◆ Negative-angle thread locking is adopted for jackscrew and screw base to solve the problem of screw slippery
◆ Press-in sway bracing, low profile, convenient installation
◆ Lateral connecter solves problems such as difficulty in screw installation under nonlinear arrangement
◆ Local infection at implant site
◆ Generalizedmetastatic tumor, resulting in osteolytic defect of adjacent vertebral body◆ Drug abuse, mental disease, general neurological disease, and immune suppression disorder
◆ Allergy to metals
◆ Patients are unwilling to restrict activity or disobey medical advice