目的:本研究旨在评估使用基于DLP的3D打印与不同制造工作流程-开放式和专有-相对于铣削技术生产的临时冠的适合性。
方法:使用复制技术评估了总共120个冠。对照组(米尔,n=30)是通过减法技术制造的。使用DLP打印机(SprintRay®Pro95)打印实验组。在专有模式下(SR100,n=30),制造商使用的树脂层厚度为100μm(LT),并进行了飞溅清洁后处理。在打开模式下,使用经过验证的树脂。组B100(n=30)的LT为100μm,B50组(n=30)的厚度为50μm,然后在超声波浴中进行后处理,并完全浸入异丙醇中。正常分析后应用Bonferroni校正的Kruskal-Wallis检验(α=0.05)。
结果:B50组表现出最佳的整体拟合(123.87±67.42μm),与黄金标准铣削组相当,这证明了最低的边际拟合(p=0.760)。与Mill相比,SR100的性能明显较差,B50和B100(p<0.001)。
结论:3D打印和铣削的临时冠通常显示出临床上可接受的配合,SR100组除外。后处理显著影响冠配合,与开放模式与完全浸入异丙醇是优越的。
结论:本研究表明,选择最佳的制造和后处理工作流程可以更好地适应临时冠。这使牙科专业人员能够评估方案并确保可靠的结果,并在临时牙冠制造中改善临床结果。
OBJECTIVE: This
study aimed to assess the fit of interim crowns produced using DLP-based 3D printing with different manufacturing workflows-open and proprietary-versus milling technology.
METHODS: A total of 120 crowns were evaluated using the replica technique. The control group (Mill, n = 30) was manufactured via subtractive technology. Experimental groups were printed using a DLP printer (SprintRay Pro95). In the proprietary mode (SR100, n = 30), manufacturer resin was used with a 100-μm layer thickness (LT) and a splashing cleaning postprocessing. In the open mode, validated resin was used. Group B100 (n = 30) had a 100-μm LT, and group B50 (n = 30) had a 50-μm followed by
postprocessing in an ultrasonic bath with full immersion in isopropyl alcohol. Kruskal-Wallis tests with Bonferroni correction was applied after normal analysis (α = 0.05).
RESULTS: Group B50 exhibited the best overall fit (123.87 ± 67.42 μm), which was comparable to the gold standard Milling group, which demonstrated the lowest marginal fit (p = 0.760). SR100 showed significantly poorer performance compared to Mill, B50, and B100 (p < 0.001).
CONCLUSIONS: 3D printed and milled interim crowns generally demonstrated clinically acceptable fit, with the exception of the SR100 group.
Postprocessing notably influenced crown fit, with the open mode with total immersion in isopropyl alcohol being superior.
CONCLUSIONS: The present
study demonstrates that the selection of an optimal manufacturing and
postprocessing workflow results in superior fit for interim crowns. This enables dental professionals to evaluate protocols and ensure reliable outcomes with improved clinical outcomes in interim crown fabrication.