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The Feasibility Study of Resecting the Anterior Arch of Atlas Andodontoid of Axis 、Anterior C1-2 Transarticular Facet Screw Fixation Simultaneously

Author: LiChunYan
Tutor: LeiGangGang
School: Jiangxi Medical College
Course: Orthopedics
Keywords: Anterior atlantoaxial facet screw fixation Anatomy Stiffness
CLC: R687.3
Type: Master's thesis
Year: 2005
Downloads: 23
Quote: 0
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Abstract


Objective: Research Phase I Road anterior arch of atlas and odontoid resection, Applied anatomy and biomechanics of the feasibility of atlantoaxial facet screw fixation . Methods : ① : 40 sets of Chinese adults by conventional anti-corrosion of the formalin fixed atlantoaxial vertebral specimens clinically significant data anatomical measurements , measure , including the midpoint of the articular surface of the longitudinal diameter atlas transverse ; atlas under the midpoint of the articular surface of the longitudinal diameter , transverse diameter ; axial midpoint of the articular surface of the longitudinal diameter , transverse diameter ; to both sides of the edge of the transverse diameter of the lower end of the axial midpoint , the midpoint of the lower end of the axial longitudinal diameter ; atlas ago arch width ; odontoid width at the bottom . ②: randomly selected 12 sets of specimens of different surgical methods fixed specimens were divided into two groups : group A : I anterior anterior arch of atlas and odontoid resection , atlantoaxial joint screws ; B group : posterior Brooks Act wire fixation . By in vitro biomechanical experiments , fixed atlantoaxial specimens before and after the cut, after the former crop, rotate rigidity test and compare each other's differences . Results : ( 1 ) : anatomical results : atlas on the midpoint of the articular surface of the longitudinal diameter : 20.57 ± 1.35mm , atlas midpoint of the articular surface diameter : 10.09 ± 1.31mm , atlas midpoint of the articular surface of the longitudinal diameter : 13.35 ± 1.50mm , atlas under the midpoint of the articular surface diameter : 12.89 ± 1.24mm axial midpoint of the articular surface of the longitudinal diameter : 13.56 ± 1.50mm , the axial midpoint of the articular surface diameter : 13.17 ± 1.77mm , atlantoaxial the lower end of the mid-point to the edge on both sides of the transverse diameter : 11.06 ± 1.43 mm axial midpoint of the lower end of the vertical diameter : 10.85 ± 1.18mm , the anterior arch of atlas width : 18.69 ± 2.28mm, the bottom of the odontoid width : 10.3 ± 1.45mm . ②: biomechanical results : Phase I Road anterior arch of atlas and odontoid resection, screw fixation of the atlantoaxial joint before and after shearing , after the former crop, rotate stiffness were 473 ± 66N/mm 478 ± 68N / mm, 1.7 ± 0.3Nm / °. Posterior Brooks method wire fixation before and after shearing , after the former crop, rotate stiffness were 278 ± 41N/mm , 445 ± 86N/mm , 0.3 ± 0.1 Nm / ° .

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CLC: > Medicine, health > Surgery > Orthopaedic Surgery ( movement system diseases,orthopedic surgery ) > Orthopedic surgery and surgery > Bone surgery
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