牙科分光光度计用于测量上颌前牙牙龈颜色的精确性及准确性  

Precision and accuracy of a dental spectrophotometer in gingival color measurement of maxillry anterior gingival

作　　者：杜阳[1] 谭建国[1] 陈立[1] 王芳萍[1] 谭瑶[1] 周剑锋[1] 

机构地区：[1]北京大学口腔医学院·口腔医院修复科,北京100081

出　　处：《北京大学学报（医学版）》2012年第4期622-627,共6页Journal of Peking University:Health Sciences

摘　　要：目的:研究应用牙科分光光度计测量牙龈组织比色的精确性及准确性。方法:将牙科分光光度计Crystal-eye(Olympus Inc,Tokyo,Japan)的天然牙咬合定位板进行改良,并辅以遮光罩获取牙龈图像。精确性试验中,2名实验者对5名被试共计20个牙位的上颌前牙区进行测色,采用国际照明委员会(Commission Internationale de I’Eclairage,CIE)1976 L*a*b*色度系统,获取附着龈、游离龈、近中龈乳头CIE L*a*b*值,并计算各测量值与平均值的平均差值。准确性试验中,1名实验者对6名被试共计24个牙位上颌前牙区的附着龈进行测色,获取附着龈的CIE L*a*b*值,以分光光度计PR715(SpectraScan;PhotoResearch,Inc.,California,USA)所测数值为金标准计算与各测量值的平均差值。结果:精确性的平均L*差值(平均d L*)在(0.28±0.16)至(0.78±0.57)之间,平均a*差值(平均d a*)及平均b*(平均d b*)差值分别在(0.28±0.15)至(0.87±0.65),(0.19±0.09)至(0.58±0.78)之间,平均色差值在(0.62±0.17)至(1.25±0.98)之间,总平均色差值为(0.90±0.18);准确性的平均d L*在(0.58±0.50)至(2.22±1.89)之间,平均d a*及平均d b*分别在(1.03±0.67)至(2.99±1.32),(0.68±0.78)至(1.26±0.83)之间,平均色差值在(2.44±0.82)至(3.51±1.03)之间,总平均色差值为(2.96±1.08)。结论:经过适当的仪器改良,Crystaleye用于测量上颌前牙区牙龈组织颜色产生的不稳定性相对较低,是测量牙龈颜色的可行仪器。Objective：To explore a gingival shade matching method and to evaluate the presicion and accuracy of a dental spectrophotometer modified to be used in gingival color measurement. Methods： Crystaleye, a dental spectrophotometer （Olympus, Tokyo, Japan） with a custom shading cover was tested. For precision assessment, two experienced experimenters measured anterior maxillary incisors five times for each tooth. A total of 20 healthy gingival sites （attached gingiva, free gingiva and medial gingival papilla in anterior maxillary region） were measured, the Commission Internationale de I＇ Eclairage （CIE） color parameters （ CIE L ＊ a ＊ b ＊ ） of which were analyzed using the supporting software. For accuracy assessment, a rectangular area of approximately 3 mm × 3 mm was chosen in the attached gingival portion for spectral analysis. PR715 （ SpectraScan ; Photo Research Inc. , California, USA）, a spectroradiometer, was utilized as standard control. Average color differences （△E） between the values from PR715 and Crystaleye were calculated. Results： In precision assessment,△L ＊ between the values in all the test sites and average values were from（0.28 ±0.16）to（0.78 ±0.57）,with △a ＊ and △b ＊ from （0.28 ± 0.15 ）to （0.87 ± 0.65 ）, from（0.19 ± 0.09 ）to （ 0.58 ± 0.78 ）, respectively. Average AE between values in all test sites and average values were from （0.62 ± 0.17） to （1.25 ± 0.98） CIELAB units, with a total average △E（0.90 ± 0.18）. In accuracy assessment, △L ＊ with control device were from（0.58 ± 0.50 ） to （ 2.22 ± 1.89 ）, with △a ＊ and △b ＊ from （ 1.03 ± 0.67 ） to （ 2.99 ± 1.32 ）, from （0.68 ± 0.78 ） to （ 1.26 ± 0.83 ）, respectively. Average AE with the control device were from （ 2.44 ± 0.82） to （3.51 ± 1.03 ） CIELAB units, with a total average △E （2.96 ±1.08 ）. Conclusion： With appropriate modification, Crystaleye, the spectrophotometer, has demonstrated relative m

关 键 词：牙龈 色 分光光度法 

分 类 号：R781[医药卫生—口腔医学]