Analysis on the rotatable stability of slipping prophase lumbar spondylolysis when motion of flexion and extension
JIANG Huan-Chang, WANG Ji-Xin, CHANG Beng
Chinese Journal of Clinical Anatomy ›› 2015, Vol. 33 ›› Issue (1) : 105-107.
Analysis on the rotatable stability of slipping prophase lumbar spondylolysis when motion of flexion and extension
Objective To analyse the lumbar static and dynamic sagittal rotatable stability of patients with bilateral slipping prophase lumbar spondylolysis. Methods The lumbar X-ray of 55 patients with bilateral slipping prophase lumbar spondylolysis was analyzed. On the lateral X-ray radiography of the lumbar spine under the conditions of static and hyperflexion-hyperextension, the intervertebral disc angles of L4/5 or L5/S1 with spondylolysis were measured. The differences between the hyperflexion and hyperextension intervertebral disc angles were calculated. A randomized controlled study was performed between persons underwent physical check-ups and patients. the statistical analysis was performed. Results Intervertebral disc angles were not statistically different between patients with bilateral slipping prophase lumbar spondylolysis and persons underwent physical check-upson static and hyperextension lumbar lateral X-ray（P>0.05）. On lateral X-rayradiography under the condition of hyperflexion, the intervertebral disc angle was statistically different between them（P＜0.05）. The difference of intervertebral disc angle on lateral X-ray radiography under the conditions of hyperextension and hyperflexion was statistically significant（P＜0.05）. Conclusion Dynamic sagittal rotatable instability exists on bilateral slipping prophase lumbar spondylolysis undergoing motion of flexion and extension. Surgical intervention needs to be provided as soon as possible
Lumbar spondylolysis / Slipping prophase / Lumbar instability
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