The evaluation of color and color difference according to the layering placement of Incisal shade composites on the body composites of the indirect resin restoration

Article information

Restor Dent Endod. 2011;36(1):37-49

Publication date (electronic) : 2011 January 14

doi : https://doi.org/10.5395/JKACD.2011.36.1.37

Su-Jung Park, DDS, MSD ¹, Han-Young Lee, DDS, MSD, PhD ¹, Myong-Yun Nah, MD, PhD ², Hoon-Sang Chang, DDS, PhD ³, Yun-Chan Hwang, DDS, MSD, PhD ¹^,⁴, Won-Mann Oh, DDS, MSD, PhD ¹^,⁴, In-Nam Hwang, DDS, MSD, PhD ¹^,⁴^,

¹Dept. of Conservative Dentistry, Chonnam Natl. Univ. School of Dentistry, Gwangju

²Dept. of Internal Medicine, Chonnam Natinal University Hospital, Gwangju

³Wonkwang University Dental Hospital, Iksan

⁴DSRI, Chonnam Natl. Univ., Gwangju, Korea

^*Correspondence to In-Nam Hwang, DDS, MSD, PhD., Associate Professor, Dept. of Conservative Dentistry, Chonnam Natl. Univ. School of Dentistry, Yongbong-ro 77, Buk-gu, Gwangju, Korea 500-757, TEL, +82-62-530-5819; FAX, +82-62-530-5629; E-mail: hinso@jnu.ac.kr

Received 2010 October 05; Revised 2010 October 27; Accepted 2010 November 02.

Abstract

Objectives:

The aim of this study was to evaluate the surface color of indirect resin restoration according to the layering placement of different shade of incisal composite.

Materials and Methods:

In this study, CIE L*a*b* value of 16 Body composite of Tescera ATL (Bisco, Schaumburg IL, USA) was measured by spectrophotometer (NF999, Nippon Denshuku, Japan), and compared to CIE L*a*b* value of Vitapan shade guide. Nine shade Incisal composite of Tescera ATL were buildup to 1 mm thickness on Body composites inlay block, and CIE L*a*b* value was measured. Incisal composite was ground to 0.5 mm thickness and CIE L*a*b* value was re-measured. Color difference between Body composite and Incisal composites layered on Body composite was calculated as a function of thickness.

Results:

Color difference between corresponding shade of Tescera Body composite and Vitapan shade guide was from 6.88 to 12.80.

L* and b*value was decreased as layering thickness of Incisal composite on Body composite was increased. But, a* value did not show specific change tendency.

Conclusions:

Surface color difference between Body composites and Incisal composites layered on Body composite was increased as the layering thickness of Incisal composite increased (p < 0.05).

Keywords: CIE L*a*b* value; Color; Color difference; Incisal shade; Indirect resin restoration; Layering; Tescera ATL

Table 1.

Shade of used body and incisal composites

Table 2.

CIE L*a*b* average values and standard deviation (S.D) of Vitapan classical shade guide

Table 3.

CIE L*a*b* average values and standard deviation (S.D) of Tescera Body composites

Table 4.

Color difference (△E*) between vitapan shade guide and tescera body composite

Table 5.

CIE L*a*b* value of incisal composites that build-up on the A1 body composite, and color difference between body composite and incisal composite

Table 6.

CIE L*a*b* value of incisal composites that build-up on the A2 body composite, and color difference between body composite and incisal composite

Table 7.

CIE L*a*b* value of incisal composites that build-up on the A3 body composite, and color difference between body composite and incisal composite

Table 8.

CIE L*a*b* value of incisal composites that build-up on the A3.5 body composite, and color difference between bBody composite and incisal composite

Table 9.

CIE L*a*b* value of incisal composites that build-up on the A4 body composite, and color difference between body composite and incisal composite

Table 10.

CIE L*a*b* value of incisal composites that build-up on the B1 body composite, and color difference between body composite and incisal composite

Table 11.

CIE L*a*b* value of incisal composites that build-up on the B2 body composite, and color difference between body composite and incisal composite

Table 12.

CIE L*a*b* value of incisal composites that build-up on the B3 body composite, and color difference between body composite and incisal composite

Table 13.

CIE L*a*b* value of incisal composites that build-up on the B4 body composite, and color difference between body composite and incisal composite

Table 14.

CIE L*a*b* value of incisal composites that build-up on the C1 body composite, and color difference between body composite and incisal composite

Table 15.

CIE L*a*b* value of incisal composites that build-up on the C2 body composite, and color difference between body composite and incisal composite

Table 16.

CIE L*a*b* value of incisal composites that build-up on the C3 body composite, and color difference between body composite and incisal composite

Table 17.

CIE L*a*b* value of incisal composites that build-up on the C4 body composite, and color difference between body composite and incisal composite

Table 18.

CIE L*a*b* value of incisal composites that build-up on the D2 body composite, and color difference between body composite and incisal composite

Table 19.

CIE L*a*b* value of incisal composites that build-up on the D3 body composite, and color difference between body composite and incisal composite

Table 20.

CIE L*a*b* value of incisal composites that build-up on the D4 body composite, and color difference between body composite and incisal composite

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