金属_____枕颈融合;_脊柱生物力学;

金属框架固定行枕颈融合术的生物力学研究

http://www.100md.com 《中国矫形外科杂志》 2006年第2期

金属,,枕颈融合;,脊柱生物力学;,内固定;,金属框架;,寰枢椎不稳,1材料与方法,2结果,3讨论,参考文献：

     摘要：[目的]评价金属框架重建枕颈部的稳定性，为其临床应用提供力学依据。[方法]在7具完整成人枕骨颈椎(C0～6 )标本上对横韧带切除齿状突切骨后失稳的C0～2节段，分别安装金属框架和棘突枕颈钢板内固定，通过摄像将153 Nm载荷下的三维运动记录脊柱三维运动稳定性评价方法，评价其重建枕颈部即时稳定性的效果。[结果]在153 Nm载荷作用下，金属框架组C0～2节段的前屈、后伸、侧弯和轴向旋转的ROM分别为59°、77°、56°、112°，比棘突枕颈钢板组分别缩小了1576%、688%、589%、1313%。[结论]枕颈框架组较有效地恢复枕颈部失稳后的即时稳定性，是枕颈融合术中较可靠的内固定方法。

    关键词：枕颈融合; 脊柱生物力学; 内固定; 金属框架; 寰枢椎不稳

    Biomechanical study on occipitocervical fusion fixed by metallicrectangular frame

    XIAO Zengming,TANG Shujin,WEN Jieming.

    Department of Orthopaedics,the First Affiliated Hospital of Guangxi Medical University,Nanning 530021

    Abstract：[Objective]To provide the mechanical evidence of self manufactured metallicrectangular frame on the reconstruction of the stability of occipitocervical junction.[Method]Seven of the adult cervical spinal specimens which were entire wet-cadavers(from occipitale to C6) were made to simulate the C0～2 fracture dislocation. These of specimens dislocated were fixed by metallicrectangular frame and Occipitocervical plate respectively.The three dimensional movements of C0～2 were recorded through photogrametry with a pure moment of 1.53 Nm. The range of motion(ROM) of each specimens in two fixation was caculated.[Result]Loaded by 1.53Nm, In metallicrectangular frame fixation, the ROM in flexion, extension, lateral bending and axial rotation were 5.9°、7.7°、5.6°、11.2° respectively, decreased by 157.6%、68.8%、58.9%、131.3%, compared with occipitocervical plate fixation group.[Conclusion]Metallicretangular frame fixation can reconstruct the stability of Occipitocervical junction immediatey, and is a relativity effective internal fixation for occipitocervical fusion. ......

百拇医药网 http://www.100md.com/html/DirDu/2006/03/23/95/77/46.htm

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