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The feasibility of transpedicular screw fixation of the subaxial cervical spine in the Arab population: a computed
Osama Al-Saeed1,2, Yousef Marwan3, Osama Rabie Kombar4,5
1Department of Radiology, Faculty of Medicine, Health Sciences Center, Kuwait University, PO Box 24923, Safat, 13110, Kuwait City, Kuwait. osamas@hsc.edu.kw.
Background:
Transpedicular screw fixation of the cervical spine provides excellent biomechanical stability. The feasibility of inserting a 3.5-mm screw in the pedicle requires a minimum pedicle diameter of 4.5 mm. This diameter allows at least 0.5 mm bony bridge medially and laterally in order to avoid pedicle violation which can result in neurovascular complications. We aim to evaluate the feasibility of this technique in Arab people since no data are available about this population.
Materials And Methods:
This cross-sectional study involved a retrospective review of computed tomography scans of normal cervical spines of 99 Arab adults. Ten morphometric measurements were obtained. Data were analyzed using a p value of ≤0.05 as the cut-off level of statistical significance.
Results:
Our sample included 63 (63.6 %) males and 36 (36.4 %) females, with a mean age of 35.5 ± 16.5 years. The morphometric parameters of C3-C7 spine pedicles were larger in males than in females. The outer pedicle width (OPW) was <4.5 mm in >25 % of all subjects at C3-C6 vertebrae. Statistically significant differences in the OPW between males and females were noted at C3 (p = 0.032) and C6 (p = 0.004).
Conclusions:
Inserting pedicle screws in the subaxial cervical spine is feasible among the majority of Arab people.
Level Of Evidence:
Level 3.
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