Clinical outcomes of Solis implantation for typeⅡ and Ⅱa Hangman′s fractures

English Keywords:Cervical vertebrae  Hangman′s fracture  Intervertebral fusion cage  Internal fixation

English Abstract:

  【Abstract】 Objectives： To investigate the clinical outcomes of Solis implantation for type Ⅱ and Ⅱa Hangman′s fractures. Methods： From January 2006 to November 2011, a total of 17 cases with type Ⅱ and Ⅱa Hangman′s fractures underwent anterior Solis placement. There were 11 males and 6 females, with the average age of 26.2 (range, 19-41). The reduction was achieved by distracting the intervertebral space and strengthening the tension of ligaments during operation. X-ray radiograph was taken at 1 week, 3 month, 6 months and final follow-up. The angular variation and translational displacement at pre-operative and final follow-up were recorded, and the clinical post-traumatic neck score as well as neck pain VAS score were recorded and analyzed. Results： The average operative time was 78min (55-135min) and blood loss was 22.5mL (10-50 mL). There was no surgical-related complication such as neurovascular or pharynx injury. No laryngeal edema, haematoma or infection was noted either. All patients were followedup for an average of 25.1 months (range 6-48 months), and the solid fusion was evidenced 3 months later, no cage related complications were observed. The clinical post-traumatic neck score (Mayo) was 48 (range 45-63) and 92 (range 83-97) for preoperation and final follow-up respectively; the neck pain VAS score was 6.9 (range 6-9) and 1.1 (range 0-2) for preoperation and final follow-up respectively; the angular variation was -8.6° (range -20-6°) and +3.5° (range 0-8°) for preoperation and final follow-up respectively; the translational displacement was 3.4 mm (range 1-5.5mm) and 1.2mm (range 0-2.0mm) for preoperation and final follow-up respectively. There were significant differences between the data of preoperation and final followup(P<0.05). Conclusions： The implantation of Solis for typeⅡ and Ⅱa Hangman′s fractures is feasible, simple and minimal invasive, which promises the stability of cervical spine.