Ahmed, H., Yousif, A., Ibrahim, A., Jameel, D. (2025). The Color Stability of Different Composite Shades Using Variable Light-Curing Times. , 25(1), 182-191. doi: 10.33899/rdenj.2025.156690.1295
Hozan Tofiq Ahmed; Anas Hussein Yousif; Abdulkareem Ramadhan Ibrahim; Doaa Waleed Jameel. "The Color Stability of Different Composite Shades Using Variable Light-Curing Times". , 25, 1, 2025, 182-191. doi: 10.33899/rdenj.2025.156690.1295
Ahmed, H., Yousif, A., Ibrahim, A., Jameel, D. (2025). 'The Color Stability of Different Composite Shades Using Variable Light-Curing Times', , 25(1), pp. 182-191. doi: 10.33899/rdenj.2025.156690.1295
Ahmed, H., Yousif, A., Ibrahim, A., Jameel, D. The Color Stability of Different Composite Shades Using Variable Light-Curing Times. , 2025; 25(1): 182-191. doi: 10.33899/rdenj.2025.156690.1295

The Color Stability of Different Composite Shades Using Variable Light-Curing Times

Al-Rafidain Dental Journal
Article 14, Volume 25, Issue 1, March 2025, Pages 182-191    PDF (578.38 K)
Document Type: Research Paper
DOI: 10.33899/rdenj.2025.156690.1295
Authors
Hozan Tofiq Ahmed* ; Anas Hussein Yousif; Abdulkareem Ramadhan Ibrahim; Doaa Waleed Jameel
Conservative Department, College of Dentistry, University of Duhok, Kurdistan Region, Iraq
Abstract
Aims: The current study aimed to evaluate how the color stability of the composite resins was affected by the duration of light-curing time using light-emitting diode (LED) curing units and various composite shades. Materials and methods: The LED curing unit was used in different durations (10s), (20s), and (40s) for each shade (A1, A2) to prepare and polymerize samples in two shades of two different types of composite resin. The initial color parameters (L*, a*, b*, and E*) were determined using a spectrophotometer. After that, every sample was exposed to a thermocycling regimen that included 500 cycles in water at 55°C and 5°C. The final color readout was then obtained, and the Tukey-Kramer post-hoc test and ANOVA were used to ascertain the color changes. Results: Following the thermocycling regimen, the specimens' mean delta E* ranged from 0.055 to 4.151. The specimens' mean delta a*, delta L*, and delta b* were primarily negative. Most of the specimens showed noticeable color changes, shifting toward green discoloration (negative delta a*), blueish discoloration (negative delta b*), and a generally darker value (negative delta L*). Conclusion: Since the effect was more likely to depend on the composition of the constituent materials than on the actual shade categorization, the color change that the specimens experienced could not be predicted in connection to curing duration and types of composite shades. The degree of color change in composite resins was not significantly impacted by the time of the light cure or the variation in hues.
Keywords
composite resin; light-emitting diodes; color stability; light curing time; and composite shades
Supplementary Files
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