Gökmen Şule, Görgülü Serkan, Topsakal Kübra Gülnur, Duran Gökhan Serhat
University of Health Sciences Turkey, Gülhane Faculty of Dental Medicine, Department of Orthodontics, Ankara, Turkey.
Çanakkale Onsekiz Mart University Faculty of Dentistry, Department of Orthodontics, Çanakkale, Turkey.
Turk J Orthod. 2024 Dec 31;37(4):257-264. doi: 10.4274/TurkJOrthod.2024.2023.8.
This study aimed to compare the manufacturing accuracy of different printing techniques - Stereolithography (SLA), Digital Light Processing (DLP), and PolyJet-using digital dental models.
The study included cast models of 30 patients aged between 12 and 20 years. The selected models were scanned using an intraoral scanner, and surface topography format files were obtained. The models were produced from 3D printers with SLA, DLP, and PolyJet technology and scanned with an intraoral scanner. The digital files of the reference and printed models were superimposed with reverse engineering software. Root mean squared (RMS) values and point registration differences were evaluated. Furthermore, digital mesiodistal measurements of the teeth were taken to determine the point registration deviation values. Descriptive statistics were used to evaluate the measurements. ANOVA was used to evaluate differences between normally distributed data. In addition, a box plot was used to show the variability in the measurements, and the Bland-Altman test was used to examine the agreement between the measurements.
According to the digital superimposition data of DLP-SLA-PolyJet technologies, PolyJet had the smallest RMS (0.145±0.10 mm), followed by DLP and SLA (0.161±0.12 mm and 0.345±0.23 mm, respectively). In the mesiodistal dimensional measurement evaluations, there was no statistically significant difference (p>0.05) between the averages of the main reference and DLP, PolyJet, and SLA measurements for all teeth.
According to the results of this study, all three production technologies are clinically usable at the model production stage. However, SLA was found to be less accurate than DLP and PolyJet.
本研究旨在使用数字化牙科模型比较不同打印技术——立体光刻（SLA）、数字光处理（DLP）和PolyJet——的制造精度。
该研究纳入了30名年龄在12至20岁之间患者的石膏模型。使用口腔内扫描仪对所选模型进行扫描，获得表面形貌格式文件。这些模型由采用SLA、DLP和PolyJet技术的3D打印机制作，并使用口腔内扫描仪进行扫描。将参考模型和打印模型的数字文件用逆向工程软件进行叠加。评估均方根（RMS）值和点配准差异。此外，对牙齿进行数字近远中测量以确定点配准偏差值。使用描述性统计来评估测量结果。采用方差分析来评估正态分布数据之间的差异。此外，使用箱线图展示测量结果的变异性，并使用Bland-Altman检验来检验测量结果之间的一致性。
根据DLP-SLA-PolyJet技术的数字叠加数据，PolyJet的RMS最小（0.145±0.10毫米），其次是DLP和SLA（分别为0.161±0.12毫米和0.345±0.23毫米）。在近远中尺寸测量评估中，所有牙齿的主要参考测量平均值与DLP、PolyJet和SLA测量平均值之间无统计学显著差异（p>0.05）。
根据本研究结果，所有这三种生产技术在模型制作阶段在临床上均可使用。然而，发现SLA的精度低于DLP和PolyJet。
