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Optical Property Stability of Light-Cured versus Precured CAD-CAM Composites
A C M Andrade1, A B Borges1, E C Kukulka1
1Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University-UNESP, Sao Jose Dos Campos, SP, Brazil.
International Journal of Dentistry
|June 10, 2022
Summary
This study evaluated how staining affects precured (PC) and light-cured (LC) dental composites. While both composite types experienced darkening and reduced gloss, translucency, and fluorescence, the specific formulation significantly influenced the staining effects.
Area of Science:
- Dental Materials Science
- Biomaterials
- Restorative Dentistry
Background:
- Dental composites are widely used restorative materials.
- Understanding their optical property changes after staining is crucial for clinical longevity and aesthetics.
- Both precured (PC) and light-cured (LC) composites are available, with potential differences in their response to staining.
Purpose of the Study:
- To compare the changes in optical properties (color, gloss, translucency, fluorescence) of precured (PC) and light-cured (LC) dental composites after a 15-day staining protocol.
- To determine if differences exist in the staining susceptibility between PC and LC composite materials from the same manufacturers.
Main Methods:
- Four brands of light-cured (LC) composites and four corresponding precured (PC) blocks were selected.
- Baseline optical properties (color, gloss, translucency, fluorescence) were measured.
- Specimens were subjected to a 15-day staining protocol, followed by reevaluation of optical properties.
- Changes in properties (ΔGloss, ΔTranslucency, ΔFluorescence, ΔE*00) were calculated and analyzed using ANOVA and Tukey's test.
Main Results:
- All tested composites exhibited changes in optical properties after staining, including darkening and reduced gloss, fluorescence, and translucency.
- No significant differences in gloss (ΔG) and translucency (ΔT) changes were found between PC and LC materials from the same manufacturer.
- Significant differences were observed in fluorescence (ΔF) and color change (ΔE*00) between PC and LC materials for some brands, with LC composites generally showing less change.
- The effects of staining varied based on the specific composite formulation.
Conclusions:
- Both precured and light-cured composites undergo optical property alterations when exposed to staining agents.
- While gloss and translucency changes were similar between PC and LC materials, fluorescence and color stability varied, suggesting formulation-dependent responses.
- The study highlights that composite formulation is a key factor influencing the susceptibility to staining and aesthetic longevity.
