Effectiveness and Safety of Mobile Artificial Cervical Vertebrae Replacement for Patients With Cervical Spondylosis

Inclusion Criteria: * (1)Age: 18-70 years, irrespective of sex; * (2)For mobile artificial cervical vertebrae replacement, patients with cervical spondylosis who are planned to undergo anterior cervical corpectomy and resection of two adjacent intervertebral discs; * (3)For anterior cervical corpectomy and fusion, patients with cervical spondylosis who are planned to undergo anterior cervical corpectomy and resection of two adjacent intervertebral discs; Exclusion Criteria: * (1) Patients who have participated in other clinical studies 3 months before the inception of the study; * (2) Abnormalities in liver and kidney functions (aspartate aminotransferase, alanine aminotransferase, blood creatinine and urea nitrogen levels are 1.5 times higher than normal); * (3) Obvious abnormalities in the blood system; * (4) Abuse of drugs or ethanol; * (5) Patients who have brain disorders, abnormal judging ability, or cannot cooperate with the observer; * (6) Coronary heart disease or severe kidney disease; * (7) Severe metabolic diseases and endocrine diseases that are out of drug control; * (8) Pregnant and lactating women and couples who are about to become pregnant in the near future; * (9) Severe lung diseases such as asthma and lung dysfunction; * (10) Immunodeficiency; * (11) Single-segment intervertebral disc herniation or compression; * (12) 3 or more vertebral segments herniated or spinal cord compression due to ligament ossification; * (13) Active infection (systemic or loc…