In Vivo and In Vitro Assessment of an Intraoral Dental Colorimeter

Karaağaçlioğlu, Lale; Terzioğlu, Hakan; Yılmaz, Burak; Yurdukoru, B

doi:10.1111/j.1532-849x.2009.00568.x

Cited by 24 publications

(16 citation statements)

References 18 publications

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“…Although statistically significant differences were observed between groups, it has been accepted that a E value of 3.5 or greater is considered clinically significant. 41 The groups closest to this value were the control group A and brush only group C, where the color difference ( E) was 3.54. These findings can be further explored by more long-term clinical studies.…”

Section: Discussionmentioning

confidence: 94%

“…The a* readings were slightly increased for the acid+brush group D, which indicates a shift from redness to greenness with increase in the a* value. Although statistically significant differences were observed between groups, it has been accepted that a ΔE value of 3.5 or greater is considered clinically significant . The groups closest to this value were the control group A and brush only group C, where the color difference (ΔE) was 3.54.…”

Section: Discussionmentioning

confidence: 99%

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Impact of Gastric Acid Induced Surface Changes on Mechanical Behavior and Optical Characteristics of Dental Ceramics

Kulkarni

Rothrock

Thompson

2018

Journal of Prosthodontics

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Impact of Gastric Acid Induced Surface Changes on Mechanical Behavior and Optical Characteristics of Dental Ceramics

Kulkarni

Rothrock

Thompson

2018

Journal of Prosthodontics

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“…Karaagaclioglu et al and Tung et al reported that colorimeter had better reproducibility and reliability in measuring color difference than spectrophotometer. 19,20 ShadeEye NCC TM , which was used in this study, is one of the most advanced colorimeters with spot measurement capacity of 2.5 mm in diameter in comparison with that of 5.0 mm of other spectrophotometers. 21 Edge loss can occur when measuring shade of small tooth surface using colorimeter.…”

Section: Discussionmentioning

confidence: 99%

Color change of white spot lesions after resin infiltration

Bak

Kim

Hyun

2013

Color Research & Application

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This study evaluates color change of the enamel lesion before and after resin infiltration and after thermocycling (TC) in order to assess clinical usefulness of resin infiltrant in restoring esthetics of incipient enamel caries lesions. Twenty‐five healthy premolars were prepared and crown portions were vertically cut. Specimens were emerged in acryl blocks with relatively flat proximal surface facing outside. Specimens were put in decalcification solution (50 mM acetic acid solution, 3 mM CaCl2·H2O, 3 mM KH2PO4, 6 µM methylhydroxydiphosphonate, pH 4.95, 37°C), and were kept for 160 h, in order to make white spot lesions on the exposed enamel. Degree of decalcification was observed with microscope and nine specimens were excluded because of inadequate decalcification (n = 41). L*, a*, and b* were measured with colorimeter at the baseline (T1), after production of white spot lesions (T2), after infiltration of resin infiltrants (ICON®, DMG, Hamburg, Germany) (T3), after 3000 (T4), 6000 (T5), and 10,000 cycles (T6) of TC. L* was highest at T2, but significantly decreased until T6 which was the closest value to T1 (P < 0.05). a* was highest at T2 and decreased gradually until T6, whereas b* was lowest at T2 and was highest at T3 and decreased gradually until T6. Δ Eab * less than 3.7 showed between T1 and T4, between T1 and T5, and between T1 and T6, which suggested that it was hard to differentiate one from the other clinically. Resin infiltrated lesions showed recovery of CIE value close to that of healthy enamel over time. © 2013 Wiley Periodicals, Inc. Col Res Appl, 39, 506–510, 2014

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“…The blue and yellow axes were designated by - b * and + b * , respectively. This ShadeEye NCC® intraoral shade measuring device has been used in some previous studies with an acceptable performance 21,22. The color of all-ceramic crowns was measured using a pulsed xenon Lamp as an optical light source and a vertical light receiving system.…”

Section: Methodsmentioning

confidence: 99%

Effect of the shades of background substructures on the overall color of zirconia-based all-ceramic crowns

et al. 2013

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PURPOSEThe objective of this study was to determine the effect of the color of a background substructure on the overall color of a zirconia-based all-ceramic crown.MATERIALS AND METHODSTwenty one posterior zirconia crowns were made for twenty subjects. Seven premolar crowns and six molar crowns were cemented onto abutments with metal post and core in the first and second group. In the third group, eight molar crowns were cemented onto abutments with a prefabricated post and composite core build-up. The color measurements of all-ceramic crowns were made before try-in, before and after cementation. A repeated measure ANOVA was used for a statistical analysis of a color change of all-ceramic crowns at α=.05. Twenty four zirconia specimens, with different core thicknesses (0.4-1 mm) were also prepared to obtain the contrast ratio of zirconia materials after veneering.RESULTSL*, a*, and b* values of all-ceramic crowns cemented either on a metal cast post and core or on a prefabricated post did not show significant changes (P>.05). However, the slight color changes of zirconia crowns were detected and represented by ΔE*ab values, ranging from 1.2 to 3.1. The contrast ratios of zirconia specimens were 0.92-0.95 after veneering.CONCLUSIONNo significant differences were observed between the L*, a*, and b* values of zirconia crowns cemented either on a metal cast post and core or a prefabricated post and composite core. However, the color of a background substructure could affect the overall color of posterior zirconia restorations with clinically recommended core thickness according to ΔE*ab values.

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In Vivo and In Vitro Assessment of an Intraoral Dental Colorimeter

Abstract: Within the limitations of this study, the intraoral colorimeter exhibited successful in vivo repeatability; however, the color difference detection performance of the device varied depending on the translucency of the specimens.

Cited by 24 publications

References 18 publications

Impact of Gastric Acid Induced Surface Changes on Mechanical Behavior and Optical Characteristics of Dental Ceramics

Impact of Gastric Acid Induced Surface Changes on Mechanical Behavior and Optical Characteristics of Dental Ceramics

Color change of white spot lesions after resin infiltration

Effect of the shades of background substructures on the overall color of zirconia-based all-ceramic crowns

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