颈椎单开门OsteoMed M3钉板内固定椎管扩大成形术螺钉不同角度固定的拔出实验  

Pullout test in expansive unilateral open-door laminoplasty of the cervical spine with OsteoMed M3 plate and screws:the screw orientation matters

作　　者：胡孔和[1] 靳安民[1] 段扬[1] 刘成龙[1] 闵少雄[1] 朱立新[1] 赵卫东[2] 

机构地区：[1]南方医科大学珠江医院骨科,广东广州510282 [2]南方医科大学医学生物力学重点实验室,广东广州510515

出　　处：《南方医科大学学报》2011年第5期911-913,共3页Journal of Southern Medical University

基　　金：广东省医学科研基金(A2009678)

摘　　要：目的研究在颈椎单开门OsteoMed M3钉板内固定椎管扩大成形术中螺钉不同角度固定的拔出力大小。方法 6具颈椎标本随机编号分别行后路单开门OsteoMed M3钉板内固定,在关节突关节侧行螺钉固定时按序按组分别采用螺钉固定角度垂直于侧块皮质0°、外倾30°及外倾45°位组,使用ElectroForce测试仪测试螺钉的最大拔出力。结果外倾0°组、30°组和45°组最大拔出阻力平均为(81.60±7.33)N、(150.05±15.57)N和(160.08±17.77)N。外倾0°组拔出力小于外倾30°及外倾45°位组(P<0.05),而外倾30°及外倾45°位组之间拔出力无统计学差异(P>0.05)。结论颈椎单开门OsteoMedM3钉板内固定椎管扩大成形术中螺钉外倾30°以上角度固定抗拔出能力高。Objective To study the impact of screw orientation on the pullout strength of OsteoMed M3 titanium screws in expansive unilateral open-door laminoplasty of the cervical spine. Methods Six fresh human cervical spine specimens were randomly numbered and OsteoMed M3 plate and screws were used for an expansive unilateral open-door laminoplasty. The screws were inserted in the lateral mass at different extraversion angles（0°,30° and 45°） . The maxinum pullout strength was tested on the ElectroForce material testing machine. Results The maxinum pullout strength was 81.60±7.33 N,150.05±15.57 N,and 160.08±17.77 N in extraversion angle 0°,30°,and 45° groups,respectively. The maxinum pullout strength was significantly less in extraversion angle 0° group than in 30° and 45°groups（P0.05） ,but similar in the latter two groups. Conclusion The pullout strength of the screws inserted at an extraversion angle over 30° provides stronger fixation than an angle of 0° in the unilateral open-door laminoplasty using OsteoMed M3 titanium plate and screws.

关 键 词：颈椎 OsteoMed M3 椎管扩大成形术 内固定 拔出实验 

分 类 号：R687.3[医药卫生—骨科学]