Weißmann Volker, Ramskogler Tim, Schulze Christian, Bader Rainer, Hansmann Harald
Faculty of Engineering, University of Applied Sciences, Technology, Business and Design, Philipp-Müller-Str. 14, 23966 Wismar, Germany.
Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medicial Center, Doberaner Strasse 142, 18057 Rostock, Germany.
Materials (Basel). 2019 Mar 30;12(7):1052. doi: 10.3390/ma12071052.
The development in implants such as acetabular cups using additive manufacturing techniques is playing an increasingly important role in the healthcare industry.
This study compared the primary stability of four selectively laser-melted press-fit cups (Ti6Al4V) with open-porous, load-bearing structural elements on the surface. The aim was to assess whether the material of the artificial bone stock affects the primary stability of the acetabular cup. The surface structures consist of repeated open-porous, load-bearing elements orthogonal to the acetabular surface. Experimental pull-out and lever-out tests were performed on exact-fit and press-fit cups to evaluate the primary stability of the cups in different synthetic bone substitutes. The acetabular components were placed in three different commercially available synthetic materials (ROHACELL-IGF 110, SikaBlock M330, Sawbones Solid Rigid). Results & conclusions: Within the scope of the study, it was possible to show the differences in fixation strength between the tested acetabular cups depending on their design, the structural elements used, and the different bone substitute material. In addition, functional correlations could be found which provide a qualitative reference to the material density of the bone stock and the press-fit volume of the acetabular cups.
使用增材制造技术的植入物（如髋臼杯）的发展在医疗保健行业中发挥着越来越重要的作用。
本研究比较了四种表面带有开放多孔、承重结构元件的选择性激光熔化压配杯（Ti6Al4V）的初始稳定性。目的是评估人工骨材料是否会影响髋臼杯的初始稳定性。表面结构由与髋臼表面正交的重复开放多孔、承重元件组成。对紧配杯和压配杯进行了实验性拔出和撬出试验，以评估杯在不同合成骨替代物中的初始稳定性。髋臼组件被放置在三种不同的市售合成材料（ROHACELL-IGF 110、SikaBlock M330、Sawbones Solid Rigid）中。结果与结论：在本研究范围内，有可能展示出所测试的髋臼杯在固定强度上的差异，这些差异取决于它们的设计、所使用的结构元件以及不同的骨替代材料。此外，还发现了功能相关性，这些相关性为骨材料的密度和髋臼杯的压配体积提供了定性参考。
