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首页> 外文期刊>International journal of computerized dentistry >Impact of different scanning strategies on the accuracy of two current intraoral scanning systems in complete-arch impressions: an in vitro study
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Impact of different scanning strategies on the accuracy of two current intraoral scanning systems in complete-arch impressions: an in vitro study

机译：不同扫描策略对完整拱门印象中两个当前内部扫描系统的准确性的影响：体外研究

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Aim: To determine the scanning strategy that obtains the most accurate results for two intraoral scanners (IOS) in complete-arch digital impressions. Scan time was evaluated and correlated with scan strategies. Materials and method: A custom model used as the reference standard was fabricated with teeth having dentin- and enamel-identical refractive indices simulating natural dentition. A reference scan of the custom typodont was obtained using an ATOS III Triple Scan 3D optical scanner. Two IOS setups - Omnicam v 5.1.0 and Primescan v 5.0.2 - were used for complete-arch scanning, each using 13 scanning strategies, obtaining 260 digital files (n = 10 per group), recording each scan time, converting all experimental scans to standard tessellation language (STL) format, and using a comprehensive metrology program to compare the reference standard scan with the experimental scans. Statistical analyses utilized Welch's unequal variances t test. Results: Group M exhibited the lowest trueness and precision values (P < 0.05) for Primescan (47.5% of the average among all other groups) and the lowest trueness value (P < 0.05) for Omnicam (53.4% of the average among all other groups), where group B exhibited the lowest precision value (65.6% of the average among all other groups) with P < 0.05. Primescan featured a better trueness index (4.79 μm) than that of Omnicam (19.13 μm), with a statistically significant difference (P < 0.00001). Primescan, group M, also featured a better precision index (4.67 μm) than Omnicam, group B (16.75 μm), with a statistically significant difference (P < 0.00001). Conclusion: For both IOS systems, group M provided the lowest scanning times. For trueness and precision of complete-arch scans, group M was the dominant scanning strategy in Primescan, while there was no dominant strategy in Omnicam. Group M had the best scanning time for both IOS systems.
机译：目的：确定在完整拱形数字印象中获得两个脑内扫描仪（iOS）最准确的扫描策略。扫描时间与扫描策略进行评估和相关。材料和方法：用作参考标准的自定义模型用牙齿制造了牙齿和牙釉质相同的折射指数，模拟自然牙列。使用ATOS III三重扫描3D光学扫描仪获得自定义Typodont的参考扫描。两个iOS设置 - Omnicam v 5.1.0和primeScan v 5.0.2 - 用于完整拱扫描，每个都使用13扫描策略，获取260个数字文件（每组n = 10），记录每个扫描时间，转换所有实验扫描标准曲面细分语言（STL）格式，并使用全面的计量程序将参考标准扫描与实验扫描进行比较。统计分析利用韦尔奇的不平等差异测试。结果：M组集团展示了PrimeScan的最低文化和精度值（P <0.05）（占所有其他组的平均值的47.5％），而OMNICAM的最低特色（P <0.05）（占所有其他平均值的53.4％）组），B组展示了P <0.05的最低精度值（所有其他组的平均值的65.6％）。 PrimeScan采用比Omnicam（19.13μm）更好的真实性指数（4.79μm），差异有统计学意义（P <0.00001）。 PrimeScan，M群，也是比Omnicam，B组（16.75μm）的更好的精度指数（4.67μm），具有统计学显着差异（P <0.00001）。结论：对于iOS系统，组M提供最低的扫描时间。对于完整拱扫描的真实和精确度，M组是Primescan中的主导扫描策略，而Omnicam则没有主导战略。组M对iOS系统进行了最佳扫描时间。

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