An Analysis of Tooth Color

Clark, E. Bruce

doi:10.14219/jada.archive.1931.0317

Cited by 52 publications

(62 citation statements)

References 1 publication

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“…[8][9][10][11] Although there have been improvements in esthetic dental materials, intraoral shade matching has not changed appreciably since its initial use. 12,13 Visual shade selection based on a shade guide is the most frequently used method of color determination in dental practice.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Color Changes in the Vitapan Classical Shade Guide After Disinfection

Alshethri

2014

Operative Dentistry

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The shade guide must remain consistent in the shade-matching process. If there is a perceptible color change in the shade guide, the result will be inconsistent shade determination and, thus, an unacceptable restoration. SUMMARYThe purpose of this study was to evaluate how one, two, and three years of simulated treatments affect the colors of Vitapan Classical Shade Guide tabs after being chemically disinfected. Ten shade tabs (one, control; nine, disinfection) were evaluated visually and by chromameter for color changes after disinfection. Results showed that 0.62 DE was found after three years of disinfection. The color changes in the shade guide tabs were perceptible or noticeable to the human eye in eight out of 45 shade tabs (17.8%) after two years and in 13 out of 45 shade tabs (28.9%) after three years of treatment. It was concluded that one shade guide should be retained as a control and periodically compared with the shade guide in use to determine when the shade tabs in use should be replaced or discarded.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Color Changes in the Vitapan Classical Shade Guide After Disinfection

Alshethri

2014

Operative Dentistry

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“…치과계에서는 1930년대 초 Clark [18][19][20] 이 시감각에 의해 치아 색상을 측정한 이래 현재까지도 이러한 방법에 대부분 의존하고 있다. 하지만 인간의 눈을 통해 인지되고 판단되 는 물체의 색은 절대적일 수 없다.…”

Section: ⅳ 총괄 및 고찰unclassified

Influence of the labial surface irregularity on the measurement of the tooth color by spectrometer

Choi

Park

Cho

et al. 2007

J Korean Acad Conserv Dent

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The most scientific and reliable method for deciding the tooth color is the instrumental measurement. However, such color measuring instrument shows the difference of the measuring value according to the diversified measuring condition.This study was conducted to evaluate what effect of the labial surface irregularity of the tooth to the result of the color measured by spectrometer.11 models of the teeth were made by injecting the A2 shade Luxatemp Automix Plus (DMG, Germany) into the impression acquired from 11 adults. Standard disk samples (15 ㎜ diameter, 7 ㎜ thickness) were made with same material. CIE L*a*b* value was measured at the incisal, central, and gingival area of the central incisor, lateral incisor, canine and first premolar using Specbos 2100 (JETI, Germany) spectrometer. Color difference was calculated between labial surface and standard samples.Among all models of the teeth, L* and b* value showed the reducing tendency as they go toward the gingival area, but a* value showed the increasing tendency.Color difference between model teeth and standard samples showed the most difference at the incisal area, but the gingival area showed the least difference. And the canine showed the least color difference from the comparison of standard sample, and the central incisor showed the highest difference (p < 0.01).Although the visually detectable difference of the measuring value showed notably depending on the type and measured area (p < 0.05), L* and a* value showed notable differences depending more on the measured areas than on the type of the teeth. [J Kor Acad Cons Dent 32(5): [411][412][413][414][415][416][417][418] 2007]

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“…따라서 enamel shell의 부피 손실이 많으면 치관부 견고성의 균형이 손상 되므로 치질을 삭제할 때 가능한 법랑질 구조를 남겨야 한 다고 하였다. 복합레진을 이용한 수복에서 심미적인 결과를 얻기 위한 가장 중요한 관건은 우식을 제거하고 남은 건전 치질 부위 와 수복된 복합레진의 색상이 얼마나 조화를 이루느냐에 있 다 [10][11][12] . 치아 표면은 다양한 광학적 특성을 나타낸다.…”

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Influence of the color of composite resins applied to lingual surface on the labial tooth color

Mun

Park

Cho

et al. 2009

J Korean Acad Conserv Dent

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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. [J Kor Acad Cons Dent 34(4): [309][310][311][312][313][314][315][316][317][318][319][320][321][322][323] 2009]

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An Analysis of Tooth Color

Cited by 52 publications

References 1 publication

Evaluation of Color Changes in the Vitapan Classical Shade Guide After Disinfection

Evaluation of Color Changes in the Vitapan Classical Shade Guide After Disinfection

Influence of the labial surface irregularity on the measurement of the tooth color by spectrometer

Influence of the color of composite resins applied to lingual surface on the labial tooth color

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