牙本质瓷颜色预测系统的临床应用初探  

Preliminary evaluation on self-developed dentin porcelain color prediction system

作　　者：陈立[1] 陆丞[1] 李晓利[2] 朱晓鸣[1] 张爽[2] 谭建国[1] 

机构地区：[1]北京大学口腔医学院·口腔医院修复科口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室,100081 [2]北京大学口腔医学院·口腔医院修复科口腔数字化医疗技术和材料国家工程实验室义齿加工中心,100081

出　　处：《中华口腔医学杂志》2016年第9期538-541,共4页Chinese Journal of Stomatology

基　　金：国家自然科学基金（81200805）

摘　　要：目的 探讨自主研发的牙本质瓷颜色预测系统应用于前牙金合金烤瓷冠配色中的准确性.方法 按标准纳入20颗上中切牙进行烤瓷冠修复,每颗中切牙制作3个金合金烤瓷冠.A组：技师根据修复医师视觉比色结果制作烤瓷冠;B组：技师根据比色仪测量结果制作烤瓷冠;C组：将比色仪测量的天然牙颈、中、切三部分明度（L＊值）、红绿色品（a＊值）、黄蓝色品（b＊值）输入自主研发的牙本质瓷颜色预测系统并预测牙本质瓷粉配方,技师用该配方瓷粉制作烤瓷冠.用比色仪测量3组烤瓷冠颈、中、切三部分L＊、a＊、b＊值,并分别与天然牙比较计算色差（△E）,使用单因素方差分析比较3组△E差异.结果 A、B、C组烤瓷冠中部与天然牙的△E分别为3.53±1.80、2.86±1.63、3.77±1.40（P＞0.05）;切端△E分别为2.70±1.13、2.80±0.90、3.04± 1.03 （P＞0.05）;而C组烤瓷冠颈部与天然牙的△E（3.92±1.34）显著大于B组（2.78±1.14）（P＜0.05）,A组（3.80±2.02）与B组、A组与C组△E差异均无统计学意义（P＞0.05）.结论 自主研发的牙本质瓷颜色预测系统用于烤瓷冠制作时,可达到与视觉比色法及仪器比色法类似的效果.Objective To apply the self-developed dentin porcelain color prediction system in the fabrication of porcelain-fused-to-metal-crown（PFMC）,and to evaluate its accuracy in color-matching.Methods Twenty upper central incisors were recruited according to preset criteria,and three PFMC were made for each tooth using three shade-matching techniques.Group A：PFMC were made according to the result of visual color selection;Group B：an spectrophotometer-based color-matching technique was used;Group C：PFMC were fabricated with dentin porcelain powder calculated by the prediction system according to the L＊,a＊,b＊ value measured by a spectrophotometer.Color differences（△E） （measured by spectrophotometer） of three groups of crowns were calculated in the cervical,middle,and incisal regions.The results were analyzed using one-way ANOVA.Results Mean color differences in body regions were：Group A：3.53± 1.80,Group B：2.86± 1.63,Group C：3.77± 1.40（P〉0.05）,and those in incisal regions were：Group A：2.70± 1.13,Group B：2.80±0.90,Group C：3.04± 1.03（P〉0.05）.In cervical region,Group C had greater color difference than Group B（2.78± 1.14）（P〈0.05）.Group A（3.80±2.02） and Group B,Group A and Group C had similar color difference（P〉0.05）.Conclusions PFMC fabricated using self-developed dentin porcelain color prediction system had similar color matching compared with conventional and instrument-based methods.

关 键 词：神经网络(计算机) 美学 牙科 陶瓷制品 

分 类 号：R783[医药卫生—口腔医学]