Management of Unilateral Cervical Facet Dislocation
Surgical treatment is strongly recommended over nonoperative management for unilateral cervical facet dislocation, as treatment failure, neurological deterioration, and persistent pain occur significantly more frequently with nonoperative approaches. 1
Initial Stabilization and Assessment
Immediate spinal immobilization is essential to prevent onset or worsening of neurological deficits in any patient with suspected cervical spine injury. 2
- Apply rigid cervical collar with manual in-line stabilization during any patient movement or airway intervention 2, 3
- If intubation is required, use manual in-line stabilization with removal of the anterior collar portion to facilitate glottic exposure 2, 3
- Maintain cervical spine in neutral axis without Sellick maneuver during airway management 2, 3
Diagnostic Imaging
Obtain high-resolution CT scan (1.5-2mm slices) with sagittal reconstructions of the entire cervical spine as the primary diagnostic modality. 4
- MRI is recommended by 65% of Latin American spine surgeons to assess for disc herniation and ligamentous injury before definitive treatment 5
- The presence of anterior disc herniation significantly influences surgical approach selection 5
Surgical Approach Selection
For Acute Injuries Without Disc Herniation:
Either anterior-only or posterior-only approaches are acceptable, with choice based on surgeon expertise and institutional resources. 1, 5
- Anterior approach (29% preference): Anterior cervical discectomy, reduction, fusion with plate fixation 6, 7, 8
- Posterior approach (44% preference): Direct visualization and reduction of locked facets with posterior instrumentation 5
For Injuries With Anterior Disc Herniation:
An anterior or combined approach is strongly preferred (89% combined preference) rather than isolated posterior surgery. 5
- Anterior approach allows direct disc removal and neural decompression 6, 8
- Combined approach provides both anterior decompression and posterior stabilization when needed 5
For Delayed Presentation (>7-21 days):
Combined or anterior-only approaches are preferred, with isolated anterior approaches decreasing from 29% to 15% in late injuries. 9, 5
- Anterior pedicle spreader technique can achieve reduction when standard vertebral distraction fails 9
- Consider combined approach for increased stability in chronic dislocations 5
Anterior Reduction Techniques
When performing anterior-only reduction, use the following algorithmic approach:
Step 1: Standard anterior discectomy beyond the posterior longitudinal ligament 7, 8
Step 2: Attempt kyphotic paramedian distraction using Caspar pins as "joysticks" with interlaminar distractor:
- Success rate: 82% (52/63 patients) 7
- Apply flexion-extension or lateral rotation moments to unlock facets 8
Step 3: If distraction fails, perform anterior facetectomy with anterior cervical pedicle screw plate fixation:
- Success rate: 100% in distraction failures (11/11 patients) 7
- Insert pedicle spreader along pedicle axis under fluoroscopy, distract facet joint directly 9
Step 4: Fixation with anterior cervical locking plate and interbody fusion 6, 7, 8
Outcomes and Safety
Anterior-only reduction achieves:
- 90.2% good-to-excellent outcomes at mean 12.4-year follow-up 6
- Successful reduction in 100% of cases using staged techniques 7
- No neurological deterioration when properly executed 6, 7, 8
- Supplemental posterior surgery required in only 3-5% of cases 6, 7
Nonoperative management results in:
- Higher treatment failure rates 1
- More frequent neurological deterioration 1
- Increased persistent pain 1
- Patients requiring delayed surgery after failed conservative treatment still achieve better outcomes than continued nonoperative management 1
Critical Pitfalls to Avoid
- Do not attempt prolonged nonoperative management beyond 48-72 hours in patients unlikely to become clinically evaluable, as this increases complication risks without benefit 4, 1
- Do not perform isolated posterior approach when anterior disc herniation is present, as this leaves neural compression unaddressed 5
- Do not proceed with anterior reduction without adequate discectomy beyond the posterior longitudinal ligament, as this prevents adequate distraction 7, 8
- Avoid excessive traction force during closed reduction attempts, as this may worsen neurological injury 2
Timing of Surgery
Early surgical intervention is preferred once imaging is complete and the patient is medically stable, though specific timing thresholds lack high-quality evidence. 10, 5