Meijering A C, Creugers N H, Mulder J, Roeters F J
Department of Oral Function and Prosthetic Dentistry, TRIKON: Institute for Dental Clinical Research, University of Nijmegen, The Netherlands.
J Dent. 1995 Feb;23(1):21-6. doi: 10.1016/0300-5712(95)90656-3.
In a longitudinal clinical trial the treatment times needed for the fabrication of veneer restorations (VRs) were recorded and analysed. Treatment times were determined for: (1) direct resin composite (DC), (2) indirect resin composite (IC) and (3) porcelain (P) veneer restorations and for two preparation designs, with and without incisal coverage. Significant effects on the treatment times were found for the factors: (1) type of VR, (2) operator, (3) number of VRs and (4) 'problems' in try-in phase for indirect VRs (IC- and P-VRs). The mean total time needed to perform one DC-VR was 46 min with a 95% confidence interval (c.i.) of 40-54 min, for one IC-VR 70 min (c.i. 60-82 min) and for one P-VR 62 min (c.i. 53-71 min). In the cases where more than one VRs were placed in one patient the times per VR were respectively: DC, 38 min (c.i. 34-44 min); IC, 59 min (c.i. 52-67 min); P, 49 min (c.i. 44-55 min). The results of this study are considered to be useful in further cost-benefit analyses.
在一项纵向临床试验中，记录并分析了制作贴面修复体（VR）所需的治疗时间。确定了以下治疗时间：（1）直接树脂复合材料（DC）、（2）间接树脂复合材料（IC）和（3）瓷（P）贴面修复体，以及两种预备设计（有和无切端覆盖）的治疗时间。发现以下因素对治疗时间有显著影响：（1）VR类型、（2）操作人员、（3）VR数量以及（4）间接VR（IC-VR和P-VR）试戴阶段的“问题”。制作一个DC-VR的平均总时间为46分钟，95%置信区间（c.i.）为40 - 54分钟；一个IC-VR为70分钟（c.i. 60 - 82分钟）；一个P-VR为62分钟（c.i. 53 - 71分钟）。在同一患者放置多个VR的情况下，每个VR的时间分别为：DC，38分钟（c.i. 34 - 44分钟）；IC，59分钟（c.i. 52 - 67分钟）；P，49分钟（c.i. 44 - 55分钟）。本研究结果被认为对进一步的成本效益分析有用。
