Department of Pediatric Surgery West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China;
Department of Orthopedics West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China;
Department of Radiology West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China;
Department of Orthopedics West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China;
Dynamic cervical implant; Cervical arthroplasty; Cervical disc degeneration; Clinical outcomes; Radiological outcomes; Range of motion;