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不同当代 3D 打印机制作的正畸保持器机械性能的比较分析。

Comparative analysis of mechanical properties of orthodontic aligners produced by different contemporary 3D printers.

机构信息

Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.

Private practice, Limassol, Cyprus.

出版信息

Orthod Craniofac Res. 2022 Aug;25(3):336-341. doi: 10.1111/ocr.12537. Epub 2021 Oct 4.

DOI:10.1111/ocr.12537
PMID:34569692
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9544566/
Abstract

OBJECTIVE

The aim of this study was to compare the mechanical properties of orthodontic aligners among different commercially available 3D printing devices.

MATERIALS AND METHODS

Five 3D printers (Ka:rv LP 550, Swinwon; "KAR"), (L120, Dazz 3D; "L12"), (MiiCraft 125, Miicraft Jena; "MIC"), (Slash 2, Uniz; "SLS") and (Pro 95, SprintRay; "PRO") were used to prepare orthodontic aligners with dental resin (Tera Harz TC-85DAW, Graphy). The central incisors of each aligner were cut, prepared and evaluated in terms of Martens-Hardness (HM), indentation-modulus (E ) and elastic-index (η ) as per ISO14577-1:2002. Force-indentation curves were recorded and differences among printers were checked with generalized linear regressions (alpha=5%).

RESULTS

Statistically significant differences were seen for all mechanical properties (P < .05), which were in descending order: HM (N/mm ) as median (Interquartile Range [IQR]): SLS 108.5 (106.0-112.0), L12 103.0 (102.0-107.0), KAR 101.5 (97.5-103.0), MIC 100.0 (97.5-101.5) and PRO 94.0 (93.0-96.0); E (MPa) as mean (Standard Deviation [SD]): SLS 2696.3 (124.7), L12 2627.8 (73.5), MIC 2566.2 (125.1), KAR 2565.0 (130.2) and PRO 2491.2 (53.3); and η (%) as median (IQR): SLS 32.8 (32.3-33.1), L12 31.6 (30.8-32.3), KAR 31.3 (30.9-31.9), MIC 30.5 (29.9-31.2) and PRO 29.5 (29.1-30.0). Additionally, significant differences existed between liquid crystal display (LCD) and digital light processing (DLP) printers for HM (P < .001), E (P = .002) and η (P < .001), with aligners from the former having higher values than aligners from the latter printer.

CONCLUSION

Under the limitations of this study, it may be concluded that the mechanical properties of 3D-printed orthodontic aligners are dependent on the 3D printer used, and thus, differences in their clinical efficacy are anticipated.

摘要

目的

本研究旨在比较不同市售 3D 打印设备制作的正畸矫治器的机械性能。

材料和方法

使用 5 种 3D 打印机（Ka:rv LP 550，Swinwon；“KAR”）、（L120，Dazz 3D；“L12”）、（MiiCraft 125，Miicraft Jena；“MIC”）、（Slash 2，Uniz；“SLS”）和（Pro 95，SprintRay；“PRO”）用牙科树脂（Tera Harz TC-85DAW，Graphy）制备正畸矫治器。每个矫治器的中切牙被切割、准备并按照 ISO14577-1:2002 进行马氏硬度（HM）、压入模量（E）和弹性指数（η）评估。记录力-压入曲线，并使用广义线性回归检查打印机之间的差异（α=5%）。

结果

所有机械性能均存在统计学显著差异（P<.05），按降序排列为：HM（N/mm）中位数（四分位距[IQR]）：SLS 108.5（106.0-112.0）、L12 103.0（102.0-107.0）、KAR 101.5（97.5-103.0）、MIC 100.0（97.5-101.5）和 PRO 94.0（93.0-96.0）；E（MPa）平均值（标准差[SD]）：SLS 2696.3（124.7）、L12 2627.8（73.5）、MIC 2566.2（125.1）、KAR 2565.0（130.2）和 PRO 2491.2（53.3）；和 η（%）中位数（IQR）：SLS 32.8（32.3-33.1）、L12 31.6（30.8-32.3）、KAR 31.3（30.9-31.9）、MIC 30.5（29.9-31.2）和 PRO 29.5（29.1-30.0）。此外，HM（P<.001）、E（P=.002）和 η（P<.001）方面，液晶显示器（LCD）和数字光处理（DLP）打印机之间存在显著差异，前者的矫治器具有比后者更高的值。

结论

在本研究的限制下，可以得出结论，3D 打印正畸矫治器的机械性能取决于所使用的 3D 打印机，因此预计它们的临床疗效存在差异。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6eaa/9544566/8bbd6b327aad/OCR-25-336-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6eaa/9544566/62bdb65407ea/OCR-25-336-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6eaa/9544566/8bbd6b327aad/OCR-25-336-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6eaa/9544566/62bdb65407ea/OCR-25-336-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6eaa/9544566/8bbd6b327aad/OCR-25-336-g001.jpg

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