Siadat Hakimeh, Chitsaz Foujan, Zeighami Somayeh, Esmaeilzadeh Alireza
Department of Prosthodontics, School of Dentistry, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, New South Wales, Australia.
Clin Exp Dent Res. 2024 Apr;10(2):e857. doi: 10.1002/cre2.857.
Limited studies are available on the accuracy of intraoral scanners (IOSs) for full-arch implant and tooth models. This study aimed to assess the accuracy of maxillary full-arch digital impressions of tooth and implant models made by two IOSs.
This in vitro, experimental study was conducted on two maxillary dentiform models: one with six prepared natural teeth and the other with six implants at the site of canine, first premolar, and first molar teeth, bilaterally. A highly accurate industrial scanner was used for actual measurements on the models that served as the reference scan. TS (Trios3) and CO (CEREC Omnicam) IOSs were then used to scan each model 10 times according to the manufacturer's instructions. All scans were saved in STL format. The GOM Inspect software was used according to the best-fit algorithm to compare the accuracy of measurements in the groups with the reference scan. The trueness and precision were calculated. Statistical analyses were carried out using SPSS by one-way analysis of variance and t-test (α = .05).
TS showed a significantly higher trueness than CO for both tooth and implant models (p < .05). TS also revealed significantly higher precision than CO for the tooth model; however, the difference in precision for the implant model was not significant between the two IOSs (p > .05).
TS showed higher accuracy than CO in both tooth and implant models.
关于口腔内扫描仪（IOS）用于全牙弓种植体和牙齿模型的准确性的研究有限。本研究旨在评估两种IOS对上颌全牙弓牙齿和种植体模型数字印模的准确性。
本体外实验研究针对两个上颌牙形模型进行：一个模型有6颗预备好的天然牙，另一个模型双侧犬牙、第一前磨牙和第一磨牙部位有6颗种植体。使用高精度工业扫描仪对模型进行实际测量，作为参考扫描。然后按照制造商的说明，使用TS（Trios3）和CO（CEREC Omnicam）IOS对每个模型进行10次扫描。所有扫描均保存为STL格式。使用GOM Inspect软件根据最佳拟合算法，将各实验组的测量准确性与参考扫描进行比较。计算真实性和精密度。使用SPSS进行单因素方差分析和t检验进行统计分析（α = 0.05）。
对于牙齿和种植体模型，TS的真实性均显著高于CO（p < 0.05）。对于牙齿模型，TS的精密度也显著高于CO；然而，两种IOS在种植体模型精密度上的差异不显著（p > 0.05）。
在牙齿和种植体模型方面，TS的准确性均高于CO。
