IADR Abstract Archives

Outdoor Weathering of Spectromatch® Facial Intrinsic Skin Tone Pigments

Objectives: To assess outdoor weatherability of seventeen Spectromatch® pigments over a 2000-hr period.
Methods: Each pigment (5%) hand-mixed with a two-part base siloxane elastomer (A-2000), vacuum-pumped (5mtorr), and heated (84°C) to polymerization. 34mm diameter x 6mm thick discs fabricated for each pigment and assigned to an environmental group: outdoor (Lincoln, NE) or control (n=4). Outdoor samples suspended on rooftop racks, control samples stored in darkness, 25°C, 30%r.h. CIELab colorimetric measurements obtained at 0,1000,2000 hours.
Results: See table. ΔE values for Ol,OB,RB after 2000h outdoors were below 50:50 minimum perceptibility threshold limit, as were all control samples (ΔE<1.1). LG,P outdoors exceeded maximum acceptability threshold limit after 1000h (ΔE>2.7), as did DD,DG,DM,LD,LG,P,R,RM,W after 2000h. A,C,DO,Oc,Or outdoors exhibited perceptible, yet acceptable, color change at 2000h.
Conclusions: Of the seventeen Spectromatch® pigments analyzed, nine pigments (DD,DG,DM,LD,LG,P,R,RM,W) demonstrated excessive color changes, three pigments (Ol,OB,RB) were below perceptibility limits, and five (A,C,DO,Oc,Or) demonstrated perceptible, yet acceptable, color changes at 2000h.

Division: IADR/AADR/CADR General Session
Meeting: 2020 IADR/AADR/CADR General Session (Washington, D.C., USA)
Location: Washington, D.C., USA
Year: 2020
Final Presentation ID: 1880
Abstract Category|Abstract Category(s): Dental Materials 7: Color and Appearance (Esthetics)

Authors

Vakilzadian, Kevin ( University of Nebraska Medical Center , Lincoln , Nebraska , United States )

Beatty, Mark ( VA Nebraska-Western Iowa Heathcare System , Omaha , Nebraska , United States ; University of Nebraska Medical Center , Lincoln , Nebraska , United States )

Wee, Alvin ( University of Minnesota , Minneapolis , Minnesota , United States )

Simetich, Bobby ( University of Nebraska Medical Center , Lincoln , Nebraska , United States )

Financial Interest Disclosure: NONE

SESSION INFORMATION

Poster Session
Color and Appearance (Esthetics) II

TABLES

ΔE Values (Mean±s.e.) Over 2000 Hours (n=8)

Pigment	Outdoor		Control
Pigment	1000h	2000h	1000h	2000h
Aubergine (A)	1.19±0.55	1.09±0.67	0.23±0.14	0.31±0.19
Cream (C)	1.28±0.08	2.47±0.13	0.14±0.03	0.16±0.03
Dark Dapple (DD)	0.88±0.22	3.35±0.37	0.91±0.25	0.96±0.52
Deep Grey (DG)	1.43±0.07	3.05±0.12	0.13±0.07	0.15±0.13
Deep Mottle (DM)	1.54±0.39	4.26±0.76	0.14±0.11	0.28±0.15
Dark Orange (DO)	1.14±0.84	2.05±1.06	0.62±0.49	0.45±0.29
Light Dapple (LD)	2.59±0.46	8.10±0.86	0.60±0.08	0.58±0.23
Light Grey (LG)	3.00±0.35	5.42±0.09	0.20±0.13	0.17±0.11
Ochre (Oc)	0.52±0.39	1.85±0.32	0.17±0.15	0.15±0.07
Olive (Ol)	0.35±0.14	0.44±0.21	0.25±0.20	0.15±0.16
Orange (Or)	1.05±0.09	2.24±0.09	0.11±0.03	0.14±0.03
Orange-Brown (OB)	0.23±0.07	1.02±0.54	0.13±0.08	0.15±0.05
Pink (P)	3.01±0.23	5.76±0.73	0.11±0.06	0.27±0.36
Red (R)	1.65±0.18	3.88±0.33	0.15±0.07	0.20±0.02
Red-Brown (RB)	0.34±0.18	0.25±0.11	0.46±0.43	0.46±0.32
Red Mottle (RM)	1.62±0.11	6.07±0.17	0.43±0.22	0.33±0.19
White (W)	0.14±0.35	3.49±0.31	0.14±0.06	0.21±0.07