Mansat P, Barea C, Hobatho M C, Darmana R, Mansat M
Service de Chirurgie Orthopédique et Traumatologie, CHV Purpan, Toulouse, France.
J Shoulder Elbow Surg. 1998 Mar-Apr;7(2):109-15. doi: 10.1016/s1058-2746(98)90219-1.
Finite element analysis modeling is an important tool in the design of total joint replacements. However, to use a finite element analysis the material properties of the studied bone must be known. The aim of the study was to measure the elastic properties of the glenoid bone in the axial, coronal, and sagittal planes with an ultrasound transmission technique. The relative density and Houndsfield computed tomography numbers were also assessed. Three pairs of scapulas were obtained from unembalmed human cadavers. Seventy-four cubic cancellous bone specimens of 6 mm were used for ultrasonic measurements. The study showed significant differences with anatomic location. Mechanical properties of cancellous bone were found to be higher near the direction of application of the resultant force, perpendicular to the articular surface of the glenoid. Mechanical properties were found to be significantly higher at the center and posterior edge of the glenoid (p < 0.01). Significant differences were also found in the three planes studied. The lateromedial Young's modulus (E1) was higher than the anteroposterior modulus (E2) and the superoinferior modulus (E3) (E1 = 372 +/- 164 MPa, E2 = 222 +/- 79 MPa, E3 = 198 +/- 75 MPa).
有限元分析建模是全关节置换设计中的一项重要工具。然而，要进行有限元分析，必须了解所研究骨骼的材料特性。本研究的目的是采用超声透射技术测量肩胛盂骨在轴向、冠状面和矢状面的弹性特性。还评估了相对密度和豪氏计算断层扫描数值。从未防腐处理的人类尸体上获取了三对肩胛骨。74个6毫米的立方松质骨标本用于超声测量。研究表明，不同解剖位置存在显著差异。发现松质骨的力学性能在合力作用方向附近、垂直于肩胛盂关节面处较高。肩胛盂中心和后缘的力学性能显著更高（p < 0.01）。在所研究的三个平面中也发现了显著差异。内外侧杨氏模量（E1）高于前后模量（E2）和上下模量（E3）（E1 = 372 +/- 164兆帕，E2 = 222 +/- 79兆帕，E3 = 198 +/- 75兆帕）。
