Meijering A C, Roeters F J, Mulder J, Creugers N H
Department of Oral Function and Prosthetic Dentistry, TRIKON, Institute for Dental Clinical Research, University of Nijmegen, the Netherlands.
J Oral Rehabil. 1997 Jul;24(7):506-11. doi: 10.1046/j.1365-2842.1997.00525.x.
Three types of veneer restorations (VRs) were evaluated for recognition by two groups of observers to study the aesthetic result. The different types of VRs were: porcelain, direct resin composite and indirect resin composite. One month after insertion of the VRs, colour transparencies were made of smiling patients randomly selected from a group of 112 patients participating in a clinical trial. The slides were evaluated by five dentists who were not familiar with the patients and by 25 beautician students (BS). Dentists were asked to locate the VRs which were present in the patients and to specify the type of VR. BS were only asked to locate the VRs. To trace a possible relationship between the aesthetic result of the treatment and a number of variables, ANOVA was applied to evaluate the variables: 'discolouration of the teeth' before treatment, 'type of VR' and 'number of VRs'. Agreements in judgement were expressed in Cohen-Kappa coefficients. The results showed that the dentists could locate the VRs quite well (Kappa coefficient 0.64 +/- 0.28) but for BS this was lower (Kappa coefficient 0.43 +/- 0.27). The more VRs were made in one patient, the more difficult it was to locate them correctly. The other variables had no significant effect on the recognition of the VRs. It was not possible for the dentist observers to differentiate between the types of VRs.
为研究美学效果，对两组观察者识别三种类型的贴面修复体（VR）进行了评估。不同类型的VR包括：瓷贴面、直接树脂复合材料贴面和间接树脂复合材料贴面。在植入VR一个月后，从参与一项临床试验的112名患者中随机选取微笑患者制作彩色透明片。这些幻灯片由五名不熟悉这些患者的牙医和25名美容专业学生（BS）进行评估。要求牙医找出患者口中存在的VR，并指明VR的类型。只要求BS找出VR。为探究治疗美学效果与若干变量之间的可能关系，应用方差分析来评估以下变量：治疗前“牙齿变色”、“VR类型”和“VR数量”。判断的一致性用科恩卡方系数表示。结果表明，牙医能够较好地找出VR（卡方系数0.64±0.28），但对于BS来说这一系数较低（卡方系数0.43±0.27）。一名患者制作的VR越多，正确找出它们就越困难。其他变量对VR的识别没有显著影响。牙医观察者无法区分VR的类型。
