Color stability of two different resin matrix ceramics: randomized clinical trial

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Aesthetic Dentistry

Background:

• Tooth restoration color mismatch is a primary cause of aesthetic failure and replacement, particularly after aging.
• Maintaining long-term color stability in dental restorations is crucial for patient satisfaction and clinical success.

Purpose of the Study:

• To compare the color stability of Cerasmart hybrid ceramic and Vita Enamic polymer-infiltrated ceramic network (PICN) crowns after one year of clinical service.
• To evaluate the aesthetic outcomes of two different CAD/CAM materials for endodontically treated molars.

Main Methods:

• 102 participants with endodontically treated first molars received either Cerasmart or Vita Enamic crowns.
• Color differences (ΔE) were measured using a digital spectrophotometer at baseline, 6 months, and 12 months.
• Statistical analysis included Mann-Whitney tests to compare color parameters between groups.

Main Results:

• At 6 months, Vita Enamic showed significantly higher changes in lightness (ΔL*) and red-green (Δa*) values compared to Cerasmart.
• After 12 months, Vita Enamic restorations exhibited greater color change than Cerasmart (p=0.0120).
• Despite differences at specific time points, overall color stability was comparable between the two materials within the 1-year period.

Conclusions:

• Both Cerasmart and Vita Enamic demonstrated acceptable color stability after one year of clinical use.
• Cerasmart exhibited superior color stability compared to Vita Enamic after 12 months.
• The findings suggest Cerasmart may offer better long-term aesthetic maintenance for molar restorations.