肱骨近端骨折（Neer 3型）骨植入物结构的尸体生物力学评估
Cadaveric-biomechanical evaluation of bone-implant construct of proximal humerus fractures (Neer type 3).
作者信息
Fankhauser Florian, Schippinger Gert, Weber Kurt, Heinz Sablatnög, Quehenberger Franz, Boldin Christian, Bratschitsch Gerhard, Szyszkowitz Rudolf, Georg Leb, Friedrich Anderhuber
机构信息
University Clinic of Traumatology, Medical School of graz, Austria.
出版信息
J Trauma. 2003 Aug;55(2):345-9. doi: 10.1097/01.TA.0000033139.61038.EF.
BACKGROUND
A biomechanical cadaver study was performed to test the stability and strength of screw osteosynthesis of surgical neck fractures of the humerus.
METHODS
After bone density measurement, 64 cadaver proximal humerus bones were bent to create a subcapital fracture. The fracture was then stabilized by means of screw osteosynthesis randomly assigned to subgroups of screw positioning, size of screw, and stress test (torsion/bending).
RESULTS
Two screws applied laterally and parallel were 34.2% more stable than the normal arrangement. Bone density had a dominant role with regard to maximal bending and torsion force, but no significance was found with respect to additional screws through the major tuberculum or diameter of screws.
CONCLUSION
Two of the smaller 4.5-mm cannulated screws should be applied parallel from the lateral direction. Only range-of-motion exercises that produce a bending stress should be considered early after surgery, avoiding axial stress.
背景
进行了一项生物力学尸体研究，以测试肱骨外科颈骨折螺钉接骨术的稳定性和强度。
方法
在测量骨密度后，将64具尸体的近端肱骨弯曲以造成头下型骨折。然后通过螺钉接骨术进行固定，随机分为螺钉定位、螺钉尺寸和应力测试（扭转/弯曲）亚组。
结果
外侧平行应用两枚螺钉比正常排列稳定34.2%。骨密度在最大弯曲和扭转力方面起主导作用，但通过大结节的额外螺钉或螺钉直径方面未发现显著意义。
结论
应从外侧平行应用两枚较小的4.5毫米空心螺钉。术后早期仅应考虑产生弯曲应力的活动范围练习，避免轴向应力。
Zotero 插件