摘要
目的通过测量天然牙的色度参数范围，并与三种常用比色板的色度参数范围进行比较，分析目前常用的牙科比色板存在的局限。方法使用数码照相机在D65光源的非球形漫射照明观测方式下拍摄比色板A（VITAPAN Classic）、B（VINTAGE Halo）、C（3D-MASTER）和上颌天然中切牙322颗，获得天然牙和3种比色板的色度参数范围并进行比较。结果天然牙色度参数95％正常值的范围分别如下：明度（L^＊）为61．631～73．250，红绿色品（±a^＋）为-0．719～1．879，黄蓝色品（±b^＊）为8．701～17．790。与天然牙相比，比色板A的色度参数范围较窄，缺少红色品与高明度色片，饱和度分布不均匀；比色板B的红色品范围较A有所扩大，但饱和度偏高；比色板c的色度参数范围最大，其饱和度和明度可完全覆盖天然牙相应的色度参数范围，但仍缺乏红色品色片。结论与本组天然牙的颜色范围相比，目前临床常用比色板存在覆盖不全和色片分布不均匀的局限，总体缺乏偏红色调色片。
Objective To analyze the limitation of currently used shade guide systems comparing with color range of nature teeth. Methods Digital pictures of shade guide systems A （VITAPAN Classic）, B（VINTAGE Halo）, C（3D-MASTER）, and 322 central incisors were taken under the same condition as light source of D65 with the observation method of d/0°. The data obtained from nature tooth color were compared with the color range of three shade guide systems mentioned above in items of L^＊ a^＊ b^＊/C^＊ H^0. Results The normal chroma value （ 95% ） of the natural teeth were L 61. 631-73. 250, a^＊- 0. 719- 1. 879,and b^＊ 8.701-17.790. Natural tooth colors were different from those of the shade guide system A which color range was narrower, short of red hue, higher values, and unevenly distribution of saturation. On the other hand, the range of red hue increased in shade guide system B while its saturation was slightly high. The color range of shade guide system C was greatest among the three shade guide systems. The saturation and value of shade guide system C covered all varieties of nature teeth measured in this research, but it still lacked red hue comparing to the nature teeth. Conclusions Comparing the color range of nature teeth, the shade guide systems used in clinic have uneven hue distribution and cannot cover all colors of nature teeth. Generally, all the shade guide systems are lack of the hues which are named under the category of red tone.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2008年第7期422-425,共4页
Chinese Journal of Stomatology
基金
上海市重点学科（特色学科）建设项目（T0202）
关键词
切牙
比色板
色度参数
Incisor
Shade guide
Color parameters
