A Gutbrod, F Longo, R Affentranger, S J Ferguson, A Pozzi, S C Knell
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引用次数: 0
摘要
目的:比较应用于猫胫骨间隙模型的三种板棒固定结构的刚度和强度。研究设计:离体研究。样本群体:33个未配对的胫骨,取自骨骼成熟的猫。方法:将胫骨随机分为三组。在产生10 mm骨干间隙。第1组:2.4 mm锁定压板(LCP)和1.0 mm髓内钉(IMP)。第2组:2.4 mm LCP和1.6 mm IMP.第3组:2.7 mm LCP。随后,对每个试样进行扭转、轴向压缩和轴向载荷测试,直到结构失效。学生t检验用于比较扭转和轴向刚度、屈服载荷和最大轴向力。结果:第2组的轴向刚度高于第3组(p = .013)。第1组的最大轴向力和屈服点低于第2组和第3组(p 结论:构建2.4 mm LCP和1.6 mm IMP在猫胫骨间隙模型中提供了最强和最刚性的结构。临床意义:一种结合2.4 mm LCP和1.6 mm IMP适用于在治疗猫胫骨骨折时实现高植入物刚度和抵抗最大轴向力。
Ex vivo biomechanical evaluation of 2.4 mm LCP plate rod constructs versus 2.7 mm LCP applied to the feline tibia.
Objective: To compare the stiffness and strength of three plate and rod fixation constructs applied to a feline tibial gap model.
Study design: Ex vivo study.
Sample population: Thirty-three unpaired tibiae obtained from skeletally mature cats.
Methods: The tibiae were randomly divided into three groups. The following implants were then applied to the feline tibiae prior to the creation of a 10 mm diaphyseal gap. Group 1: 2.4 mm locking compression plate (LCP) and 1.0 mm intramedullary pin (IMP). Group 2: 2.4 mm LCP and 1.6 mm IMP. Group 3: 2.7 mm LCP. Subsequently, each specimen was tested for torsion, axial compression, and axial load until construct failure. Student's t-tests were used to compare the torsional and axial stiffness, yield load, and maximum axial force.
Results: Group 2 had higher axial stiffness than group 3 (p = .013). Group 1 showed a lower maximum axial force and yield point than groups 2 and 3 (p < .01; p < .05, respectively). There were no among-group differences in torsional stiffness.
Conclusion: Constructs with a 2.4 mm LCP and 1.6 mm IMP provided the strongest and most rigid constructs in a feline tibia gap model.
Clinical significance: A plate-rod construct combining a 2.4 mm LCP and a 1.6 mm IMP is appropriate for achieving high implant stiffness and resisting maximum axial force in treatment of tibial fractures in cats.
期刊介绍:
Veterinary Surgery, the official publication of the American College of Veterinary Surgeons and European College of Veterinary Surgeons, is a source of up-to-date coverage of surgical and anesthetic management of animals, addressing significant problems in veterinary surgery with relevant case histories and observations.
It contains original, peer-reviewed articles that cover developments in veterinary surgery, and presents the most current review of the field, with timely articles on surgical techniques, diagnostic aims, care of infections, and advances in knowledge of metabolism as it affects the surgical patient. The journal places new developments in perspective, encompassing new concepts and peer commentary to help better understand and evaluate the surgical patient.