辽阳地区中青年恒前牙牙冠的颜色测量分析

Color Measurements and Analysis of the Anterior Teeth of Young and Middle-Aged People in Liaoyang

目的:测量辽阳地区中青年恒前牙牙冠不同部位间颜色差别,指导口腔美学修复中的比色、选色。方法:在统一标准(D65标准光源)下应用数码相机、计算机和相关软件,采用CIE-1976-L*a*b*色度系统对辽阳地区的142名中青年志愿者的852颗上颌恒前牙牙冠不同部位的颜色进行测量。结果:辽阳中青年上颌中切牙颈、中、切的L值分别为(72.57±6.34)、(74.52±5.60)、(67.29±6.08),侧切牙颈、中、切的L值分别为(66.86±6.50)、(69.44±8.62)、(63.12±7.01),尖牙颈、中、切的L值分别为(60.52±11.70)、(61.42±9.20)、(54.12±8.37)。结论:辽阳中青年恒上前牙牙色明度值从中切牙向尖牙逐渐降低,彩度逐渐增大;各个牙位不同部位色度值也不相同,其中中1/3的明度值最大、彩度值最小;颈1/3的明度值和彩度值均高于切1/3。

Objective：To study the color distribution of natural anterior teeth crowns of the young and middleaged in Liaoyang and to provide the information for color-matching in prosthetic dentistry.Methods：The study consisted of 142 people aged from 28 to 45years and born in Liaoyang.A total of 852 healthy anterior teeth were measured with a fiber-optical spectrophotometery system.Results：The L values of cervical,middle and incisal parts of upper center incisors were（72.57±6.34）,（74.52±5.60）and（67.29±6.08）,respectively.Those of the upper lateral incisors were（66.86±6.50）,（69.44±8.62）and（63.12±7.01）,respectively.Those of the upper canines were（60.52±11.70）,（61.42±9.20）and（54.12±8.37）,respectively.Conclusion：Among upper anterior teeth of young and middle-aged people in Liaoyang,the L values decreased from upper central incisor to cuspid teeth,but the a and b values increased.The colors in different areas of teeth were variable.In middle 1/3,the L values were the highest,but the a and b values were lower;the L,a and b values in cervical 1/3were higher than those in incisal 1/3.