. Influence of ceramic thickness on mechanical properties and polymer structure of dual-cured resin luting agents. Dent Mater 2008; 24 (05) 594-599
- 8 Blackman R, Barghi N, Duke E. Influence of ceramic thickness on the polymerization of light-cured resin cement. J Prosthet Dent 1990; 63 (03) 295-300
- 9 Wadambe TN, Maheswari BU, Devarhubli AR. Comparison of sorption, solubility, and flexural strength of four resin luting cements in three different media: an in vitro study. Journal of Advanced Clinical and Research Insights. 2017; 4 (01) 8-12
- 10 Yap AU. Resin-modified glass ionomer cements: a comparison of water sorption characteristics. Biomaterials 1996; 17 (19) 1897-1900
- 11 Pace LL, Hummel SK, Marker VA, Bolouri A. Comparison of the flexural strength of five adhesive resin cements. J Prosthodont 2007; 16 (01) 18-24
- 12 Lu H, Mehmood A, Chow A, Powers JM. Influence of polymerization mode on flexural properties of esthetic resin luting agents. J Prosthet Dent 2005; 94 (06) 549-554
- 13 std . ISO 4049. International Standard Dentistry. Resin-based dental filling materials. 1988:1–7/std