Abstract: Objective To investigate the effect of vertebral body size on axial syndrome(AS) after posterior cervical open-door laminoplasty.
Methods A total of 40 patients underwent posterior cervical single-door decompression surgery completed by the same professional group.Patients were divided into groups A and B according to the size of the vertebral body,The group A,11 patients,was the small vertebral body group.The group B,29 patients,was the non-small vertebral body group.They were recorded operation time and the incidence and duration of axial symptoms to assess the effect of vertebral body size on the incidence of axial symptoms after single-door surgery.
Results There wasn’t statistically significant difference in the operative time and intraoperative blood loss between the two groups(P>0.05).Among the two groups,the prevalence of axial symptoms in group A was 63.6%.The prevalence of axial symptoms in group B was 27.6%.The difference between the two groups was statistically significant(P<0.05).In the reexamination 3 months after surgery,there were 6 patients in group A and 3 patients in group B which still had axial symptoms,the persistent prevalence rate of A was 54.5% and B was 10.3%.The data of the two groups were statistically significant(P<0.05).In the reexamination 1 year after surgery,there were 3 patients in group A and 1 patients in group B which still had axial symptoms,〖JP2〗the persistent prevalence rate of A was 27.3％ and B was 3.4％.The data of the two groups were statistically significant(P<0.05).
Conclusion Patients in the small vertebral body group are more likely to have axial symptoms after surgery,and early and late axial symptomatic persistence have a higher rate.

Key words: posterior cervical open-door laminoplasty, vertebral body size, axial syndrome