XEN-21 Spine System highly emphasizes   on its biocompatibility as it comes in medical grade titanium alloy   Ti-6Al-4V ELI. XEN-21 system utilizes a low profile design that   incorporates anatomic hooks, polyaxial screws, and a dual closure   mechanism. The load sharing design of the 5 mm titanium rod allows for   proper tension bend principle to be applied when used with proper   anterior column support.

The system addresses a wide range of indications in spine surgery including: 

• Spondylolisthesis
• Spine trauma
• Degenerative Disc Disease 
• Reconstruction surgery in tumor and infection
 
• Correction of Spinal Deformities 

• Posterior or Anterior use with the same Implant components and Instrumentation.
 
• Screws available in Monoaxial and Polyaxial versions with buttress threads and tapered core diameter for better strength. 
 
• Reduction Screw with uniquely designed tabs permit controlled reduction of the spine.
 
• No bulky instruments required, increasing tactile feel and permitting direct visualization during procedure.
 
• Anatomic Hooks are specifically designed to ensure the best fit available.
 
• The Delivery system (Cases and trays) designed to make the system more user friendly.  
 
• Direct   Anchor Attachment- Rod is attached to screw or hook directly in line.   This minimizes the moment arm and profile, and increases the strength.
 
• Dual   Closure-positive expansion lock is most secure mechanism in the market.   The system provides multiple points of contact on the rod.
 
• Closure mechanism provides footprint to apply enough torque to assure rod is seated in the implant.
 
• Universal anchor attachment- All components utilize the same attachment to the rod, minimizing confusion and time.
 
• Monoaxial and Polyaxial screws available in diameters 5.3mm & 6.0mm with lengths 30mm-50mm
 
• Spondylolisthesis reduction screws available in diameters 5.3mm & 6.0mm with lengths 30mm-50mm
 
• 5.0mm diameter Rods in lengths 50mm-400mm
 
• Cross-link assembly
 
• Staple washer for anterior fixation
 
• Hooks-Pedicle; Supralaminar & Infralaminar