COLOR STABILITY OF CERAMIC LAMINATE VENEERS: A COMPREHENSIVE IN VIVO ANALYSIS ACROSS MULTIPLE TIME INTERVALS

Received 2023-06-24; Accepted 2024-02-26; Published 2024-08-12

Abstract

Background: The precise selection of ceramic laminate veneers by clinical practitioners is crucial due to their capacity to impart a natural and consistently uniform aesthetic to teeth, accompanied by the assurance of enduring color stability over an extended duration.
Objective: This study aimed to evaluate and compare the clinical color stability of three different manufacturing techniques of ceramic laminate veneer preparation, IPS e.max CAD/CAM, IPS e.max press, and Refractory Die, over a 2-year study period. The study also aimed to assess the average color changes within each technique and differences between them. This study will enhance our understanding of the efficacy of clinical color stability in long-term dental restoration applications.
Methods: The study sample comprised of 17 patients (9 males, 8 females) who received 27 veneers on their anterior teeth. After responding to a questionnaire regarding the potential frequency of consuming pigmented foods and beverages, the patients were divided into three groups. The refractory die technique was applied to 7 patients (11 teeth), while both IPS e.max press and IPS e.max CAD/CAM techniques were applied to 5 patients (8 teeth) each, with a veneer thickness of 0.5 mm for all veneers and luting with light-cured resin cement. Patients were monitored over three time intervals spanning two years. Student and ANOVA tests were employed to compare discoloration)∆Eab) within and between groups.
Results: Our results revealed statistically significant differences in mean ∆Eab between 6 months and both 12 and 24 months in the three groups (P < 0.05). However, comparisons between the 12- and 24-month time point revealed statistical differences only in the refractory die group. No significant statistical differences were observed when comparing the three groups with each other (P > 0.05).
Conclusion: Our study determined that ∆Eab values in all groups were deemed clinically acceptable, with no observable visual changes. Additionally, our investigation highlighted that IPS e.max Press exhibited the least discoloration values compared to other alternative methods.