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Effect of hydrogen peroxide on color and whiteness of resin‐based composites
Author(s) -
Pecho Oscar E.,
Martos Josué,
Pinto Karoline V. A.,
Pinto Karine V. A.,
Baldissera Rudimar A.
Publication year - 2018
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12443
Subject(s) - hydrogen peroxide , composite material , materials science , color difference , resin composite , composite number , dentistry , mathematics , chemistry , computer science , artificial intelligence , medicine , enhanced data rates for gsm evolution , organic chemistry
Abstract Objective To evaluate the influence of a 35% hydrogen peroxide gel on color and whiteness changes of resin‐based composites (RBC). Materials and Methods Discs ( n = 10; shade A3.5 enamel; and 8 mm diameter and 2 mm thick) were fabricated from three RBC (DF‐ Durafill, Heraeus Kulzer; ED‐ IPS Empress Direct, Ivoclar Vivadent; and AP‐ Amelogen Plus, Ultradent Products). Three subgroups were obtained for each RBC: before bleaching ( T 0 ) and after first ( T 1 ) and second ( T 2 ) bleaching applications. A dental spectrophotometer (VITA Easyshade, Vita Zahnfabrik) was used to obtain CIELAB color coordinates and whiteness index for dentistry (WI D ) in all periods. CIELAB ( Δ E ab * ) and CIEDE2000 ( ΔE 00 ) color differences were also obtained. Perceptibility (PT) and acceptability (AT) thresholds were used to analyze values ofΔ E ab * , ΔE 00 , and ΔWI D . Two‐way analysis of variance (ANOVA; for L *, a *, b *, and WI D ) and one‐way ANOVA and Tukey tests (forΔ E ab * and ΔE 00 ) were used to analyzed the results (α = 0.05). Results L * and WI D values from all RBC did not change after bleaching applications ( T 1 and T 2 ) ( P > .05). There were no significant differences in color differences ( Δ E ab * and ΔE 00 ) among all RBC evaluated after bleaching applications ( T 1 ‐ T 0 and T 2 ‐ T 0 ; P > .05). Regardless of the RBC, mean values of ΔE 00 between all different periods were always below 50%:50% PT value. Conclusions The 35% hydrogen peroxide bleaching gel influences on color and whiteness of resin‐based composites. However, color changes were not clinically perceived and whiteness variations were clinically acceptable. Clinical Significance Patients should be advised that existing composite restorations might not match the natural tooth color after bleaching, and their replacement may be required.