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  • Title: Motion preservation in type II odontoid fractures using temporary pedicle screw fixation: a preliminary study.
    Author: Han B, Li F, Chen G, Li H, Chen Q.
    Journal: Eur Spine J; 2015 Apr; 24(4):686-93. PubMed ID: 25543916.
    Abstract:
    PURPOSE: To assess the feasibility of temporary pedicle screw fixation for motion preservation of type II odontoid fractures unsuitable for anterior screw. METHODS: Between 2012 and 2013, temporary pedicle screw fixation was performed in 13 patients with type II odontoid fractures unsuitable for anterior screw. The patients were 10 men and 3 women with an average age of 40. The implant was removed after fracture union. Dynamic CT was performed ≥ 1 month after implant removal to evaluate atlantoaxial rotation and axial neck rotation. Literature data on axial neck rotation were obtained as a historical control. RESULTS: Fifty-two pedicle screws were placed successfully with satisfactory fracture reduction achieved in all patients. The average follow-up period was 14.2 months. At a mean of 9 months after the initial operation, fracture union was confirmed and implants were removed. The average total axial neck rotation was 116.5° ± 25.8° (78.2 ± 14.8 % of the historical controls). The average total atlantoaxial rotation was 34.2° ± 22.0° (27.3 ± 13.8 % of total axial neck rotation). CONCLUSIONS: Temporary pedicle screw fixation is a feasible technique for motion preservation of type II odontoid fractures unsuitable for anterior screw.
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