Cervical Spine Interbody Fusion Titanium Expandable Cage

Intended Use

• Degenerative Disc Disease (DDD) with instability
• Failed previous cervical fusion
• Post-discectomy/corpectomy reconstruction
• Kyphotic deformity correction (± posterior fixation)
• Revision of cervical arthroplasty

Clinical Advantages

1. Dynamic Height Adjustment:
   • Real-time expansion in-situ (after implant insertion) to optimize disc height/lordotic angle.
   • Reduces endplate stress vs. static over-distraction.
2. Integrated Fixation:
   • Self-anchoring teeth/spikes resist migration (<0.8% subsidence risk per literature).
   • Expandable fins/struts engage vertebral endplates.
3. Surgical Efficiency:
   • Single-step procedure eliminates trial spacers/cage stacking.
   • Compatible with MIS techniques (15–18mm tubular retractors).
4. Biomechanical Integrity:
   • Titanium modulus (110 GPa) supports immediate load-sharing.
   • Plasma-sprayed porosity enables 70%+ bone-implant contact.
5. Complication Mitigation:
   • Monolithic design prevents component disassembly (cf. screw-based systems).
   • No posterior overhang → reduces dysphagia risk.

Contraindications

• Absolute:
  • Active systemic/local infection (e.g., osteomyelitis)
  • Severe osteoporosis (T-score <−3.5) or metabolic bone disease
  • Allergy to titanium/alloy components
• Relative:
  • Prior radiation at surgical site
  • Multi-level fusions without supplemental instrumentation
  • Instability requiring posterior fixation (Note: standalone use limited to 1-level ACDF)
  • BMI ≥40 (↑ mechanical failure risk)

Warnings & Precautions

CAUTION: Deployment forces exceeding 200N may fracture endplates. Verify adequate bone stock pre-expansion. Over-distraction >3mm above native disc height may cause radiculopathy. Radiolucent driver required for intraoperative imaging.