克氏针固定锁骨的生物力学试验和临床疗效

Internal Fixation with Kirschner’s Pin for theClavicular Fracture──A Clinical Report andBiomechanical Study

作者自１９８５年３月至１９９２年１２月，采用克氏针内固定治疗锁骨骨折１５２例。随访时间：６～７０个月，平均３６．８个月。随访结果：无切口感染，无骨不连及延愈合。优１０６例，良３６例，尚可６例，差４例，优良率９３％。我们采用６具新鲜尸体锁骨进行对比性生物力学试验；结果显示用２ｍｍ克氏针固定的锁骨抗弯强度δ＿ｂ５４．３Ｎ／ｍｍ￣２，抗剪切强度Ｌ＿ｂ２２４Ｎ／ｍｍ￣２，抗扭转强度Ｍ４０．７３Ｎ／ｍｍ￣２。证实了２ｍｍ克氏针固定锁骨，符合生物力学要求，促进了骨折愈合，是目前治疗锁骨骨折的理想方法之一。

Abstract152 cases of clavicular fracture had heen treat-ed by internal fixation with Kirschner’s pin fromMarch, 1985 to December 1992.No external fixa-tion was applied. Time of follow up was from 6months to 70 months,average 36.8 months.The postoperative result was excellent in 106 cases,good 36 cases, fair 6 cases and poor 4 cases:nowound infection,no bonv non-union nor delavedunion. We have performed biomechanical studywith6fresh cadaver clavicles. After the artificialfracture of these 6. internal fixation withKirschner’s pin was applied for each.The experi-mental result showed that bearing force of thebending was 54.3N/mm￣2, of the shearing was 224N/mm￣2 and of the torsion was 40.73N/mm￣2.Allthese can fulfill the requirement of biomechanicsand accelerate the bonv union, So internal fixationwith Kirschner’s pin is one of theHeal methods forthe treatment of clavicular fracture.