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Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
Published on: June 6, 2025
Color stability of indirect composite materials polymerized with different polymerization systems
1Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry, Tokyo, Japan. matsumura@dent.nihon-u.ac.jp
Journal of Oral Science
|June 25, 2009
Summary
Pearleste composite material demonstrated superior color stability compared to Sinfony, especially when polymerized with its proprietary system or a standard light unit. Pearleste showed minimal color change in water and tea, indicating excellent durability.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Color Science
Background:
- Indirect composite restorations are widely used in dentistry.
- Assessing the color stability of these materials under various polymerization conditions is crucial for aesthetic outcomes.
- Discoloration can negatively impact patient satisfaction and the longevity of restorations.
Purpose of the Study:
- To evaluate and compare the color stability of two indirect composite materials: Sinfony and Pearleste.
- To investigate the influence of different laboratory polymerization systems on the color stability of these composites.
- To determine the impact of immersion in water and tea on the color change of polymerized composite specimens.
Main Methods:
- Two indirect composite materials (Sinfony, Pearleste) were polymerized using proprietary systems (Visio, Pearlcure) and a metal halide unit (Hyper LII) for varying durations (60, 120, 180s).
- Specimens were stored at 37°C for 24 hours and then immersed in purified water or tea for 4 weeks.
- Color change was quantified using a dental chroma meter (ShadeEye NCC) measuring CIE 1976 L(*)a(*)b(*) values and calculating DeltaE(*)(ab).
Main Results:
- Sinfony material showed the highest color change (DeltaE(*)(ab)) when immersed in tea and polymerized with the Visio system.
- Pearleste material exhibited substantial color stability, with minimal changes observed regardless of the polymerization system or immersion medium (water or tea).
- When polymerized with the Hyper LII unit, Pearleste demonstrated significantly lower DeltaE(*)(ab) values compared to Sinfony in 11 out of 12 groups.
Conclusions:
- Pearleste material exhibits excellent color stability when polymerized with its proprietary Pearlcure system or the Hyper LII unit.
- The choice of polymerization system significantly impacts the color stability of indirect composite materials, with Pearleste showing superior performance.
- Dental professionals should consider the polymerization method and material type to ensure long-term aesthetic results for indirect composite restorations.
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