Int J Oral Maxillofac Implants. 2022 Jul-Aug;37(4):731-739. doi: 10.11607/jomi.9248.
To evaluate the effect of six scan patterns on the accuracy and speed of digital impressions with two different intraoral scanners for complete-arch implant rehabilitation.
A master model containing six parallelly placed implant analogs was fabricated, and six scan bodies were connected to the analogs. Reference scan was obtained with a laboratory scanner. Test scans were obtained by intraoral scanning with six scan patterns using 3Shape TRIOS 3 and Carestream CS 3600 intraoral scanners. Scanning time was recorded. Trueness and precision were assessed with an inspection software. Two-way analysis of variance (ANOVA) was performed to examine the effect of scan pattern, scanner, and their interaction on accuracy and scanning time. Differences between the six scan patterns with each scanner were tested by one-way ANOVA. Differences between the two scanners were evaluated by t test. The level of significance was set at α = .05.
For trueness, the effects of scanner, scan pattern, and their interaction were significantly different in both linear and angular discrepancy. For precision, the scanner and scan pattern each had a significant effect on linear discrepancy independently, while their interaction did not. Only the effects of scanners were significantly different in angular discrepancy. For each of the two scanners, significant differences were detected in accuracy and speed between the patterns.
Scan pattern significantly influenced the accuracy and speed of digital impressions for complete-arch implant rehabilitation.
评估 6 种扫描模式对两种不同口内扫描仪用于全牙弓种植修复的数字化印模的准确性和速度的影响。
制作包含 6 个平行放置的种植体模拟体的母模，并将 6 个扫描体连接到模拟体上。采用实验室扫描仪获取参考扫描。使用 3Shape TRIOS 3 和 Carestream CS 3600 口内扫描仪，通过 6 种扫描模式进行口内扫描获取测试扫描。记录扫描时间。使用检测软件评估准确性和精度。采用双向方差分析（ANOVA）检验扫描模式、扫描仪及其相互作用对准确性和扫描时间的影响。用单向方差分析检验各扫描仪 6 种扫描模式之间的差异。用 t 检验评估两种扫描仪之间的差异。显著性水平设为 α =.05。
在线性和角度偏差方面，扫描仪、扫描模式及其相互作用的影响在准确性方面均有显著差异。在精度方面，扫描仪和扫描模式各自对线性偏差有显著影响，而它们的相互作用没有。角度偏差仅受扫描仪的影响有显著差异。对于两种扫描仪中的每一种，在准确性和速度方面，各扫描模式之间均存在显著差异。
扫描模式显著影响全牙弓种植修复的数字化印模的准确性和速度。
