◆ Reliable locking mechanism, convenient and easy to use, effectively reducing the risk of screw withdrawal
◆ Excellent screw angulation range
◆ Two types of screws to choose from: set screw and variable-angle screw
◆ Congenital cervical vertebra malformation
◆ Degenerative disease of cervical vertebra
◆ Cervical vertebra instability due to cervical vertebra trauma, vertebral body resection and fracture dislocation
◆ Reconstruction after surgery for cervical vertebra tumor, tuberculosis, and infectious disease elimination
◆ Acute infection, gestation, metabolic disorder of calcified tissues and severe osteoporosis
◆ Local infection at implant site
◆ Spinal stenosis of multiple segments of cervical vertebra
◆ Compression from cervical syndrome or bone fracture posterior to spinal marrow
◆ Drug abuse, mental disease, general neurological disease, and immune suppression disorder
◆ Allergy to metals
◆ Patients are unwilling to restrict activity or disobey medical advice