Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, The Netherlands.
Am J Orthod Dentofacial Orthop. 2012 Sep;142(3):308-13. doi: 10.1016/j.ajodo.2012.03.031.
Our objectives were to determine the validity and reproducibility of measurements on stereolithographic models and 3-dimensional digital dental models made with an intraoral scanner.
Ten dry human skulls were scanned; from the scans, stereolithographic models and digital models were made. Two observers measured transversal distances, mesiodistal tooth widths, and arch segments on the skulls and the stereolithographic and digital models. All measurements were repeated 4 times. Arch length discrepancy and tooth size discrepancy were calculated. Statistical analysis was performed by using paired t tests.
For the measurements on the stereolithographic and digital models, statistically significant differences were found. However, these differences were considered to be clinically insignificant. Digital models had fewer statistically significant differences and generally the smallest duplicate measurement errors compared with the stereolithographic models.
Stereolithographic and digital models made with an intraoral scanner are a valid and reproducible method for measuring distances in a dentition.
本研究旨在确定基于口腔内扫描仪制作的立体光刻模型和三维数字牙颌模型的测量有效性和可重复性。
对 10 个干燥的人类头颅标本进行扫描；通过扫描制作立体光刻模型和数字模型。两位观察者分别在头颅标本、立体光刻模型和数字模型上测量横向距离、近远中牙宽度和牙弓段。所有测量均重复 4 次。计算牙弓长度不调与牙量不调。采用配对 t 检验进行统计学分析。
在立体光刻模型和数字模型上的测量中，发现存在统计学差异。然而，这些差异被认为临床意义不大。与立体光刻模型相比，数字模型的统计学差异更少，且通常具有最小的重复测量误差。
基于口腔内扫描仪制作的立体光刻和数字模型是一种有效且可重复的测量牙列内距离的方法。
