Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Munich, Germany.
Department of Prosthetic Dentistry, University Hospital, Ludwig-Maximilians-University, Munich, Germany.
Int Endod J. 2020 Oct;53(10):1446-1454. doi: 10.1111/iej.13361. Epub 2020 Jul 24.
To assess the suitability of several 3D-printed resins for the manufacturing of tooth replicas for endodontic training in comparison with commercially available replicas by analysing the properties of the materials and comparing them with real teeth during endodontic training.
Tooth replicas were 3D-printed using four resins (NextDent Model, NextDent C&B, V-Print ee and Vero White Plus) and compared with two commercially available products (VDW and Smile Factory) as well as extracted human teeth. Martens hardness, indentation modulus and radiopacity were investigated on these tooth replicas. Experienced dentists evaluated the suitability of the replicas for endodontic training by comparing them with real teeth in terms of appearance, anatomy, radiopacity, similarity to dentine during access opening, canal gauging and canal instrumentation. Data were analysed using the Kolmogorov-Smirnov and Mann-Whitney U-test.
The greatest hardness values were recorded for human dentine (P < 0.001), followed by V-Print ee and the commercial tooth replica of Smile Factory. The greatest radiopacity was associated with VOC and dentine (P < 0.001) in comparison with the other materials tested. The appearance of the in-house printed tooth replicas was subjectively evaluated by the dentists as being more realistic than the commercially available products. No differences between the replicas was detected during mechanical instrumentation of root canals.
None of the tooth replicas were able to simulate human dentine from the perspectives evaluated. V-Print ee had radiopacity comparable with dentine, but its hardness was not comparable with dentine.
通过分析材料性能并在根管训练中与真实牙齿进行比较，评估几种 3D 打印树脂在制造根管训练用牙复制体方面的适用性，与市售复制体进行比较。
使用四种树脂（NextDent Model、NextDent C&B、V-Print ee 和 Vero White Plus）对牙复制体进行 3D 打印，并与两种市售产品（VDW 和 Smile Factory）以及提取的人牙进行比较。对这些牙复制体的马氏硬度、压痕模量和射线可透性进行了研究。经验丰富的牙医通过与真实牙齿进行比较，从外观、解剖结构、射线可透性、在开口时与牙本质的相似性、根管测量和根管器械使用等方面评估复制体在根管训练中的适用性。使用 Kolmogorov-Smirnov 和 Mann-Whitney U 检验对数据进行分析。
人牙本质的硬度值最大（P<0.001），其次是 V-Print ee 和 Smile Factory 的商用牙复制体。与测试的其他材料相比，最大的射线可透性与 VOC 和牙本质相关（P<0.001）。牙医主观评估内部打印的牙复制体的外观比市售产品更逼真。在根管机械器械使用过程中，未发现复制体之间存在差异。
在所评估的方面，没有一种牙复制体能模拟人牙本质。V-Print ee 的射线可透性与牙本质相当，但硬度与牙本质不相当。
