PDF(Pubmed)
Abstract：
(1) Background: Intraoral scanners undergo rapid advancements in hardware and software, prompting frequent updates by manufacturers. (2) Aim: This study aimed to quantitatively assess the precision of full dental arch digital impressions obtained from four different intraoral scanners: Trios 5-3SHAPE, Copenhagen, Denmark, CEREC Primescan- Dentsply Sirona, New York, NY, USA, Planmeca Emerald S-Planmeca Oy, Helsinki, Finland, and Medit i700-Medit Corp, Seoul, Republic of Korea. (3) Methods: A maxillary virtual dental model (digital master model) was created in accordance with ISO standard 20896-1. Subsequently, a 3D-printed model was obtained from the master model\'s STL file and scanned 15 times consecutively with each scanner. STL files were aligned with the master model\'s STL using Medit Link-Medit Design software v.3.1.0. The accuracy was evaluated by measuring deviations in micrometers between each scanner\'s scans and the master model. (4) Results: The study revealed variations in accuracy ranging from 23 to 32 µm across scans of the same dental arch, irrespective of the scanner used and scanning strategy employed. The anterior regions exhibited higher precision (Mean Absolute Deviation of 112 µm) compared to the posterior regions (Mean Absolute Deviation of 127 µm). Trios 5 demonstrated the smallest deviation (average 112 µm), indicating superior accuracy among the scanners tested. Emerald S and Medit i700 exhibited balanced performance (average 117 µm and 114 µm, respectively), while Primescan consistently displayed high deviation (average 127 µm). (5) Conclusions: Based on clinically accepted thresholds for accuracy in intraoral scanning, which are typically 200 µm for full arch scans, Trios 5 surpasses these benchmarks with its average deviation falling within the 200 µm range. Emerald S and Medit i700 also meet these standards, while Primescan, although showing high overall deviation, approaches the upper limit of clinical acceptability. Considering the limitations of an in vitro investigation, the findings demonstrate that each intraoral scanner under evaluation is capable of reliably and consistently capturing a full arch scan for dentate patients.
摘要：
（1）背景：口内扫描仪在硬件和软件方面迅速发展，促使制造商经常更新。（2）目的：本研究旨在定量评估从四种不同的口内扫描仪获得的完整牙弓数字印模的精度：Trios5-3SHAPE，哥本哈根,丹麦,CERECPrimescan-DentsplySirona,纽约,NY,美国,PlanmecaEmeraldS-PlanmecaOy,赫尔辛基,芬兰,和mediti700-medit公司，首尔,大韩民国。(3)方法:根据ISO标准20896-1创建上颌虚拟牙模型(数字主模型)。随后，从主模型的STL文件中获得3D打印模型，并使用每个扫描仪连续扫描15次。使用MeditLink-MeditDesign软件v.3.1.0将STL文件与主模型的STL对齐。通过测量每个扫描仪的扫描和主模型之间的微米偏差来评估精度。（4）结果：研究显示，同一牙弓的扫描精度变化范围为23至32µm，无论使用的扫描仪和采用的扫描策略。与后部区域（平均绝对偏差127µm）相比，前部区域表现出更高的精度（平均绝对偏差112µm）。Trios5显示出最小的偏差（平均112µm），表明在测试的扫描仪中具有较高的准确性。EmeraldS和Mediti700表现出平衡的性能(平均117µm和114µm，分别)，而Primescan始终显示出高偏差（平均127µm）。（5）结论：基于临床公认的口内扫描准确性阈值，全足弓扫描通常为200微米，Trios5超越了这些基准，其平均偏差在200µm范围内。EmeraldS和Mediti700也符合这些标准，而Primescan,尽管显示出很高的总体偏差，接近临床可接受性的上限。考虑到体外研究的局限性，研究结果表明,接受评估的每个口内扫描仪都能够可靠且一致地捕获齿状患者的完整牙弓扫描.
