The difference of axial pain between patients accepting C3-C7 or C3-C6 one-door-open laminoplasty

English Keywords:Axial pain  One-door-open laminoplasty

English Abstract:

  【Abstract】 Objectives: To decide whether the preservation of C7 lamina, spinous process, and accessory muscles can reduce the incidence of axial pain after one-door-open laminoplasty. Methods: 53 patients who underwent the modified laminoplasty with mini-plate from April 2010 to April 2011 in our hospital were included and divided into 2 groups according to the laminas that lifted from C3 to C6(group A, 26 cases) or from C3 to C7(group B, 27 cases). The follow-up JOA score and cervical range of motion(ROM) were compared between 2 groups. 53 patients were surveyed by clinic visit or telephone connection to ensure whether they got axial pain(AP), and to record the initial severity grade, VAS score, the onset and the duration for complete remission. Then these data were analyzed to find out the differences between 2 groups. Results: There were no significant differences in JOA score, neurologic recovery rate(NR), cervical ROM and change of ROM between 2 groups at 1 year follow-up(P>0.05). The AP incidence rate in group A was 30.7%(8/26), including 5 mild and 3 moderate of AP grade; the axial pain incidence rate in group B was 33.3%(9/27), including 4 mild, 4 moderate and 1 severe of AP grade. There was no significant difference between two groups(P>0.05). The VAS between 2 groups was significantly different, with value 3.0 in group A and 4.4 in group B(P<0.05). The onset of pain and complete remission in group A was 57.3 days and 99.1 days separately, and 25.4 days and 165.9 days in group B, with both significant differences(P<0.05). Conclusions: The preservation of C7 lamina, spinous process and its accessory muscles does not influence the recovery of neural function, reservation of cervical range of motion and incidence of axial pain. And it can reduce the initial VAS score, delay the onset, decrease the duration of pain process, and improve the life quality of patients. 【Key words】 Axial pain; One-door-open laminoplasty