Effect of Light-Curing Duration on the Surface Hardness of Nanohybrid Composite Resin
DOI:
https://doi.org/10.46862/interdental.v22i1.13832Keywords:
Curing time, nanohybrid composite resin, polymerization, surface hardness, Vickers Hardness TestAbstract
Introduction: Nanohybrid composite resin is widely used due to its favorable esthetic and mechanical properties. Surface hardness is an important property influencing resistance to masticatory forces and wear, and it depends on the effectiveness of polymerization. Inadequate light-curing can reduce cross-link formation, resulting in lower hardness. This study evaluated the effect of different light-curing durations on the surface hardness of nanohybrid composite resin.
Materials and Methods: This in vitro experimental study used a post-test-only design with 27 samples of Filtek Z250. Samples were divided into three groups based on light-curing durations of 20, 30, and 40 seconds. Surface hardness was measured using a Vickers Hardness Tester. Data were analyzed using One-Way ANOVA followed by Tukey HSD post hoc test.
Results and Discussion: The mean surface hardness values for 20, 30, and 40 seconds were 82.52 VHN, 84.69 VHN, and 92.85 VHN, respectively, showing increased hardness with longer curing time. A significant difference was found between the 20-second and 40-second groups (p < 0.05), while no significant differences were observed between 20 vs 30 seconds and 30 vs 40 seconds (p > 0.05). These findings indicate that longer light-curing improves polymerization and enhances surface hardness.
Conclusion: Light-curing duration significantly affects the surface hardness of nanohybrid composite resin, with longer curing times producing higher hardness values.
Downloads
References
1. Alsharif Saad, et al. Components of dental resin composites: a literature review. Alq J Med App Sci. 2024; 7(3): 427–440. Doi: 10.54361/ajmas.247301
2. Nordin NNM, Ismail NH, Mohamad D, Yhaya MF. Characterisation and properties of nanohybrid dental composite (NhDC) reinforced with zirconia and alumina. Braz J Oral Sci. 2024; 23: e242664. Doi: 10.20396/bjos.v23i00.8672664
3. Păstrav M, Păstrav O, Chisnoiu AM, Chisnoiu RM, Cuc S, Petean I, Saroși C, Feștilă D. Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study. Biomedicines. 2024;12(1): 243. Doi: 10.3390/biomedicines12010243
4. Gugnani M, Singla M, Grewal MS, Arora A, Setya G, Jain A. Comparison of four different light-curing units and evaluation of the depth of cure and microhardness of nanohybrid composite resin. World J Dent. 2022; 13(6): 612–616. Doi: 10.5005/jp-journals-10015-2114
5. Jabr NAB, Al-Saidi WN, Jabr, IAB Albounni R. Effect of polymerization time and shade on the depth of cure of nano-hybrid resin composites. Eur Dent Res Biomater J. 2021; 2(1): 29–32. Doi: 10.1055/s-0041-1726169
6. Bilge K, İpek İ. Effects of different LED light curing units on the degree of conversion and microhardness of different composites: FT-IR and SEM-EDX analysis. Polymer Bulletin 2024; 81: 13825-13838. Doi: 10.1007/s00289-024-05362-2
7. Kaptan A, Kaya S, Eren D. Influence of different LED curing-units on depth of cure and micro-hardness of nano-hybrid resin composite. Cumhuriyet Dent J. 2021; 24(1): 88–95. Doi: 10.7126/cumudj.855065
8. Wu Q. Free-radical polymerization modeling in photocurable systems. Polymers. 2021; 14(10): 2074.
9. Barakah HM. Effect of different curing times and distances on the microhardness of nanofilled resin-based composite restorations. Saudi Dent J. 2021; 33(8): 1035-1041. Doi: 10.1016/j.sdentj.2021.05.007
10. Duratbegović D, Pervan N, Jakupović S, Kobašlija S. The effects of intensity, exposure time, and distance of polymerization light on Vickers microhardness and temperature rise of conventional resin-based composite. Polymers. 2024; 16(22): 3175. Doi: 10.3390/polym16223175
11. Oglakci B, Özlen RHE, Demirkol M, Özduman ZC, Kucukyildirim BO, Dalkilic EE. The effect of curing modes and times of third-generation LED LCU on the mechanical properties of nanocomposites. Odovtos Int J Dent Sci. 2022; 24(3): 61–74. Doi: 10.15517/ijds.2022.49836
12. Watts DC. Light-curing dental resin-based composites: how it works and how you can make it work. Front Dent Med. 2023; 4: 1108316. Doi: 10.3389/fdmed.2023.1108316
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2026 I Gusti Ngurah Bagus Tista, Kadek Lusi Ernawati, I Gusti Ayu Raras Mayfanka
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
- Every manuscript submitted to must observe the policy and terms set by the Interdental Jurnal Kedokteran Gigi (IJKG)
- Publication rights to manuscript content published by the Interdental Jurnal Kedokteran Gigi (IJKG) is owned by the journal with the consent and approval of the author(s) concerned.
- Full texts of electronically published manuscripts can be accessed free of charge and used according to the license shown below.
