不同角度对X-Rite’s Shade Vision系统测量结果的影响  

Effects of angle deviations on X-Rite's shadeVision system CIELAB measurements

作　　者：林芝[1] 张秀华[1] 刘丽[2] 朱形好[1] 郑顺友[1] Y.LI 

机构地区：[1]温州医学院附属第一医院口腔科 [2]浙江大学医学院附属口腔医院修复科 [3]LomaLinda Uni-versity Loma Linda CA,USA 92350

出　　处：《口腔医学》2006年第5期363-367,共5页Stomatology

摘　　要：目的观察不同角度对X-Rite’s ShadeVision系统测量比色板结果的影响。方法将一副新的Vita16色比色板固定在粉红色的蜡中。X-Rite’s ShadeVision系统分别在平行于比色板唇面,5°、10°、15°向左右侧和切向、龈向倾斜时测量颜色,以L*,a*,b*及Vita16色比色板色片颜色表示测量结果。计算ΔL,Δa,Δb和ΔE*ab,数据用单因素方差分析。结果向右倾斜5°、10°、15°时L*值分别减少0.22,0.97和0.93,而向左倾斜L*增加;垂直向角度改变时,L*值增加;最大的ΔL值在向龈向倾斜15°(2.84)和向切向倾斜15°(2.37),这导致相应位置出现最大的ΔE*ab(3.22±0.37)和(2.50±0.63),15°向左和右倾斜时,ΔE*ab分别为1.87±0.59和1.20±0.25。与其他位置比较,向龈向和切向15°时,ΔE*ab明显高(P<0.05)。结论X-Rite’sShadeVision测量时,正确的测量位置对获得准确的测量结果非常重要,角度的偏移,尤其是垂直向的倾斜会影响测量结果。Objective To investigate the effects of angle deviations on X-Rite＇ s ShadeVision measurements of Vitapan Classical shade tabs. Methods A new set of Vitapan Classical shade guide （Bad Sackingen, Germany） tabs were embedded in pink denture resin. Angle guide devices were fabricated so that the measuring tip of X-Rite＇s ShadeVision （Michigan, USA） would be placed at thirteen defined angles, including parallel to horizontal plane as the desired measurement, and 5°, 10° or 15° incisal, gingival, left or right （5°, 10° or 15° incisal, gingival, left or right inclination from the facial horizontal plane）. Three CIELAB measurements were made for each set-up. The delta L^＊ , delta a^＊ , delta b^＊ and delta Eab values were calculated. The data were analyzed using the One-Way ANOVA and Student-Newman-keuls multiple comparison methods. Results The L^＊ values were reduced at 0.22, 0.97 and 0.93 for left inclination of 5°, 10° or 15°, respectively, while they increased when the right side of the tip formed an angle. Angle deviations in either the ineisal or gingival sites also increased the L^＊ values. As expected, the greatest delta L^＊ values were detected at 15° incisal （2.84） and gingival （2.37） deviations, which also resulted in the greatest delta E^＊ ab values （3.22 ±0.37 and 2.50 ± 0.63 for the 15° incisal and gingival, respectively）. The delta Eab values of 15° right and left angle deviations were 1.87 ± 0.59 and 1.20 ± 0.25, respectively. Data analyses showed that, compared with other deviations, the delta E^＊ ab values of 15° ineisal and gingival were significant higher （P 〈 0.05） and they were also significantly different from each other （ P 〈 0.05）. Conclusion Proper positioning of X-Rite＇s ShadeVision measuring tip is critical to obtain correct tooth color measurement, and angle deviations, particularly on the incisal and gingival sides, with need to be adequately controlled during the measurement.

关 键 词：X—Rite’s ShadeVision系统 测量 比色板 

分 类 号：R783.3[医药卫生—口腔医学]