Colour stability comparison between ormocer nanohybrid composites and udma-based nanocomposites after immersion in...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Color stability is vital for the longevity and aesthetics of dental restorations.
• Exposure to environmental factors like coffee can cause discoloration in dental composites.
• Understanding material composition effects on stain resistance is essential for clinical success.

Purpose of the Study:

• To compare the color stability of an Ormocer-based nanohybrid composite and a UDMA-based nanocomposite when exposed to coffee.
• To analyze the impact of coffee immersion on the discoloration of different dental composite materials.
• To evaluate the stain resistance properties of nanohybrid composites versus nanocomposites.

Main Methods:

• Forty composite discs (20 Ormocer-based, 20 UDMA-based) in shade A2 were prepared.
• Ten discs of each material were immersed in coffee, and ten in water for 12 days.
• Color change (ΔE) was measured before and after immersion using a spectrophotometer.

Main Results:

• Both composite types exhibited color change after 12 days of immersion.
• The UDMA-based nanocomposite showed significantly greater discoloration than the Ormocer-based nanohybrid composite.
• Coffee immersion resulted in significantly more color change compared to water immersion for both materials.

Conclusions:

• Ormocer-based nanohybrid composites demonstrate superior color stability compared to UDMA-based nanocomposites when exposed to coffee.
• The choice of composite material significantly impacts stain resistance in the oral environment.
• Dental materials must possess adequate stain resistance to maintain aesthetic longevity in restorations.