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Journal of Korean Neurosurgical Society 2007;42(3): 179-183.
Posterior Atlantoaxial Transarticular Screw Fixation.
Byung Su Ko, Jung Kil Lee, Yeon Seong Kim, Sung Jun Moon, Jae Hyoo Kim, Soo Han Kim
Department of Neurosurgery, Chonnam National University Hospital, Medical School, Gwangju, Korea. jkl@chonnam.ac.kr
Posterior arthrodesis in atlantoaxial instability has been performed using various posterior C1-2 wiring techniques. Recently, transarticular screw fixation (TASF) technique was introduced to achieve significant immediate stability of the C1-2 joint complex. The purpose of this study is to assess the clinical outcomes associated with posterior C1-2 TASF for the patient of atlantoaxial instability.
We retrospectively reviewed data obtained from 17 patients who underwent C1-2 TASF and supplemented Posterior wiring technique (PWT) with graft between 1994 and 2005. There were 8 men and 9 women with a mean age of 43.5 years (range, 12-65 years). An average follow-up was 26 months (range, 15-108 months).
Successful fusions were achieved in 16 of 17 (94%). The pain was improved markedly (3 patients) or resolved completely (14 patients). There was no case of neurological deterioration, hypoglossal nerve injury, or vertebral artery injury. Progression of spinal deformity, screw pullout or breakage, and neurological or vascular complications did not occur.
The C1-2 TASF with supplemental wiring provided a high fusion rate. Our result demonstrates that C1-2 TASF supplemented by PWT is a safe and effective procedure for atlantoaxial instability. Preoperative evaluation and planning is mandatory for optimal safety.
Key Words: Atlantoaxial; Instability; Posterior fusion; Transarticular screw
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