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Translaminar screw fixation of the cervical spine in Asian population: feasibility and safety consideration based on computerized tomographic measurements

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Abstract

Purpose

Cervical translaminar screw fixation has been shown to be safe, efficient and provides alternative for cervical fixation. However, its use in the Asian population should be considered cautiously because the cervical lamina diameter may not be adequate to accommodate the standard lamina screw size. We studied the average transverse lamina diameter of the cervical spine in the Malaysian population to evaluate the feasibility and safety of lamina screw fixation in this population.

Methods

The measurements of the cervical lamina were performed on CT images. The diameters were defined as the most inner or outer diameter of the lamina, taken perpendicular to the axis of the lamina and measured in millimeters up to 0.1 mm.

Results

The mean transverse inner diameter of the lamina of C2, C3, C4, C5, C6 and C7 was 3.4, 2.0, 1.7, 1.9, 2.3 and 3.4 mm, respectively. The lamina of C2 and C7 has the largest transverse inner diameter and the lamina of C4 the smallest. The mean transverse outer diameter of the lamina of C2, C3, C4, C5, C6 and C7 was 5.6, 3.5, 3.1, 3.1, 3.9 and 5.8 mm, respectively. The lamina of C7 has the largest transverse outer diameter and the lamina of C4 and C5 the smallest.

Conclusions

Translaminar fixation using a 3.5 screw should be attempted with caution in Asian population. Pre-operative CT scan evaluation is mandatory before translaminar screw fixation is attempted.

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Acknowledgments

No funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.

Conflict of interest

There is no conflict of interest between the authors and other parties.

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Authors and Affiliations

  1. Spine Unit, Department of Orthopaedics, School of Medical Science, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia

    Mohd Imran Yusof & Samir Shamsi Mohammed Shamsi

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  1. Mohd Imran Yusof
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  2. Samir Shamsi Mohammed Shamsi
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Correspondence to Mohd Imran Yusof.

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Yusof, M.I., Shamsi, S.S.M. Translaminar screw fixation of the cervical spine in Asian population: feasibility and safety consideration based on computerized tomographic measurements. Surg Radiol Anat 34, 203–207 (2012). https://doi.org/10.1007/s00276-011-0869-8

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  • DOI: https://doi.org/10.1007/s00276-011-0869-8

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