Journal List > J Korean Acad Conserv Dent > v.34(4) > 1056363

Mun, Park, Cho, Hwang, Oh, and Hwang: Influence of the color of composite resins applied to lingual surface on the labial tooth color

Abstract

In this study we evaluated the influence of both the thickness of residual enamel and the color of the composite resins applied to lingual surface on the labial surface color.
Background plates were made by randomly (A1, A2, A6D, B1, B2, B3, C1, C2, C6D) selected colors of Filtek Supreme (3M ESPE, St. Paul, U.S.A.) composite resin.
Crown portion of 9 maxillary central incisors were cut off and embedded with acrylic resin except labial surface. Samples of average thickness of 2.2 mm were obtained after cutting it in a thickness of 2.5 mm from the labial surface and sandpaper polish.
The shade of composite resin background was measured using Spectrophotometer (Spectrolino® GretagMacbeth, Regensdorf, Switzerland). And CIE L*a*b* value of 2.2 mm thickness tooth samples were measured on the 9 composite resin backgrounds. And then, the cutting side of tooth samples was ground to the extent of 1.9 mm, 1.6 mm, 1.3 mm, 1.0 mm and placed on composite resin backgrounds and measured L*a*b* values with the same method.
In all samples, L* value and b* value seemed to have a tendency of decreasing as thickness of tooth sample becomes thinner regardless of background colors (p < 0.05). But, a* value didn't show the significant differences depending on the thickness.

Figures and Tables

Figure 1
L* value of the TS1 (upper) and TS8 (lower) according to thickness of teeth specimen on various resin backgrounds.
jkacd-34-309-g001
Figure 2
a* value of the TS1 (upper) and TS8 (lower) according to thickness of teeth specimen on various resin backgrounds.
jkacd-34-309-g002
Figure 3
b* value of the TS1 (upper) and TS8 (lower) according to thickness of teeth specimen on various resin backgrounds.
jkacd-34-309-g003
Table 1
L*a*b* average values of 2.2 mm thickness teeth specimen on the background resin specimens
jkacd-34-309-i001
Table 2
L*a*b* average values of 1.9 mm thickness teeth specimen on the background resin specimens
jkacd-34-309-i002
Table 3
L*a*b* average values of 1.6 mm thickness teeth specimen on the background resin specimens
jkacd-34-309-i003
Table 4
L*a*b* average values of 1.3 mm thickness teeth specimen on the background resin specimens
jkacd-34-309-i004
Table 5
L*a*b* average values of 1.0 mm thickness teeth specimen on the background resin specimens
jkacd-34-309-i005
Table 6-1
L*a*b* values of the background resin composites
jkacd-34-309-i006
Table 6-2
Color difference (ΔE*) of the background resins among different shade
jkacd-34-309-i007
Table 7
Color difference (ΔE*) of the TS1 (upper) and TS8 (lower) tooth specimen among different background at 2.2 mm thickness
jkacd-34-309-i008
Table 8
Color difference (ΔE*) of the TS1 (upper) and TS8 (lower) tooth specimen among different background at 1.9 mm thickness
jkacd-34-309-i009
Table 9
Color difference (ΔE*) of the TS1 (upper) and TS8 (lower) tooth specimen among different background at 1.6 mm thickness
jkacd-34-309-i010
Table 10
Color difference (ΔE*) of the TS1 (upper) and TS8 (lower) tooth specimen among different background at 1.3 mm thickness
jkacd-34-309-i011
Table 11
Color difference (ΔE*) of the TS1 (upper) and TS8 (lower) tooth specimen among different background at 1.0 mm thickness
jkacd-34-309-i012

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