IADR Abstract Archives

Aging-Dependent Color Changes in Universal Shade Resin Composites

Objectives: To evaluate artificial accelerated aging (AAA)-dependent color stability of universal shade resin composites.
Methods: Single-shade, disc-shaped specimens (D=10mm, 2-mm thick, n=5) of five universal shade resin composites: Omnichroma (OM; Tokuyama, Encinitas, CA), Filtek Universal (FU; 3M, St. Paul, MN), Majesty ES-2 (KM; Kuraray America, New York, NY), Admira Fusion Universal (VA; VOCO, Cuxhaven, Germany) and Venus Diamond One Shade (VD; Kulzer, South Bend, IN), were polymerized using a VALO curing light (Ultradent, South Jordan, UT) was through a Mylar strip and 1mm glass slide for 40 seconds. Specimens were polished using PoGO disk-shaped polishers (PoGo, Dentsply, York, PA) for 40 seconds. A spectrophotometer (X-Rite Ci7600 Series, Xrite, Grand Rapids, MI, USA) was used for color measurements at baseline (T0), and after AAA (SUNTEST XXL, Atlas Material Testing Technology, Chicago, IL): exposure to controlled irradiance of 150 kJ/m2 (T1) and 300 kJ/m2 (T2). CIEDE2000 color differences (ΔE00) were calculated. Means and standard deviations were determined, and data was analyzed by One-way ANOVA. Tukey's and Tamhane’s tests were used for post hoc comparisons. In addition, a 50:50% acceptability threshold (AT) of ΔE00=1.8 was used in result interpretation.
Results: A significant difference was recorded for T0-T1 and T0-T2 (p<0.001, power 1.0). T0-T1: OM, KM, and VA color differences were AT. T0-T2: OM, VA AT. T1-T2: No significant difference, all materials were Conclusions: Artificial aging-dependent color differences were exposure- and material-dependent. FU, KM and VD color changes were >AT after T2, while OM and VA exhibited good color stability (

2023 AADOCR/CADR Annual Meeting (Portland, Oregon)
Portland, Oregon
2023
0077
Dental Materials 7: Color and Appearance (Esthetics)
  • Chen, Claire  ( University of Texas School of Dentistry at Houston , Houston , Texas , United States )
  • Pereira Sanchez, Natalie  ( University of Texas School of Dentistry at Houston , Houston , Texas , United States )
  • Paravina, Rade  ( University of Texas at Houston , Houston , Texas , United States )
    • NONE
    Interactive Talk Session
    Dental Materials: Color and Appearance II
    Wednesday, 03/15/2023 , 08:00AM - 09:30AM
    Mean ΔE00 (s.d.), among T0, T1 and T2
    MaterialT0-T1T0-T2T1-T2
    OM0.9a (0.2)1.6a,b (0.2)0.8(0.2)
    FU2.0b (0.2)2.3c,d (0.1)0.6(0.1)
    KM1.4a (0.3)2.1b,c,d (0.2)0.7(0.0)
    VA1.0a (0.4)1.4a,b (0.2)0.6(0.3)
    VD2.5a,b (1.2)2.5a,b,c,d (1.0)0.8(0.5)