Your browser does not support the NLM PubReader view.

Go to this page to see a list of supporting browsers.

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, MSD1, Han-Young Lee, DDS, MSD, PhD1, Myong-Yun Nah, MD, PhD2, Hoon-Sang Chang, DDS, PhD3, Yun-Chan Hwang, DDS, MSD, PhD1,4, Won-Mann Oh, DDS, MSD, PhD1,4, In-Nam Hwang, DDS, MSD, PhD1,4,
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

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

Shade of used body and incisal composites

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

References

1. Schwartz RS, Summitt JB, William Robbins J. Fundamentals of operative dentistry. Quintessence Publishing Co.. Chicago IL: 1996. p. p210–215.
2. Ferracame JL, Marker VA. Solvent Degradation and Reduced Fracture Toughness in Aged Composites. J Dent Res 1992;71:13–19.
3. Robinson PB, Moore BK, Swartz ML. Comparison of Microleakage in Direct and Indirect Composite Resin Restoration in Vitro. Oper Dent 12:113–116. 1987;
4. Stanley L, Karl F. Clinical evaluation of a heat-treated resin composite inlay : 3-year results. Am J Dent 1992;5:258–262.
5. Schwartz RS, Summitt JB, William Robbins J. Fundamentals of operative dentistry. Quintessence Publishing Co.. Chicago IL: 1996. p. p234–235.
6. Clark EB. An analysis of tooth color. J Am Dent Assoc 1931;18:2093–2103.
7. Clark EB. Tooth color selection. J Am Dent Assoc 1933;20:1065–1073.
8. Miller LL. Shade matching. J Esthe Dent 1993;5:143–153.
9. Miller LL. Organizing color in dentistry. J Am Dent Assoc (Special Issue) 1987 December;:26–40.
10. Hayashi T. Medical color standard. V. Tooth crown. Tokyo: Japan Color Research Institute; 1967.
11. Sproull RC. Color matching in dentistry. Part Ⅱ: Practical applications of the organization of color. J Prosthet Dent 1973;29:556–566.
12. Lemire PA, Burk B. Color in dentistry. Hartford: CT J.M Ney Co.; 1975.
13. Grajower R, Revah A, Sorin S. Reflectance spectra of natural and acrylic teeth. J Prosthet Dent 1976;36:570–579.
14. Macentee M, Lakowski R. Instrumental color measurement of vital and extracted teeth. J Oral Rehab 1981;8:203–208.
15. Goodkind RJ, Schwabacher WB. Use of a fiber-optic colorimeter for in vivo color measurements of 2830 anterior teeth. J Prosthet Dent 1987;58:535–542.
16. Park HK, Chung CH. A study on the color of Korean natural teeth. J Kor Acad Prosthet Dent 1988;26:185–196.
17. Hwang IN, Oh WM. Colorimetric analysis of extracted human teeth and five shade guides. J Kor Acad Cons Dent 1997;22:769–781.
18. Cho KM, Shin DH. Color analysis of the natural teeth with a modified intraoral spectrophotometer. J Kor Acad Cons Dent 1998;23:223–235.
19. Kim HS, Um CM, Kahng MH. A study on color differences between composite resins and shade guides. J Kor Acad Cons Dent 1996;21:107–120.
20. Cho KY, Hwang IN, Choi HR, Oh WM. Comparative evaluation of light-cured composite resins based on Vita shade by spectrocolorimeter. J Kor Acad Cons Dent 1998;23:424–432.
21. Preston JD. Current status of shade selection and color matching. Quint Int 1985;16:47–58.
22. Knispel G. Factors affecting the process of color matching restorative materials to natural teeth. Quint Int 1991;22:525–531.
23. Hwang IN, Lee KW. Translucency of light cured composite resins depends on thickness and its influence on color of restorations. J Kor Acad Cons Dent 1499924:585–603.
24. Hwang IN, Park SJ, Kim SW, Kim TG, Youm CM, Cho SJ, Hwang YC, Park YJ, Oh WM. The influence of layering placement of different shade composite resins on surface color. J Kor Res Soc Dent Mater 2003;30:325–335.
25. O'Brien WJ, Groh CL, Boenke KM. A new small-color-difference equation for dental shades. J Dent Res 1990;69:1762–1764.
26. Cook WD, McAree DC. Optical properties of esthetic restorative materials and natural dentition. J Biomed Mater Res 1985;19:169–488.
27. Grajower R, Fuss Z, Hirschfeld Z. Reflectance spectra of composite resins on liners. J Prosthet Dent 1979;41:650–656.
28. Grajower R, Wozniak WT, Lindsay JM. Optical properties of composite resins. J Oral Rehabil 1982;9:389–399.
29. Yeh CL, Miyagawa Y, Powers JM. Optical properties of composites of selected shades. J Dent Res 1982;61:797–801.
30. Johnston WM, Ma T, Kienle BH. Translucency parameter of colorants for maxillofacial prostheses. Int J Prosthet 1995;8:79–86.
31. Miyagawa Y, Powers JM. Prediction of color of an esthetic restorative material. J Dent Res 1983;62:581–584.
32. Kubelka P. New contributions to the optics of intensely light scattering materials Part I. J Opt Soc Am 1948;38:448–457.

Article information Continued

Copyright © 2011 The Korean Academy of Conservative Dentistry

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Table 1.

Shade of used body and incisal composites

Body shade Lot. No Incisal shade (Code) Lot. No.
A1 0500002113, 2007-09 Light yellow (ILY) 0500010731 2008-06
A2 0600000295, 2008-10 Super transparent (ST) 0400010117 2007-01
A3 0600001396, 2008-12 Clear (IC) 0500009034 2008-06
A3.5 0500005937, 2008-05 Neutral (IN) 0500002114 2007-11
A4 0500007206, 2008-06 Yellow (IY) 0500002637 2007-09
B1 0500002980, 2007-12 Blue (IB) 0400004112 2006-08
B2 0600000916, 2008-05 Frost (IF) 0500008146 2007-04
B3 0600000837, 2008-06 Pink (IP) 0300812350 2006-08
B4 0500009037, 2007-05 Gray (IG) 0500009632 2008-10
C1 0500008412, 2007-05    
C2 0500008413, 2007-05    
C3 0500008430, 2007-05    
C4 0500006360, 2007-05    
D2 0500008431, 2007-05    
D3 0500008432, 2007-05    
D4 0500008433, 2007-05    

Table 2.

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

  L* S.D a* S.D b* S.D
A1 55.72 0.50 −1.50 0.17 5.91 0.56
A2 55.54 0.21 −0.91 0.10 8.51 0.30
A3 52.23 0.21 −0.45 0.04 10.31 0.49
A3.5 51.16 0.12 −0.01 0.06 13.57 0.06
A4 48.62 0.34 0.14 0.05 13.01 0.31
B1 53.46 0.21 −1.79 0.04 4.81 0.11
B2 56.01 0.21 −1.94 0.06 8.87 0.08
B3 51.48 0.05 −0.85 0.05 12.92 0.31
B4 52.35 0.28 −0.78 0.06 14.06 0.12
C1 51.63 0.42 −1.26 0.12 6.15 0.24
C2 49.97 0.21 −0.98 0.09 9.38 0.19
C3 48.56 0.30 −0.80 0.05 9.99 0.11
C4 46.29 0.03 0.25 0.02 12.07 0.04
D2 50.44 0.16 −1.22 0.02 5.34 0.20
D3 50.20 0.18 −0.68 0.05 8.12 0.10
D4 48.47 0.30 −1.58 0.02 10.64 0.50

Table 3.

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

  L* S.D a* S.D b* S.D
A1 64.55 0.47 −3.36 0.33 1.12 0.33
A2 63.88 0.38 −3.26 0.31 3.52 0.35
A3 61.94 0.32 −2.49 0.28 3.94 0.36
A3.5 58.31 0.33 −1.51 0.40 6.86 0.41
A4 54.30 0.42 −0.66 0.19 9.22 0.52
B1 65.84 0.44 −3.81 0.28 2.30 0.28
B2 64.01 0.61 −4.06 0.45 3.19 0.34
B3 60.36 0.50 −2.88 0.33 6.52 0.33
B4 58.04 0.59 −2.66 0.25 8.22 0.36
C1 60.25 0.36 −2.86 0.28 −0.02 0.23
C2 55.74 0.45 −2.09 0.26 4.08 0.20
C3 52.66 0.22 −1.37 0.23 3.93 0.25
C4 51.48 0.44 −0.64 0.18 5.04 0.45
D2 58.79 0.33 −2.04 0.24 1.41 0.34
D3 57.53 0.55 −1.57 0.33 3.29 0.50
D4 56.54 0.52 −1.80 0.40 4.69 0.47

Table 4.

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

Shade A1 A2 A3 A3.5 A4 B1 B2 B3 B4 C1 C2 C3 C4 D2 D3 D4
△E* 10.22 10.00 11.79 9.92 6.88 12.80 10.04 11.13 8.36 10.73 7.92 7.34 8.78 9.27 8.83 10.03

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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 63.69 −4.18 2.55 56.97 −3.45 −0.27 1.86 7.71
A1 Body ST 62.39 −4.20 1.78 55.82 −3.26 −0.30 2.41 8.85
  IC 63.10 −4.07 0.83 58.09 −2.02 −4.38 1.64 8.59
L*: 64.55 IN 62.23 −2.51 1.29 56.61 −1.62 −0.95 2.48 8.39
a*: -3.36 IY 65.18 −4.40 1.81 55.62 −3.03 4.29 1.4 9.49
b*: 1.12 IB 61.04 −3.60 −0.22 53.90 −3.06 −5.00 3.77 12.29
  IF 62.58 −3.92 1.10 58.97 −3.71 −0.56 2.05 5.84
  IP 64.39 −4.03 3.32 58.37 −1.95 1.32 2.31 6.34
  IG 62.80 −4.96 3.86 52.94 −3.18 1.99 3.62 11.65

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 61.22 −4.02 3.11 56.05 −3.25 0.90 2.80 8.26
A2 Body ST 61.63 −2.65 1.62 54.70 −1.66 −1.62 3.01 10.64
  IC 62.91 −3.48 0.54 57.28 −1.98 −3.86 3.14 9.98
L*: 63.88 IN 59.78 −2.71 1.99 55.88 −1.47 −0.86 4.41 9.29
a*: -3.26 IY 60.68 −4.18 6.01 56.33 −3.12 5.56 4.17 7.83
b*: 3.52 IB 58.89 −3.95 0.57 52.82 −3.19 −3.41 5.84 13.05
  IF IP 63.09 62.66 −3.68 -3.48 3.06 5.31 59.09 56.33 −2.89 -1.60 0.45 1.73 1.01 2.18 5.71 7.93
  IG 63.26 −4.46 6.10 55.57 −2.80 3.24 2.92 8.33

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 62.43 −3.10 3.77 55.53 −1.62 1.34 0.81 6.97
A3 Body ST 61.36 −3.15 1.74 56.13 −2.08 −2.20 2.36 8.45
  IC 62.84 −3.18 0.55 57.18 −2.05 −4.71 3.58 9.88
L*: 61.94 IN 59.87 −2.32 2.27 55.28 −0.70 −1.61 2.66 8.84
a*: -2.49 IY 61.46 −3.59 6.05 54.71 −2.41 3.65 2.43 7.23
b*: 3.94 IB 58.82 −3.16 −0.20 53.58 −2.85 −3.62 5.22 11.27
  IF 61.00 −2.22 2.09 56.97 −2.59 −0.89 2.09 6.92
  IP 60.08 −2.49 4.44 55.55 −1.29 1.60 1.92 6.91
  IG 61.26 −4.25 5.67 54.15 −2.62 1.87 2.57 8.05

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 58.63 −1.56 4.36 53.35 −1.83 0.24 2.53 8.28
A3.5 Body ST 58.80 −2.51 3.54 54.08 −1.69 −0.48 3.50 8.49
  IC 58.96 −2.20 0.29 55.13 −0.82 −5.65 6.64 12.93
L*: 58.31 IN 58.38 −2.11 3.08 53.21 −0.42 −2.36 3.83 10.60
a*: -1.51 IY 59.57 −3.14 6.12 52.25 −1046 3.26 2.20 7.05
b*: 6.86 IB 56.76 −2.74 1.71 49.60 −1.23 −5.16 5.52 14.85
  IF 60.05 −2.82 2.15 56.89 −2.53 −1.36 5.19 8.41
  IP 57.77 −1.30 4.49 54.82 −0.83 0.74 2.45 7.08
  IG 58.74 −2.96 6.74 52.70 −1.76 1.37 1.52 7.86

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 55.41 −1.69 2.75 51.46 −1.18 −1.35 6.65 10.95
A4 Body ST 56.13 −1.16 1.13 51.74 −0.73 −3.51 8.31 12.99
  IC 55.01 −1.37 4.73 51.77 −1.61 −0.23 4.60 9.82
L*: 54.30 IN 55.05 −0.41 2.86 51.43 0.16 −1.17 6.41 10.81
a*: -0.66 IY 55.79 −1.56 2.37 53.44 −1.14 −2.98 7.06 12.24
b*: 9.22 IB 53.29 −1.57 0.54 48.87 −1.24 −5.98 8.78 16.15
  IF 53.77 −1.12 3.94 48.26 −1.19 0.68 5.32 10.47
  IP 54.16 −0.37 4.57 50.53 1.55 −3.81 4.66 13.75
  IG 56.19 −0.62 1.00 54.21 −0.26 −7.28 8.43 16.50

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 65.50 −5.21 3.16 58.01 −3.78 2.12 1.68 7.83
B1 Body ST 64.82 −4.20 2.27 57.27 −3.85 −0.55 1.09 9.03
  IC 65.38 −4.32 0.26 58.12 −3.05 −4.43 2.16 10.27
L*: 65.84 IN 63.16 −3.48 2.66 55.72 −1.73 −1.34 2.72 10.95
a*: -3.81 IY 61.32 −3.94 3.63 55.33 −3.95 4.54 4.72 10.75
b*: 2.30 IB 62.91 −4.55 0.10 54.45 −2.84 −5.12 3.74 13.63
  IF 65.27 −4.97 5.05 58.39 −3.41 0.01 3.04 7.80
  IP 62.40 −3.30 3.39 54.39 −1.31 0.61 3.65 11.84
  IG 66.09 −4.30 4.91 56.25 −3.24 3.59 2.67 9.70

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 61.80 −4.68 3.32 55.21 −3.19 0.68 2.30 9.19
B2 Body ST 61.55 −4.93 3.31 58.00 −3.92 −0.49 2.61 7.04
  IC 63.13 −4.98 1.43 58.66 −3.02 −4.33 2.16 9.28
L*: 64.01 IN 61.22 −3.47 1.78 55.37 −2.12 −0.87 3.18 9.74
a*: -4.06 IY 60.29 −4.35 6.69 55.06 −3.19 3.86 5.11 9.02
b*: 3.19 IB 59.77 −4.62 0.07 52.12 −3.34 −4.94 5.29 14.41
  IF 62.12 −4.30 3.07 58.84 −3.27 −0.26 1.90 6.26
  IP 60.37 −3.74 3.87 55.42 −2.21 0.75 3.72 9.12
  IG 59.57 −3.86 5.22 54.69 −3.13 2.66 4.89 9.37

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 57.95 −2.88 2.70 55.01 −2.91 0.56 4.52 8.01
B3 Body ST 59.89 −3.57 3.50 54.14 −2.28 −1.57 3.13 10.23
  IC 59.76 −1.78 −0.01 56.04 −1.66 −4.85 6.65 12.23
L*: 60.36 IN 58.61 −2.11 3.39 52.96 −0.35 −2.63 3.67 12.04
a*: -2.88 IY 59.08 −3.50 7.52 52.67 −2.50 3.82 1.74 8.17
b*: 6.52 IB 57.44 −3.74 1.64 51.32 −2.76 −6.13 5.76 15.56
  IF 61.05 −2.10 2.76 58.20 −2.54 −0.46 3.91 7.32
  IP 60.38 −2.48 3.62 54.23 −2.14 1.53 2.93 7.94
  IG 59.00 −3.40 5.58 53.37 −2.63 3.42 1.74 7.66

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 58.29 −3.10 3.17 53.19 −2.35 0.38 5.07 9.23
B4 Body ST 58.73 −2.60 4.05 51.75 −0.88 −2.73 4.23 12.75
  IC 59.66 −3.32 1.55 55.37 −1.76 −5.34 6.90 13.85
L*: 58.04 IN 57.90 −2.88 5.89 52.96 −1.03 −1.76 2.34 11.31
a*: -2.66 IY 57.48 −2.78 7.78 52.74 −2.10 3.64 0.72 7.03
b*: 8.22 IB 56.84 −2.84 −0.46 50.15 −2.39 −5.83 8.77 16.12
  IF 59.67 −2.72 0.83 56.06 −2.09 −1.95 7.57 10.38
  IP 58.07 −2.65 5.52 51.26 −0.74 −0.12 2.71 10.92
  IG 57.12 −3.18 5.54 52.43 −2.23 1.36 2.88 8.87

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 59.19 −3.47 −0.11 53.72 −1.05 −1.82 1.22 7.02
C1 Body ST 59.37 −3.51 −1.84 53.99 −2.44 −4.32 2.12 7.61
  IC 60.23 −3.14 −3.85 56.03 −1.99 −7.93 3.84 9.01
L*: 60.25 IN 56.20 −1.57 −1.98 53.96 −1.41 −2.95 4.68 7.09
a*: -2.86 IY 57.39 −3.78 3.02 53.67 −2.74 2.09 4.28 6.91
b*: -0.02 IB 57.81 −3.69 −1.34 51.39 −2.73 −6.08 2.89 10.74
  IF 59.74 −4.01 0.10 58.57 −3.14 −1.64 1.26 2.35
  IP 57.68 −2.90 0.86 52.22 −1.85 −0.86 2.73 8.14
  IG 57.90 −3.80 2.62 53.60 −2.74 0.78 3.66 6.71

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 56.21 −2.99 0.74 53.21 −2.38 −1.71 3.49 6.33
C2 Body ST 53.76 −1.74 −1.00 54.66 −2.24 −3.94 5.46 8.10
  IC 58.16 −2.39 −0.96 54.64 −1.03 −7.59 5.59 11.77
L*: 55.74 IN 54.97 −1.51 −0.74 52.55 −0.97 −3.57 4.91 8.36
a*: -2.09 IY 53.77 −2.86 3.50 50.98 −1.95 1.10 2.20 5.62
b*: 4.08 IB 52.68 −2.62 −1.42 50.33 −2.08 −5.98 6.31 11.42
  IF 56.40 −2.46 −0.43 56.05 −2.55 −3.93 4.57 8.02
  IP 54.50 −1.83 1.23 52.51 −1.49 −1.11 3.12 6.14
  IG 54.47 −2.84 3.67 53.42 −2.58 1.25 1.54 3.69

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 53.45 −2.17 −1.24 52.60 −2.81 −3.28 5.29 7.35
C3 Body ST 55.03 −1.31 0.31 52.34 −2.18 −5.35 4.33 9.32
  IC 53.14 −1.62 −3.97 53.43 −1.80 −8.27 7.92 12.23
L*: 52.66 IN 54.25 −0.21 −1.19 50.62 −0.94 −4.72 5.48 8.90
a*: -1.37 IY 52.80 −2.09 0.99 50.85 −2.58 −0.60 3.03 5.03
b*: 3.93 IB 51.23 −2.19 −3.18 48.90 −1.53 −7.65 7.29 12.18
  IF 55.31 −2.88 −1.53 55.63 −3.19 −3.85 6.25 8.52
  IP 54.30 −0.93 −0.37 51.53 −0.87 −3.75 4.62 7.78
  IG 52.50 −2.62 2.57 51.16 −1.72 −0.83 1.85 5.00

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 52.03 −1.27 −0.37 53.01 −1.97 −2.86 5.47 8.15
C4 Body ST 52.86 −1.28 1.29 51.56 −1.47 −4.24 4.04 9.31
  IC 53.15 −0.68 −4.05 54.19 −1.75 −7.52 9.24 12.90
L*: 51.48 IN 52.09 −1.22 −0.96 51.14 −0.91 −4.53 6.05 9.58
a*: -0.64 IY 51.41 −1.69 2.55 51.37 −1.68 −1.03 2.70 6.15
b*: 5.04 IB 51.32 −1.20 −1.24 51.40 −1.64 −6.42 6.31 11.50
  IF 54.16 −1.40 −1.35 55.33 −2.18 −4.95 6.97 10.81
  IP 51.42 −0.26 1.00 51.64 −0.63 −2.10 4.06 7.13
  IG 51.34 −1.49 3.86 51.81 −1.69 −1.78 1.46 6.90

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 57.52 −2.71 1.61 55.37 −1.58 −2.02 1.44 4.87
D2 Body ST 58.16 −2.77 −1.07 55.22 −2.23 −3.54 2.65 6.10
  IC 59.60 −2.29 −2.68 57.32 −2.30 −6.53 4.18 8.08
L*: 58.79 IN 56.54 −1.37 −0.69 54.82 −0.95 −3.47 3.15 6.38
a*: -2.04 IY 57.83 −3.06 3.84 53.85 −2.69 2.21 2.81 5.05
b*: 1.41 IB 56.66 −2.83 −2.28 52.45 −2.56 −6.82 4.33 10.39
  IF 57.89 −3.01 0.08 58.30 −3.26 −2.26 1.87 3.89
  IP 57.36 −2.22 −0.37 54.62 −1.98 −1.53 2.28 5.10
  IG 57.47 −2.67 2.61 55.12 −1.27 0.26 1.89 3.92

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 57.90 −3.49 2.94 54.54 −3.45 −1.28 1.98 5.78
D3 Body ST 57.27 −2.20 1.48 54.53 −2.11 −3.35 1.93 7.31
  IC 57.70 −2.36 −2.47 56.89 −1.95 −6.42 5.82 9.74
L*: 57.53 IN 56.54 −2.38 1.06 54.33 −0.24 −4.18 2.57 8.24
a*: -1.57 IY 55.31 −3.45 5.24 54.10 −2.42 1.73 3.50 3.86
b*: 3.29 IB 56.28 −3.12 −0.45 53.79 −2.76 −6.10 4.24 10.18
  IF 58.72 −2.45 0.43 58.50 −2.79 −2.34 3.22 5.84
  IP 57.48 −2.50 2.35 52.41 −0.86 −1.74 1.32 7.21
  IG 56.38 −3.22 3.35 55.35 −2.99 0.78 2.01 3.62

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness 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

  Body + Inc 0.5 mm
 Body + Inc 1.0 mm
 ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 59.86 −3.49 1.33 55.99 −2.83 −1.44 5.02 6.24
D4 Body ST 57.92 −2.33 0.12 54.77 −2.31 −3.58 4.80 8.47
  IC 58.91 −1.30 −0.82 57.65 −1.52 −6.97 6.02 11.71
L*: 56.54 IN 57.89 −2.13 0.41 53.03 −0.64 −3.14 4.49 8.65
a*: -1.80 IY 56.89 −2.50 3.79 53.27 −2.10 1.44 1.19 4.61
b*: 4.69 IB 55.78 −2.26 −0.71 52.24 −1.82 −6.42 5.46 11.91
  IF 59.23 −3.19 −0.22 56.52 −3.12 −2.44 5.77 7.24
  IP 57.68 −1.79 1.42 55.05 −1.27 −1.76 3.46 6.64
  IG 57.77 −2.55 4.10 55.19 −1.77 1.62 1.56 3.35

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.