Gebhardt Marc, Kurz Sascha, Grundmann Fanny, Klink Thomas, Slowik Volker, Heyde Christoph-Eckhard, Steinke Hanno
Institute of Experimental Mechanics, Faculty of Civil Engineering, Leipzig University of Applied Sciences, 04277 Leipzig, Germany.
Institute of Anatomy, Faculty of Medicine, Leipzig University, 04103 Leipzig, Germany.
Bioengineering (Basel). 2025 Aug 11;12(8):862. doi: 10.3390/bioengineering12080862.
The osseo-ligamentous lumbopelvic complex is essential for musculoskeletal load transfer, yet location-specific material data and standardized test protocols remain scarce, which is a hindrance for comparability. Based on 91 specimen locations per cadaver (five cadavers, average age: 77.3 years), we developed detailed methods for specimen preparation and mechanical testing (bending, tensile, and compression) with defined boundary conditions. Multiple measurements were taken to assess repeatability. The proposed methods allow us to identify location-specific properties of the lumbopelvic system for the first time. Cortical bone exhibited an elastic modulus of 1750 MPa and an ultimate strength of 28.2 MPa, while those of trabecular bone were 32.7 MPa and 1.26 MPa, and soft tissues revealed values of 148 MPa and 14.3 MPa for fascial tissue and 103 MPa with 10.7 MPa for ligamentous tissue, respectively. The quantified properties for cortical and trabecular bone and soft tissues not only enhance the comparability of material properties but also support more accurate numerical simulations and implant design. Furthermore, the ease of implementation and standardization of these methods enable their widespread application, as well as the accumulation of a broad database and the setting of benchmarks for future investigations.
骨韧带性腰骶骨盆复合体对于肌肉骨骼负荷传递至关重要，但特定部位的材料数据和标准化测试方案仍然匮乏，这阻碍了可比性。基于每具尸体91个标本位置（五具尸体，平均年龄：77.3岁），我们制定了详细的标本制备和机械测试（弯曲、拉伸和压缩）方法，并确定了边界条件。进行了多次测量以评估重复性。所提出的方法使我们首次能够识别腰骶骨盆系统特定部位的特性。皮质骨的弹性模量为1750兆帕，极限强度为28.2兆帕，而小梁骨的弹性模量和极限强度分别为32.7兆帕和1.26兆帕，软组织中筋膜组织的弹性模量和极限强度分别为148兆帕和14.3兆帕，韧带组织的弹性模量和极限强度分别为103兆帕和10.7兆帕。皮质骨、小梁骨和软组织的量化特性不仅提高了材料特性的可比性，还支持更精确的数值模拟和植入物设计。此外，这些方法易于实施和标准化，使其能够广泛应用，以及积累广泛的数据库并为未来研究设定基准。
