Wegmüller Lukas, Halbeisen Florian, Sharma Neha, Kühl Sebastian, Thieringer Florian M
Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, 4123 Allschwil, Switzerland.
Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, University of Basel, 4031 Basel, Switzerland.
J Clin Med. 2021 Oct 23;10(21):4894. doi: 10.3390/jcm10214894.
This study evaluates the accuracy of drill guides fabricated in medical-grade, biocompatible materials for static, computer-aided implant surgery (sCAIS). The virtually planned drill guides of ten completed patient cases were printed ( = 40) using professional (Material Jetting (MJ)) and consumer-level three-dimensional (3D) printing technologies, namely, Stereolithography (SLA), Fused Filament Fabrication (FFF), and Digital Light Processing (DLP). After printing and post-processing, the drill guides were digitized using an optical scanner. Subsequently, the drill guide's original (reference) data and the surface scans of the digitized 3D-printed drill guide were superimposed to evaluate their incongruencies. The accuracy of the 3D-printed drill guides was calculated by determining the root mean square (RMS) values. Additionally, cast models of the planned cases were used to check that the drill guides fitted manually. The RMS (mean ± SD) values for the accuracy of 3D-printed drill guides were-MJ (0.09 ± 0.01 mm), SLA (0.12 ± 0.02 mm), FFF (0.18 ± 0.04 mm), and DLP (0.25 ± 0.05 mm). Upon a subjective assessment, all drill guides could be mounted on the cast models without hindrance. The results revealed statistically significant differences ( < 0.01) in all except the MJ- and SLA-printed drill guides. Although the measured differences in accuracy were statistically significant, the deviations were negligible from a clinical point of view. Within the limits of this study, we conclude that consumer-level 3D printers can produce surgical guides with a similar accuracy to a high-end, professional 3D printer with reduced costs.
本研究评估了采用医用级生物相容性材料制造的钻孔导向器在静态计算机辅助种植手术（sCAIS）中的准确性。使用专业的（材料喷射（MJ））和消费级三维（3D）打印技术，即立体光刻（SLA）、熔融沉积成型（FFF）和数字光处理（DLP），打印了十个已完成患者病例的虚拟规划钻孔导向器（n = 40）。打印并进行后处理后，使用光学扫描仪对钻孔导向器进行数字化处理。随后，将钻孔导向器的原始（参考）数据与数字化3D打印钻孔导向器的表面扫描数据进行叠加，以评估它们的不一致性。通过确定均方根（RMS）值来计算3D打印钻孔导向器的准确性。此外，使用规划病例的石膏模型来手动检查钻孔导向器是否适配。3D打印钻孔导向器准确性的RMS（平均值±标准差）值分别为 - MJ（0.09±0.01毫米）、SLA（0.12±0.02毫米）、FFF（0.18±0.04毫米）和DLP（0.25±0.05毫米）。经主观评估，所有钻孔导向器均可无障碍地安装在石膏模型上。结果显示，除MJ和SLA打印的钻孔导向器外，其他所有导向器在统计学上均存在显著差异（P < 0.01）。尽管测量的准确性差异具有统计学意义，但从临床角度来看，偏差可忽略不计。在本研究的范围内，我们得出结论，消费级3D打印机能够以与高端专业3D打印机相似的准确性生产手术导向器，且成本更低。
