比色板与电脑比色仪比色准确性的分析

目的 通过分析比色板与电脑比色仪比色的准确性,探讨电脑比色仪对比色板色标未能覆盖颜色的精确表达作用.方法 选取天然牙颜色分布相对均一的单颗前牙全瓷冠修复患者120例,按照随机数字表分为两组(V组和S组),每组60例.V组采用比色板,S组采用电脑比色仪,对患者的天然牙进行比色;再根据测色结果分为色标颜色组(V1、S1)和中间颜色组(V2、S2).修复后使用电脑比色仪对所有修复体及V组比色参照的天然牙进行测色,分别计算每组修复体中部与天然牙中部的总色差△E*ab,对结果进行配对t检验.结果 V组△E*ab(3.92±1.59)与S组△E*ab(2.23±0.96)的差异有统计学意义(P＜0.01);V1组△E*ab(2.29±0.88)与V2组△E*ab(4.42±1.42)的差异有统计学意义(P＜0.01);S1组△E*ab(2.12±0.84)与S2组△E*ab(2.27±1.01)的差异无统计意义(P=0.014).V2组AE*ab与S2组△E*ab的差异有统计学意义(P＜0.01);V1组△E*ab与S1组△E*ab的差异无统计学意义(P=0.698).结论 对于比色板色标未能覆盖的颜色,电脑比色仪的定位与表达比单纯用比色板比色更准确,利于指导修复体的颜色再现.     

自制四环素牙比色板的临床应用初探

目的 通过比较普通比色板和自制四环素牙比色板对四环素牙比色后制作的修复体与天然牙的颜色差异,探讨四环素牙比色板的实用性,以期为其临床应用提供参考.方法 对42例四环素牙患者的53颗牙行镍铬合金基底烤瓷冠修复,分别使用19色比色板(Shofu)和自制四环素牙比色板进行比色,设计两套配色方案,制作两组修复体(A组和B组).使用ShadeEye NCC比色仪测量,计算两组修复体与天然牙的色差.同时请医师与患者对两组修复体进行主观评价.结果 使用四环素牙比色板比色后制作的修复体(B组)与天然牙的色差为(7.80±4.70),使用19色比色板比色后制作的修复体(A组)与天然牙的色差为(10.68±4.70),两组差异有统计学意义(t=7.328,P＜0.001).医师和患者对B组修复体的主观评价均优于A组.结论 四环素牙比色板可为四环素牙的颜色再现提供有益的参照,是对临床19色比色板的补充.     

口腔临床修复比色技术研究进展

修复体与天然牙颜色的协调程度直接关系到最终的修复效果,比色是美学修复中颜色再现或复制的一个重要步骤。口腔比色涉及到天然牙色、照明条件、比色技术、对比效应和观察者多个环节,只有对各个因素进行深入了解,才能保证临床比色的准确性。笔者总结现阶段比较常用的比色方法,针对常用的比色板以及比色仪器的优缺点、比色技术的发展现状作一综述,为改进临床比色质量提供参考。     

比色板标准与非标准色标识别差异的初探

目的 测试口腔修复学专业研究生对比色板标准色标与非标准色标颜色识别的差异,评价、分析口腔修复学专业研究生临床实际比色能力,为探讨临床比色教学方法提供客观的基础数据.方法 选择具有1～5年临床工作经验、排除色觉识别障碍、经过色彩学知识培训的口腔修复学专业研究生62名.从比色板A(Lineargnide)的29个标准色标中通过随机数字表抽取7个色标作为标准色标,以比色板B(Vita Bleachadgnide 3D-Master)中的7个色标作为非标准色标,在D55标准光源下,以比色板C(Vita 3D-Master)作为比色工具,对标准色标和非标准色标进行比色测试.计算受试者对两种色标比色的总体准确率;统计比色正确的人数分布,并进行Monte Carlo确切概率法检验;统计比色结果在明度、饱和度、色相上的等级偏差,并进行Wilcoxin符号秩和检验.结果 受试者对标准色标比色的总体正确率为45.9%(199/434),对非标准色标比色的总体正确率为9.0%(39/434);对两种色标比色正确的人数分布的差异有统计学意义(P<0.001);对两种色标比色结果的明度等级偏差[分别为0.2(0.1～0.3)、0.4(0.4～0.5)]、饱和度等级偏差[分别为0.2(0.1～0.4)、0.5(0.4～0.6)]的差异均有统计学意义(P<0.01),色相等级偏差[分别为0.3(0.1～0.4)、0.3(0.1～0.4)]的差异无统计学意义(P=0.079>0.01).结论 口腔修复学专业研究生对比色板非标准色标颜色的识别能力明显低于对标准色标颜色的识别能力.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

新型NCC比色板在重新比色中的临床应用研究

目的评价新型NCC比色板在牙科重新比色中的临床效果。方法采用经传统Vita比色板比色失败的168例、208个单位瓷修复体随机分成两组,一组用Vita3D比色板重新比色、配色,重新制作。另一组采用新型SHOFUNCC比色板重新比色、配色,重新制作,比较两组的比色效果。结果NCC比色板组的满意率为92．86％,与对照组相比有显著性差异（P〈0．05）。结论新型NCC比色板颜色较宽,临床比色可取得较好效果。     

口腔医学专业不同训练层次人员牙比色能力的初步调查

目的:使用牙比色训练箱(TTB)对口腔专业不同训练层次操作者的比色能力进行检测,以了解他们比色能力的差异,为医学美容课程设置提供依据。方法: 选取排除色觉障碍的口腔医学本科学生、口腔修复工艺(专科)学生、牙科加工中心技师各20名,分别以TTB比色测试模式随机抽取的15个比色标准色标进行测试,使用SPSS17.0软件包统计分析上述3组不同训练层次人员的比色成绩的差异。结果:口腔本科生、口腔修复工艺学生与牙科加工中心技师比色成绩分别是834.04±51.66、859.40±53.31和888.36±48.54;口腔本科生和口腔修复工艺学生之间无显著差异(P>0.05),而牙科技师显著高于口腔修复工艺学生(P<0.05)和口腔本科生(P<0.01)。结论:经过TTB比色测试,不同训练层次人员的牙比色成绩有显著差异。     

人工牙龈比色板对视觉比色结果的影响

目的通过分析使用带有或不带有人工牙龈的比色板比色准确率，判断人工牙龈对视觉比色的影响。方法首先用测色加视觉的方法筛选出颜色最接近之色标配成实验用比色板，选出7个色标并遮盖色标号作为比色目标，5年以上修复临床经验医师10人为受试者，在统一条件下对7个比色目标进行3组视觉比色，分别为比色目标与比色板均不使用人工牙龈（简称A组），仅比色目标有人工牙龈（简称B组），比色目标与比色板均使用人工牙龈（简称C组）。分别记录比色结果正误数量并计算正确率。结果经统计检验B组与A组、B组与C组之间都有极显著性差异（P〈0．01），A组与C组之间则无显著性差异（P〉0．05），即在比色目标有人工牙龈情况下，使用配有人工牙龈的色标时比色正确率远高于不使用人工牙龈的色标。结论使用人工牙龈有利于临床上取得正确比色结果，它可以通过部分弥补了牙龈与牙齿颜色的反差对比、使色标更能反映就位后的最终颜色、去除干扰等发挥作用。     

电脑比配色仪与比色板之间的相近性分析

目的：通过对比色记录的分析，比较Vita比色板、松风Vintage Halo比色板和电脑比配色仪之间的相近性和差异性。方法：随机抽取100名年龄在21～24岁的本地在校大学生，由男女两位测试者使用电脑比配色仪、Vita比色板和松风Vintage Halo比色板对被测试者的左上中切牙进行比色分析。结果：三种比色方法均以A色调最为集中，占总数的55％以上。其次是D色调占总数20％以上。男女测试者的选色在A、R、VR．系列中无明显差异。结论：电脑比配色仪、Vita比色板、松风Vintage Halo比色板均不能完全覆盖本地区青年天然中切牙的色度特征，只在A色调系列中重复率较高。     

三种牙科比色板与天然牙色度的比较分析

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.     

Ivoclar—Vivadent Chromascop比色板色度学分析

目的：研究分析Ivoclar-Vivadent Chromascop比色板色度学,方法：选用CIE1976L*a*b*颜色系统,按照JISZ8722标准,用数码相机和计算机技术,在标准光源下采集,测试,分析Ivoclar-Vivadent Chromascop比色板各区域的色度值,结果：Ivoclar-Vicadent Chromascop比色板颈部,中部,切端部色度值不一样,比色板色度值范围是：L：60．7－84．3：a*:-3.0-7.0,b:9.0-28.0。结论： Ivoclar-Vivadent Chromascop 比色板颜色分布具有一定规律性,数码相机和计算机技术是牙冠色彩研究的一种新手段,值得进一步推广运用。     

有关四环素牙比色板的初步研究

为解决四环素牙患者固定义齿修复中的比色配色问题,作者选取一定的Vita瓷粉混合,模拟四环素牙色,制作一定数量的金瓷比色片;经仪器测色、分组后与四环素牙的中1/3比色,从中筛选出16个比色片;形成一套四环素牙比色板。结果表明:自制比色板的颜色较国人正常牙色灰暗、色调偏红褐,与105例四环素牙的临床比色相符,可供临床使用。