Department of Orthodontics and Temporomandibular Disorders, Poznań University of Medical Sciences, Poznań, Poland.
University Dental Centre, Poznań University of Medical Sciences, Poznań, Poland.
Med Sci Monit Basic Res. 2024 Sep 26;30:e944051. doi: 10.12659/MSMBR.944051.
BACKGROUND Modern prosthetic technologies make it possible to fabricate prosthetic restorations without material loss and to make prosthetic restorations with complex geometric shapes in a relatively simple way. One such technology is selective laser melting (SLM), or additive manufacturing of metal materials, better known as 3D printing from metal or selective laser melting, but currently the most commonly used method is casting. The present study investigated use of dental chromium-cobalt alloys for prosthetic bridges and compared methods of processing dental chromium-cobalt alloys to obtain the best mechanical properties. MATERIAL AND METHODS We used dental chromium-cobalt alloy (SCHEFTNER GMBH) for laser melting StarbondCoSEeasy Powder with grain size of 10-30 µm and StarbondCoS alloy casting, made in accordance with the European standard EN ISO 22674. SLM-made specimens and induction melted alloy castings were prepared for the study. A centrifugal casting system with induction current melting of the metal alloy was used to produce the samples. The melting and casting process is automatic and limits changes in chemical composition. RESULTS The results show that none of the samples changed their chemical composition, while the samples made by SLM had better mechanical properties. CONCLUSIONS The SLM technique makes it possible to produce restorations faster and cheaper without any loss of quality compared to restorations made with the casting technique. Casting technology reduces mechanical properties, but still provides good mechanical properties.
现代假肢技术使得在不损失材料的情况下制造假肢修复体，并以相对简单的方式制造具有复杂几何形状的假肢修复体成为可能。其中一项技术是选择性激光熔化（SLM），或金属材料的增材制造，更通俗的说法是金属 3D 打印或选择性激光熔化，但目前最常用的方法是铸造。本研究调查了牙科铬钴合金在假肢桥中的应用，并比较了加工牙科铬钴合金的方法，以获得最佳的机械性能。
我们使用牙科铬钴合金（SCHEFTNER GMBH）进行激光熔化 StarbondCoSEeasy Powder，粒度为 10-30μm，并进行 StarbondCoS 合金铸造，符合欧洲标准 EN ISO 22674。为研究制备了 SLM 制造的试样和感应熔化合金铸锭。使用带有感应电流熔化金属合金的离心铸造系统来生产样品。熔化和铸造过程是自动的，并限制化学成分的变化。
结果表明，没有一个样品改变了其化学成分，而 SLM 制造的样品具有更好的机械性能。
与铸造技术制造的修复体相比，SLM 技术可在不损失质量的情况下更快、更便宜地生产修复体。铸造技术会降低机械性能，但仍能提供良好的机械性能。
