摘要
目的：明确齿状突Ⅱ型骨折后枕颈部生物力学的变化规律对选择治疗方法具有重要的指导作用。方法：采用１１具新鲜尸体的枕颈部骨韧带标本，应用脊柱三维运动测量及分析系统，对标本施加１．５３Ｎ，ｍ的纯力偶矩，定量测定齿状突Ⅱ型骨折前后的枕颈部三维运动范围。结果：齿状突Ⅱ型骨折后，枕颈部三维运动范围有显著性增加的主要表现在寰枢关节；寰枢关节的旋转运动、前屈运动及屈伸，侧屈主运动时的耦合旋转运动范围显著增加。
Beware of three-dimensional motion change on Occipito-atlanto-axial joint complex following the fractures of the dens is very important for selecting treatment methods.The purnose of this in vitro study was to quantitatively determine e three-dimensional motions of the Occiputo-C:and C1-C2 oints.Eleven Occipito-atlanto-axial complex of fresh cadaveric specunen were studied,using the three-dimensional spinal montion measure and analysis system to document their physiological three-dimensional six degree of freedom rotation movements.An osteotomy at the base of the dens was performed.Pure movements of a maximum of 1.53N.m were applied,each movement was applied individually and in three load/unload cycles. Parameters of neutral zone,elastic zone and range of motion were computed.We found that their ranges of three-dimensional rotation and their neutral zones increased at different degrees after the dens fractured,and so did their coupling motion;but only were ranges of the main motion for left/right axial rotation and fiexion significantly increased,and coupling rotation motion when accompanied with main motion of flexion/extension and left/right lateral bending.
出处
《医用生物力学》
CAS
CSCD
1996年第1期38-41,46,共5页
Journal of Medical Biomechanics
关键词
齿状突
骨折
枕颈部
生物力学
dens,three-dimensional motioon,analysis,biomechanics,occipito-atlanto-axial
