Micro-CT has been widely used in osteology. Micro-computed tomography(Micro-CT), is a non-destructive, high-resolution imaging method developed recently, with resolution up to the micron level. Currently, most studies on lower cervical internal fixation have focused on its stability from the biomechanical point of view but less from the anatomical point of view of the vertebrae themselves 7, 8, 9.Ĭonventional computed tomography can detect early injury to the lower cervical spine but cannot observe the microstructure because of its low resolution. When the injury compresses the cervical cord or peripheral nerves, the clinical treatment is usually performed by internal fixation via screws to restore stability, including internal fixation via the pedicle, the articular process, or the vertebral plate 4, 5, 6. Due to changes in people's work and lifestyle, the incidence of cervical spine disorders is increasing and is gradually becoming younger 1, 2, 3. ![]() It is of great significance in maintaining the stability of the body's gravity center and reducing concussions. Cervical curvature supports the lifting of the head and increases the elasticity of the spine. If using pedicle screws, the nail tract needs to be placed into the spinous process to increase its holding power and resistance to extraction.Īs an essential structure to bear the head's weight, the lower cervical vertebra is the main spinal segment that causes the neck to protrude forward and form physiologic curvature. The anatomical microstructural perspective confirms that the optimal choice is internal fixation via the pedicle. There were no significant differences in trabecular bone thickness and trabecular space values among the four parts (P < 0.05). There was a significant difference in trabecular pattern factor values between the articular process, the spinous process, and the vertebral plate (P < 0.05) and a significant difference between the pedicle, the spinous process, and the vertebral plate (P < 0.05). There were substantial differences in BS/BV, except for no differences between the pedicle and the vertebral plate (P < 0.05). The statistical results of the trabeculae's morphological parameters showed significant differences in bone volume fraction values among the four parts (P < 0.05). ![]() The lamellar trabeculae of the vertebral plate extend over the spinous process near the cortical bone. The lamellar trabeculae in the vertebral plates near the cortical bones were only 1–2 layers, extended and transformed into rod-shaped trabeculae in a radial shape toward the medullary space. There were cavities between the superior and inferior articular processes where the ossification centers had not been absorbed after ossified. As a result, the images showed that the trabeculae in the lower cervical pedicle near the medial and lateral cortices were relatively dense, and their bone plates were lamellar. Each lamina forms part of the posterior roof of the vertebral arch.We will use micro-computed tomography to scan 31 sets of the adult lower cervical vertebrae (155 vertebrae) to observe the morphological characteristics and direction of trabeculae in the lower cervical vertebrae by outlining and reconstructing the regions of interest and to calculate the variation laws of the microstructure in the regions of interest to reveal their structural characteristics and weak areas. The pedicles are anchored to the posterior side of the vertebral body. Each pedicle forms one of the lateral sides of the vertebral arch. It consists of four parts, the right and left pedicles and the right and left laminae. The vertebral arch forms the posterior portion of each vertebra. Intervertebral discs unite the bodies of adjacent vertebrae. Each spinal nerve exits through an intervertebral foramen, located between adjacent vertebrae. ![]() The vertebral foramen provides for passage of the spinal cord. Arising from the vertebral arch are the transverse, spinous, superior articular, and inferior articular processes. The arch is formed by the paired pedicles and paired laminae. A typical vertebra consists of a body and a vertebral arch.
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