Essentials of Dentistry
Original Article

Discoloration Resistance of Various Computer Aided Design/Computer Aided Manufacturing Restorative Materials


Department of Prosthodontics, Altınbaş University, Faculty of Dentistry, İstanbul, Turkey


Department of Restorative Dentistry, İstanbul University-Cerrahpaşa, Faculty of Dentistry, İstanbul, Turkey

Essentials of Dentistry 2024; 3: 15-21
DOI: 10.5152/EssentDent.2024.24005
Read: 251 Downloads: 114 Published: 15 March 2024

Background: Evaluating the prolonged efficacy of restorative materials hinges significantly on their ability to resist discoloration. This study aims to assess the discoloration resistance of computer-aided design/computer-aided manufacturing restorative materials featuring distinct chemical compositions.

Methods: A1-colored samples from 4 diverse CAD/CAM restorative materials (Lava Ultimate, Tetric CAD, Vita Enamic, and IPS e.max CAD), each with a 2 mm thickness (n=12), were meticulously prepared. Baseline CIE L*a*b* values were measured using a spectrophotometer, and randomly assigned samples were subjected to a 28-day immersion in either distilled water (control group) or coffee (n=6). After the designated period, CIE L*a*b* values were reevaluated, and ΔEab values were computed. A 2-way analysis of variance test was employed to scrutinize the influence of both the restorative material type and solution type on quantitative variables (P < .05).

Results: In the comparison of samples immersed in coffee, IPS e.max CAD demonstrated significantly less staining than other samples, while Lava Ultimate exhibited significantly more staining (P < .05). No significant difference in ΔEab was observed among CAD/CAM restorative materials kept in distilled water. Although the ΔEab values of specimens immersed in distilled water remained below the CIELAB 50:50% acceptability threshold (ΔEab=2.7), samples immersed in coffee exceeded this threshold.

Conclusion: The resistance to discoloration is influenced by both the restorative material and the nature of the solution. Consequently, clinicians may opt for restorative materials displaying heightened discoloration resistance or provide comprehensive guidance to patients regarding staining beverages and effective oral hygiene practices.

Cite this article as: Turunç-Oğuzman R, Şişmanoğlu S. Discoloration resistance of various computer aided design/computer aided manufacturing restorative materials. Essent Dent. 2024;3(1):15-21.

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