新型微创髓内系统与解剖钢板固定尺骨鹰嘴骨折的生物力学比较研究  

A novel minimally invasive intramedullary system versus the anatomical plate for fixation of olecranon fractures:Comparison of the biomechanical effect

作　　者：费林聪 梁成 覃小帅 叶俊武 Fei Lincong;Liang Cheng;Qin Xiaoshuai;Ye Junwu(Department of Bone and Joint Surgery,Affiliated Hospital of Southwest Medical University,Luzhou,Sichuan 646000,China)

机构地区：[1]西南医科大学附属医院骨与关节外科,四川泸州646000

出　　处：《创伤外科杂志》2023年第5期341-345,共5页Journal of Traumatic Surgery

摘　　要：目的利用自主研制新型微创髓内系统固定尺骨鹰嘴骨折,与传统解剖钢板进行生物力学比较,为临床应用奠定实验基础。方法取10具共20侧尺骨尸体标本,其中男性7人,女性3人;死亡年龄45~72岁,平均62.0岁。制备尺骨鹰嘴横型骨折模型,分A、B两组,A组使用新型微创髓内固定系统进行固定;B组选用尺骨鹰嘴解剖钢板进行固定。对两组标本进行四点弯曲实验及扭转实验,传感器记录弯曲实验中的位移值及扭转实验中的扭矩值。结果四点弯曲试验中,A组位移值(1.114±0.040)mm,B组位移值(1.140±0.031)mm,两组比较差异无统计学意义(P=0.057)。扭转实验中,A组扭矩值(0.851±0.035)N,B组扭矩值(0.894±0.040)N,两组比较差异有统计学意义(P<0.05)。结论新型微创髓内系统在固定尺骨鹰嘴横型骨折中,具有优良的抗弯曲及抗扭转能力,固定牢靠,生物力学性能可以满足尺骨鹰嘴骨折微创固定需求。Objective To compare the biomechanical effect between a new self-designed minimally invasive intramedullary system with the traditional anatomical plate in fixation of olecranon fractures.Methods Ten cadaveric specimens with 20 ulnae were sampled to develop olecranon oblique fracture models,including 7 males and 3 females with the mean age of death being 62.0 years(range 45-72 years).The specimens were divided into two groups with 10 ulnae in each.In group A,the new minimally invasive intramedullary system was adopted to fix olecranon fractures,while in group B the olecranon anatomical plate was used.For all the specimens,the four-point bending test and torsion test were performed;the displacement in the bending test and the torque in the torsion test were recorded by a sensor.Results The four-point bending test showed a displacement of(1.114±0.040)mm in group A and(1.140±0.031)mm in group B,revealing no significant difference(P=0.057).However,the torsion test showed a significantly lower torque in group A than in group B(N,0.851±0.035 vs.0.894±0.040),P<0.05.Conclusion The new minimally invasive intramedullary system has comparable anti-bending and better anti-torsion ability for fixation of olecranon fractures than the conventional anatomical plate,thus can achieve rigid and reliable fixation.

关 键 词：尺骨鹰嘴骨折 微创髓内系统 解剖钢板 生物力学 

分 类 号：R683.41[医药卫生—骨科学]