摘要
目的:研究老年人上前牙的颜色特点。方法:采用ShadeEye-[2]NCC第2代电脑比色仪,检测137例老年人612颗活髓上前牙的L*、a*、b*值,与100例年轻人200颗活髓上前牙比较,应用SAS6.0软件包对数据进行t检验。结果:老年组上前牙色度值范围为中切牙L*:71.2±6.22,a*:-0.97±1.12,b*:15.9±5.04;侧切牙L*:69.6±5.52,a*:-0.6±1.18,b*:13.9±4.15;尖牙L*:68.4±5.99,a*:-0.15±1.02,b*:19.6±4.87。左右同名牙L*、a*、b*值差异无显著性(P>0.05);中切牙、侧切牙、尖牙之间两两比较,L*、a*、b*值均有显著差异(P<0.05)。中切牙L*值最大,侧切牙次之,尖牙最小;中切牙a*值最小,侧切牙次之,尖牙最大;侧切牙*b值最小,中切牙次之,尖牙最大。各牙位间的色差(△E),中切牙与侧切牙为2.945NBS,尖牙与中切牙为4.629NBS,尖牙与侧切牙为5.832NBS。青年组中切牙的L*、a*、b*的平均值分别为75.82、-0.11和12.68,尖牙的L*、a*、b*的平均值分别为72.07、1.22和17.92。老年组上前牙显示较小的L*值和a*值、较大的b*值(P<0.05)。结论:老年人上前牙颜色特点为,中切牙较侧切牙及尖牙明亮;侧切牙的色彩较中切牙及尖牙浅;尖牙较切牙偏红、偏黄。与青年组相比,老年人前牙显示的色度更暗,红色减少,黄色增加。
PURPOSE： To study the color distribution of the anterior teeth in elder people. METHODS： 612 anterior teeth from 137 people aging from 60 to 81 years and 200 anterior teeth from 100 young people aging from 20 to 40 years were collected. A digital colorimeter was used to measure the value of L^＊,a^＊,b^＊ of the teeth, and the chromatism （△E） was calculated according to the formula △E =（△L^＊2＋ △a^＊2＋ △b^＊2）^1/2 .All data were analyzed with SAS 6.12 software package for Student＇s t test. RESULTS： Totally, there were 612 vital anterior teeth from elder people, including 201 central incisors,199 lateral incisors and 212 canines, were collected. No difference was found between the teeth on the fight side and the left side in terms of L^＊,a^＊,b^＊value（P〉0.05）. The mean value of L^＊,a^＊,b^＊of the central incisors was 71.2±6.22,-0.97±1.12,15.9±5.04 ,respectively and that of the lateral incisors and the canines were 69.6±5.52,-0.6±1.18, 13.9±4.15 and 68.4±5.99,-0.15±1.02,19.6±4.87, respectively.The mean value of L^＊,a^＊,b^＊ of the central incisors and the canines from the youngster was 75.82,-0.11,12.68 and 72.07,1.22,17.92, respectively.There were significant differences between the central incisors and the lateral incisors as well as the canines （P〈0.05） in terms of L^＊ value. Meanwhile difference was also found among the incisors and the canines in terms of a^＊ and b^＊ value （P〈0.05）. The △E between the central incisors and the lateral incisors was 2.945NBS, and the value between the canines and the central incisors as well as the lateral incisors was 4.629NBS and 5.832NBS, respectively,indicating that the color difference could be perceived visually. Compared to the youngster, the teeth of the elder people demonstrated a lower L^＊ and a^＊ value, but a higher b^＊ value （P〈0.05）. CONCLUSIONS： Among elder people, the central incisors look much brighter than the lateral incisors and canines, while the canines have more redness and yellowness than the incisors, and the color of the lateral incisors exhibits lighter than the central incisors and the canines. Compared to the teeth from younger people, the teeth from elder people look much darker and yellower but less red. Supported by Shanghai Leading Academic Discipline Project （Grant No.T0202）.
出处
《上海口腔医学》
CAS
CSCD
2008年第3期300-303,共4页
Shanghai Journal of Stomatology
基金
上海市重点(特色)学科建设项目(T0202)~~
关键词
老年人
上前牙
色度学
Elder people
Anterior teeth
Color
