Morphometric measurement of the cervical spine for minimally invasive pedicle screw fixation using reverse engineering and three‐dimensional reconstruction

Zhou, Zi-Jia; Wen, Chaolun; Sun, Qin-Min; Wang, Aiping; Yan, Zheng‐Guang; Liu, Fang; Chen, Xi; Cao, Qi; Zhou, Xiaobing; Tan, Jing; Li, Yanbing

doi:10.1002/rcs.1765

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…22,27 Abumi 11,13 suggested that the optimum medial angle for PS placement should be 308 to 408 and the maximum angle range is 258 to 458. Zhou et al 34 measured the 3D reconstruction model of subaxial cervical CT scans and found that the medial angle for minimally invasive PS placement was 32.938 to 35.648, which is consistent with our results. According to the reports of Karaikovic, Panjabi, and Bozbuga 22,23,27 on the measurements of cervical pedicle, the width of each cervical pedicle at C3-C7 vertebrae is always smaller than its height.…”

Section: Screw Anglesupporting

confidence: 91%

Comparison of Morphometric Measurements of Traditional Posterior Cervical Screw and Paravertebral Foramen Screw in Chinese Population

Chen

Kalisi

et al. 2020

Spine

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Study Design. A morphometric measurement study. Objective. To measure the length and angle parameters of the screw paths of pedicle screws (PS), lateral mass screws (LMS), and paravertebral foramen screws (PVFS) of subaxial cervical spine in Chinese population. Summary of Background Data. Aramomi proposed a novel internal fixation technology, named PVFS, as an alternative to LMS and PS for subaxial cervical vertebrae (C3-C7). Methods. This study measured the length and medial angles of screw paths on the three-dimensional reconstruction model of cervical computerized tomography data of 50 patients (25 men and 25 women)

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Section: Screw Anglesupporting

confidence: 91%

Comparison of Morphometric Measurements of Traditional Posterior Cervical Screw and Paravertebral Foramen Screw in Chinese Population

Chen

Kalisi

et al. 2020

Spine

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“…It is also a transitional vertebra between the cervical vertebra and the thoracic vertebra [ 2 ]. In multisegmental fixation of the cervical spine, C7 is usually the most caudal point and the site of the highest concentration of stress [ 4 ]. Therefore, pedicle screw (PS) fixation is the optimal choice.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of pedicle screw implantation in the C7 vertebra using computed tomography-based three-dimensional models

et al. 2022

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Background From a biomechanical point of view, pedicle screws (PS) are better than other kinds of screws for implantation in the seventh cervical vertebra (C7). However, the application of PS is limited because of the high risk of severe complications. It is essential to define the optimal entry point and trajectory. The aim of this study was to comprehensively analyze the starting point and trajectory for C7 PS insertion using three dimensional (3D) models. Methods Overall, 60 subjects aged 18 to 67 years old were included. All CT images were used to construct 3D computer models of the C7 vertebrae. A new coordinate system was established for the next evaluation. The pedicle axis was calculated with respect to the entire pedicle; then, the ideal entry point, screw diameter and length, sagittal angle and lateral angle were assessed. Results All the ideal entry points were located at the medial superior to lateral notch (LN), and the mean distance between the entry point and LN was 5.86 ± 1.67 mm in the horizontal direction and 3.47 ± 1.57 mm in the vertical direction. The mean distance between the entry point and the middle point of the inferior edge of the C6 articular process (MP) was 0.74 ± 1.83 mm in the horizontal direction. The mean sagittal angle of the pedicle axis was 90.42°, and the mean pedicle transverse angle was 30.70°. The average diameter and length of the PS were 6.51 ± 0.76 mm and 31.58 ± 4.40 mm, respectively. Conclusions This study provided a novel method to calculate the ideal starting point and trajectory for C7 PS insertion. These measurements may be helpful for preoperative planning. It is recommended that 3D CT imaging is used preoperatively to carefully evaluate the anatomy of each individual.

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Morphometric measurement of the cervical spine for minimally invasive pedicle screw fixation using reverse engineering and three‐dimensional reconstruction

Cited by 2 publications

References 27 publications

Comparison of Morphometric Measurements of Traditional Posterior Cervical Screw and Paravertebral Foramen Screw in Chinese Population

Comparison of Morphometric Measurements of Traditional Posterior Cervical Screw and Paravertebral Foramen Screw in Chinese Population

Comprehensive analysis of pedicle screw implantation in the C7 vertebra using computed tomography-based three-dimensional models

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