Abstract: ［Abstract］Objective〖HTSS〗To analyze the short-term curative effect of expanded anterior cervical discectomy and fusion（ACDF） in the treatment of cervical spondylotic myelopathy.
Methods〖HTSS〗Clinical data of 138 cervical spondylotic myelopathy patients were retrospectively analyzed. All the patients were divided into expanding ACDF group(68 cases) and the traditional ACDF group(70 cases) according to different therapeutic methods. The duration of surgery, intraoperative blood loss, incidence of complications, Japanese Orthopaedic Association（JOA） score, intervertebral distraction index（IDI） and fusion rates were compared between two groups.
Results〖HTSS〗Operation time of group B was significantly shorter than group A(P＜0.05), and complication rate of group B was significantly shorter than group A(P＜0.05), but bleeding amount of two groups showed no significant difference(P＞0.05). The JOA score of expand ACDF was higher than that of traditional ACDF group（P＜0.05）. The IDI of the two group showed a reduce compare to immediately postoperative. IDI of group A were significantly greater than group B, both showed immediately postoperative and 3 months after（P＜0.05）. The fusion rate(P＜0.05) of group B was significantly superior to group A3 after 3 months.
Conclusion〖HTSS〗Endoscope-assisted expand ACDF surgery is a safe and effective surgery for the treatment of cervical spondylosis. This operation can enlarge the operative indications of anterior portion, improve the surgical curative effect, and can reduce the incidence of the axial symptoms.

Key words: cervical spondylosis, anterior cervical discectomy and fusion, microscopy