摘要
目的通过生物力学研究,对比三种治疗肱骨近端骨折(Neer 3型)内固定结构的稳定性及耐久性。方法按照统一标准制作肱骨近端3部分外科颈大结节骨折模型,分别予空心钉、克氏针及三叶草钢板固定。所有标本进行循环外展实验、循环屈伸实验及压扭负载。结果加压空心钉的结构稳定性较克氏针好而次于三叶草钢板。空心钉及克氏针内固定结构稳定性与骨密度(BMD)有很大的相关性。结论加压空心钉治疗肱骨近端骨折是一种微创的内固定手术,手术时间短,能满足内固定的要求,提供术后患者进行功能锻炼的结构稳定性,是一种治疗老年肱骨近端骨折的可靠方法。
Objective To investigate the mechanical stability and durability of three methods for fixation of three-part proximal humeral fractures by using a cadaveric model. Methods A cadaveric three-part proximal humeral osteotomy model was used to perform a biomechanical evaluation of three types of internal fixation devices： cannulated compression screws, a cloverleaf plate, and Kirschner wires. The specimens were tested cyclically in abduction and in flexion- extend and in torsional load. Results The cannulated compression screws had greater stiffness than percutaneous pinning, but less than cloverleaf plate. Bone-mineral density was strongly correlated with the stift＇ness of the CCS and the PP. Conclusion The cannulated compression screws is an effective method of minimal invasion to treat proximal humerus fracture, which is strong enough for internal fixation and can provide sufficient stability allowing postoperative functional exercise.
出处
《中国骨与关节损伤杂志》
2012年第3期222-225,共4页
Chinese Journal of Bone and Joint Injury
基金
全军面上A类课题(06MA062)
关键词
生物力学
加压空心钉
经皮克氏针
三叶草钢板
内固定
肱骨近端
骨折
Biomechanics
Cannulated compression screws （CCS）
Percutaneous pinning （PP）
Cloverleaf plate （CP）
Internal fixation
Proximal humeral
Fractures
