Guo Fang, Huang Shuo, Liu Ning, Hu Min, Shi Changquan, Li Dichen, Liu Changkui
Department of Oral and Maxillofacial Surgery, School of Stomatology, Xi'an Medical University.
Department of Oral and Maxillofacial Surgery, General Hospital of PLA.
Dent Mater J. 2022 Nov 30;41(6):816-823. doi: 10.4012/dmj.2022-063. Epub 2022 Jul 20.
Compared with CAD/CAM, fused deposition modeling (FDM) 3D printing technology is simple and safe to operate and has a low cost and high material utilization rate; thus, it is widely used. The present investigation aimed to evaluate the mechanical properties and fit of polyetheretherketone (PEEK) removable partial dentures (RPDs) constructed by FDM. We analyzed mechanical properties of PEEK samples prepared by FDM, milling, or injection molding. RPDs were designed and finite element analysis models was constructed to evaluate maximum stress and strain in the RPDs, cortical bone and mucosa. Geomagic Qualify software was used to analyze gaps between the model and the tissue surface of the framework. The results showed that the compressive strength of the 3D-printed PRDs was greater than that of the injection-molded samples. Finite element analysis demonstrated that the maximum stress on the PRDs was less than the yield strength of the material. Overall, the mechanical properties and fit of the PEEK RPD fabricated by FDM technology essentially fulfilled clinical requirements.
与计算机辅助设计/计算机辅助制造（CAD/CAM）相比，熔融沉积建模（FDM）3D打印技术操作简单、安全，成本低且材料利用率高，因此被广泛应用。本研究旨在评估通过FDM构建的聚醚醚酮（PEEK）可摘局部义齿（RPD）的力学性能和适合性。我们分析了通过FDM、铣削或注塑成型制备的PEEK样品的力学性能。设计了RPD并构建了有限元分析模型，以评估RPD、皮质骨和黏膜中的最大应力和应变。使用Geomagic Qualify软件分析模型与支架组织表面之间的间隙。结果表明，3D打印的PRD的抗压强度大于注塑成型样品的抗压强度。有限元分析表明，PRD上的最大应力小于材料的屈服强度。总体而言，通过FDM技术制造的PEEK RPD的力学性能和适合性基本满足临床要求。
