参考物体对部分无牙弧度数字植入物印记准确性的影响
Vygandas Rutkūnas1, Darius Jegelevičius1, Justinas Pletkus1
1Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.
The journal of advanced prosthodontics
|November 8, 2024
概括
添加参考对象 (RO) 对数字牙科扫描的准确性影响很小,在不同口腔内扫描仪 (IOS) 类型中观察到的差异. 扫描仪的性能在很大程度上是一致的,不管牙的面积大小.
科学领域:
- 数字牙科数字牙科
- 口腔植入物学口腔植入物学
- 生物医学成像技术 生物医学成像技术
背景情况:
- 准确的数字印记对于部分牙患者的假肢康复至关重要.
- 口腔内扫描仪 (IOS) 提供了一种非侵入性的方法来捕捉牙弧形几何.
- 补充参考对象 (RO) 对IOS准确性的影响需要进一步研究.
研究的目的:
- 为了评估额外的RO对距离和角度测量的真实性和精度的影响.
- 为了比较四个不同的IOS在部分无牙模型中的性能,具有不同程度的牙.
主要方法:
- 使用3D打印的部模型,缺少一个 (3-U) 和两个 (4-U) 的后牙.
- 四个IOS (Primescan,Trios 3,Trios 4,CS3600) 捕获了带有和没有额外RO的扫描.
- 扫描体之间的距离和角度测量被统计分析,以评估真实性和精度.
主要成果:
- 在所有模型和条件下,CS扫描仪始终显示出更高的距离值.
- 额外的RO通常不会显著影响距离测量,只有少数例外.
- CS扫描仪显示角度值增加,特别是当RO存在于4U和3U模型时.
结论:
- 额外的参考对象对口内扫描仪准确性的影响取决于扫描仪.
- 扫描仪的性能并没有受到牙的跨度长度的显著影响.
- 精度指标的变化强调了为特定临床应用选择扫描仪的重要性.
相关概念视频
02:46Uncertainty in Measurement: Reading Instruments
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
01:44Rules for Significant Figures
In any measurement, the precision of the measuring tool is an essential factor. An ordinary ruler, for example, can measure length to the closest millimeter; a caliper, on the other hand, can measure length to the nearest 0.01 mm. As a result, the caliper is a more precise measurement tool because it can measure extremely minute changes in length. The measurements will be more accurate if the measuring tool is more precise.
It should be emphasized that when we represent measured values, the...
It should be emphasized that when we represent measured values, the...