Tunç Hamit
Faculty of Dentistry, Department of Pediatric Dentistry, Burdur Mehmet Akif Ersoy University, Bahcelievler Mah. Mitat Pasa Cad., Merkez/Burdur, 15100, Türkiye.
BMC Oral Health. 2025 Jul 21;25(1):1225. doi: 10.1186/s12903-025-06640-9.
Intraoral scanners (IOS) are increasingly utilized in pediatric dentistry to capture digital impressions, offering advantages over traditional impression materials, particularly in young patients. However, the accuracy and precision of these devices may be influenced by factors such as limited mouth opening, which is common in pediatric patients. This study aims to evaluate the effect of mouth opening on the accuracy of intraoral digital impressions obtained via two different IOS technologies: confocal microscopy (Trios 5) and structured light triangulation (Helios 600).
A typodont deciduous teeth model was scanned at three mouth opening levels (28 mm, 33 mm, 37 mm) using both IOS. Accuracy was analyzed through two-dimensional (2D) linear measurements and three-dimensional (3D) superimpositions, assessing trueness and precision. Statistical analysis was performed using Kruskal–Wallis and Mann–Whitney U tests ( < 0.05).
At all mouth opening levels, no statistically significant differences in trueness were observed between the two scanners ( > 0.05). However, a significant difference in precision was found at the 28 mm opening, where the Helios 600 exhibited notably lower 2D precision compared to the Trios 5, both in the maxilla ( = 0.02) and mandible ( = 0.03). The 3D precision values for scans obtained with the Helios 600 were statistically significantly lower than those obtained with the Trios 5, both in the maxilla ( = 0.017) and mandible ( = 0.021). No significant differences in precision were observed at the 33 mm and 37 mm openings ( > 0.05).
This study demonstrated that both the Trios 5 and Helios 600 intraoral scanners provided clinically acceptable trueness values. However, Trios 5 exhibited significantly better precision, particularly in cases with limited mouth opening. These results suggest that Trios 5 may offer improved reliability, especially for pediatric patients with reduced mouth opening.
口腔内扫描仪（IOS）在儿童牙科中越来越多地用于获取数字印模，与传统印模材料相比具有优势，尤其是在年轻患者中。然而，这些设备的准确性和精度可能会受到诸如张口受限等因素的影响，而张口受限在儿科患者中很常见。本研究旨在评估张口对通过两种不同IOS技术获得的口腔内数字印模准确性的影响：共聚焦显微镜（Trios 5）和结构光三角测量法（Helios 600）。
使用两种IOS在三个张口水平（28毫米、33毫米、37毫米）对一个乳牙模型进行扫描。通过二维（2D）线性测量和三维（3D）叠加分析准确性，评估真实性和精度。使用Kruskal–Wallis和Mann–Whitney U检验进行统计分析（<0.05）。
在所有张口水平下，两台扫描仪在真实性方面均未观察到统计学上的显著差异（>0.05）。然而，在28毫米张口时发现精度存在显著差异，此时Helios 600在二维精度方面明显低于Trios 5，在上颌（=0.02）和下颌（=0.03）均是如此。Helios 600获得的扫描的三维精度值在统计学上显著低于Trios 5获得的值，在上颌（=0.017）和下颌（=0.021）均是如此。在33毫米和37毫米张口时未观察到精度上的显著差异（>0.05）。
本研究表明，Trios 5和Helios 600口腔内扫描仪均提供了临床上可接受的真实性值。然而，Trios 5表现出明显更好的精度，特别是在张口受限的情况下。这些结果表明，Trios 5可能具有更高的可靠性，尤其是对于张口减小的儿科患者。
