汉族青年人群前牙色度分析的临床研究

The color charactor of the anterior teeth of young people in Chinese Hans population

目的:研究汉族青年人群前牙颜色特征。方法:使用OLYMPUS Crystaleye电脑比色仪测量148例18-35岁汉族青年共1769颗上下颌前牙颈、体、切端的L*、a*、b*值,使用SPSS 19.0进行统计分析(t检验和单因素方差分析)。结果:①青年人群前牙的牙颈部色度范围为L*:70.96±3.05,a*:4.19±1.30,b*:21.10±3.52;体部色度范围为L*:71.63±3.21,a*:2.13±1.30,b*:19.43±3.99;切端色度范围为L*:68.08±2.91,a*:1.25±1.23,b*:15.89±3.71。前牙颈部、体部、切端两两比较L*、a*、b*值均有统计学差异(P<0.05)。②中切牙、侧切牙、尖牙三者间颈、体、切部的L*、a*、b*值比较均有统计学差异(P<0.05)。③左右同名牙之间,其颈、体、切部的L*、a*、b*值差异无统计学意义(P>0.05)。上下颌之间同名牙颈、体、切部的色度值进行比较时,除中切牙体部L*值、切端L*值、侧切牙颈部a*值、切端a*值、切端b*值、尖牙颈部b*值、切端b*值之间无显著性差异外,其余差异均有统计学意义(P<0.05)。结论:汉族青年人群前牙并非均一颜色,比色时应注意颈、体、切分区比色,并注意不同牙位的差异性。

Objective： To study the color character of the anterior teeth of young people in Chinese Hans population. Methods： In total,1769 anterior teeth of 132 young people aging from 20 to 35 years old 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＊a＊b＊）= [（ △L＊）~2＋（ △a＊）~2＋（ △b＊）2]^（1 /2）. Data were analyzed with SPSS 19. 0 software package for Student＇sttest and one-way ANOVA. Results： ①The mean value of L＊a＊b＊of anterior teeth was： cervical region： L＊： 70. 96 ± 3. 05,a＊：4. 19 ± 1. 30,b＊： 1. 10 ± 3. 52; body region： L＊： 71. 63 ± 3. 21,a＊： 2. 13 ± 1. 30,b＊： 19. 43 ± 3. 99; incisal region： L＊： 68. 08 ±2. 91,a＊： 1. 25 ± 1. 23,b＊： 15. 89 ± 3. 71.②There were statistically significant differences between the central incisors and the lateral incisors as well as the canines in terms of L＊a＊b＊. Meanwhile the difference was also found among the L＊a＊b＊value of cervical,body and incisal regions. ③No difference was found between the teeth of same position on the left side and the right side in terms of L＊,a＊,b＊value（ P 0. 05）. Respectively,difference was found between the maxillary and mandibular teeth. Conclusion： The difference among cervical,body and incisal regions,as well as the influence of teeth positon,should be considered while doing shade match in clinic.