论文部分内容阅读
目的研究Cerec inlab MC XL系统光学成像粉对数字化模型精度的影响。方法制备一标准右上第一磨牙全冠预备体模型,并复制8个石膏扫描代型。每个代型采用inEos扫描单元获取喷粉前后的数字化模型,采用inlab3.65软件测量每个数字化模型边缘、肩台、轴面、窝沟、牙尖区域喷粉前后的变化情况。最后采用SAS软件对实验数据进行统计分析。结果数字化模型各区域1周前后的测量值无统计学差异(P>0.05);喷粉后的数字化模型质量较喷粉前好,光学成像粉对数字化模型边缘、肩台、轴面、窝沟、牙尖区域的影响值分别为(0.073±0.042)、(0.106±0.077)、(0.044±0.025)、(0.128±0.060)、(0.102±0.056)mm,各区域影响值比较差异显著(P<0.01)。结论光学成像粉对全冠数字化模型各区域的影响是不同的,对面和肩台的影响大于边缘和轴面,提示不同区域喷粉时要区别对待。
Objective To study the effect of optical imaging powder of Cerec inlab MC XL on the accuracy of digital model. Methods A standard upper right first molar full crown prepared body model was prepared and 8 gypsum scans were replicated. For each generation, the inEOS scanning unit was used to obtain the digitized model before and after dusting. Inlab3.65 software was used to measure the changes before and after the dusting of each digitized model edge, shoulder, axial, fissure, and cusp region. Finally, SAS software was used to analyze the experimental data. Results There was no statistical difference in the digital model before and after 1 week (P> 0.05). The quality of the digitized model after duster was better than that before doping. The optical imaging powder had no significant difference on the edge, shoulder, (0.073 ± 0.042), (0.06 ± 0.077), (0.044 ± 0.025), (0.128 ± 0.060) and (0.102 ± 0.056) mm respectively in the cusp region, and there was significant difference in the influence value of each region (P < 0.01). Conclusion The effects of optical imaging powder on the whole digital model are different, and the influence on the surface and the shoulder is greater than that on the edge and the axial surface, which indicates that different areas should be treated differently when they are dusted.