Color and translucency of enamel in vital maxillary central incisors.
Color and translucency of enamel in vital maxillary central incisors.
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重要的上颌中切牙牙釉质的颜色和半透明度。
DOI：
10.1016/j.prosdent.2022.01.010
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发表时间：
2023-12
影响因子：
4.6
通讯作者：
Johnston, William M.
中科院分区：
文献类型：
--
作者：
Wee, Alvin G.;Winkelmann, Damian A.;Gozalo, David J.;Ito, Masayasu;Johnston, William M.
有限的数据，特别是在体内的数据，存在有关的重要的前牙未修复的牙列的不透明性参数（TP）值。此外，缺乏有关理论无限厚度下重要牙釉质的CIELab值的已发表信息。在种族、年龄和性别不同的人群中获得TP和CIELab值将有助于告知美学牙科修复的发展和放置，从而更准确地捕获釉质的复杂光学特性。本临床研究的目的是在不同年龄、种族和性别的参与者中，在理论无限厚度下，研究活体前切牙釉质的TP和CIELab值。光谱反射率测量（380至780 nm，2 nm的间隔）的中切区的重要的，未恢复的上颌前牙，在120名参与者，平均分为2个性别，4个种族或民族群体，和5个年龄范围。定向仪器以实现0度观察和45度照明，并在白色和黑色硅胶背景下进行光谱测量。使用黑色和白色硅酮背衬的切牙釉质的反射光谱来拟合Kubelka-Munk（K-M）反射理论。CIEDE 2000色差公式用于确定TP，并在参与者人口统计学中比较数据。采用D 65照明和CIE标准人（2度）观察者，计算了无限厚度牙釉质的CIELab色坐标值。为了确定参与者组之间的值范围和显著差异，采用4因素ANOVA分析CIELab值，并采用广义线性混合模型分析TP值。用Bonferroni校正的Student t检验评价感兴趣的成对比较。上颌中切牙釉质的平均TP为10.1 ±3.6，CIELab色坐标为L*=73.5 ±7.6，a*=2.2 ±1.8，B*=11.9 ±8.4。切牙釉质的TP值在特定年龄和种族组之间存在显著差异，年龄和性别（P=.009）以及种族和年龄（P=.042）之间存在显著相互作用。在具有相同性别和种族的不同年龄组之间的L* 坐标中发现了无限厚度的釉质的CIE颜色坐标，特别是当比较CIELab方向与年龄的人群特征（P=.011）以及年龄、性别和种族之间的相互作用（P=.035）时。在体内L* 值和TP值的切牙釉质不同种族，年龄和性别确定的组之间的显着差异。
Limited data, especially in vivo data, exist regarding translucency parameter (TP) values for vital anterior nonrestored dentition. Additionally, published information on the CIELab values of vital enamel at a theoretical infinite thickness is lacking. Obtaining TP and CIELab values in a population that varies in terms of ethnicity, age, and sex would be useful to inform the development and placement of esthetic dental restorations that more accurately capture the complex optical qualities of enamel. The purpose of this clinical study was to investigate in vivo the TP and CIELab values of vital anterior incisor enamel at a theoretical infinite thickness in a diverse pool of participants who varied in age, ethnicity, and sex. Spectral reflectance measurements (380 to 780 nm at 2-nm intervals) of the mid-incisal region of vital, unrestored maxillary anterior teeth were made in 120 participants, equally divided into 2 sexes, 4 racial or ethnic groups, and 5 age ranges. Instruments were oriented to achieve 0-degree observation and 45-degree illumination, and spectral measurements were made with white and black silicone backgrounds. Reflectance spectra of the incisal enamel from both the black and white silicone backing were used to fit to Kubelka-Munk (K-M) reflectance theory. The CIEDE2000 color difference formula was used to determine TP, and data were compared among participant demographics. CIELab color coordinate values for enamel at an infinite thickness were calculated by using D65 illumination and CIE standard human (2-degree) observer. To determine value ranges and significant differences among participant groups, CIELab values were analyzed with a 4-way ANOVA, and TP values were analyzed with a generalized linear mixed model. Pairwise comparisons of interest were evaluated with Bonferroni-corrected Student t tests. For maxillary central incisor enamel, the average TP was 10.1 ±3.6, and the average CIELab color coordinates were L*=73.5 ±7.6, a*=2.2 ±1.8, b*=11.9 ±8.4. TP values of incisal enamel significantly differed among specific age and ethnic groups, with general significant interactions of age and sex (P=.009), as well as ethnicity and age (P=.042). CIE color coordinates of enamel at an infinite thickness were found in the L* coordinate between different age groups with the same sex and ethnicity, specifically when comparing CIELab direction with the population characteristics of age (P=.011) and the interaction between age, sex, and ethnicity (P=.035). In vivo L* values and TP values of incisal enamel differed significantly among groups determined by ethnicity, age, and sex.
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DOI：
10.5395/rde.2016.41.3.159
发表时间：
2016-08-01
期刊：
Restorative dentistry & endodontics
影响因子：
--
作者：
Lee, Yong-Keun
通讯作者：
Lee, Yong-Keun
影响因子：
4.6
作者：
Hasegawa, A;Ikeda, I;Kawaguchi, S
通讯作者：
Kawaguchi, S
影响因子：
4.4
作者：
Mayoral, Juan R.;Arocha, Mariana A.;Ardu, Stefano
通讯作者：
Ardu, Stefano
影响因子：
7.6
作者：
Hu, X.;Johnston, W. M.;Seghi, R. R.
通讯作者：
Seghi, R. R.
影响因子：
5
作者：
Mikhail, Sarah S.;Azer, Shereen S.;Johnston, William M.
通讯作者：
Johnston, William M.