Artificial atlantoaxial and subaxial facetal joint - Proposal of models

Goel, Atul

doi:10.4103/jcvjs.jcvjs_74_22

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…Posterior instrumentation relies on good contact to achieve bony fusion [ 12 ]. In addition, due to the irregular shape and inclination of the lateral atlantoaxial mass articular surfaces [ 13 ], the failure of posterior atlantoaxial fusion often occurs when the bone graft material is simply laid between the lateral atlantoaxial mass articular surfaces without stable fixation and compression. Therefore, it is important to accurately measure the data related to the articular surface of the lateral atlantoaxial mass to provide reliable information for the optimization of atlantoaxial fusion devices in the future.…”

Section: Discussionmentioning

confidence: 99%

Study on articular surface morphology of atlantoaxial lateral mass based on differential manifold

Zhang,

Zhao,

Chou

et al. 2023

J Orthop Surg Res

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Objectives To propose a surface reconstruction algorithm based on a differential manifold (a space with local Euclidean space properties), which can be used for processing of clinical images and for modeling of the atlantoaxial joint. To describe the ideal anatomy of the lateral atlantoaxial articular surface by measuring the anatomical data. Methods Computed tomography data of 80 healthy subjects who underwent cervical spine examinations at our institution were collected between October 2019 and June 2022, including 46 males and 34 females, aged 37.8 ± 5.1 years (28–59 years). A differential manifold surface reconstruction algorithm was used to generate the model based on DICOM data derived by Vision PACS system. The lateral mass articular surface was measured and compared in terms of its sagittal diameter, transverse diameter, articular surface area, articular curvature and joint space height. Results There was no statistically significant difference between left and right sides of the measured data in normal adults (P > 0.05). The atlantoaxial articular surface sagittal diameter length was (15.83 ± 1.85) and (16.22 ± 1.57) mm on average, respectively. The transverse diameter length of the articular surface was (16.29 ± 2.16) and (16.49 ± 1.84) mm. The lateral articular surface area was (166.53 ± 7.69) and (174.48 ± 6.73) mm2 and the curvature was (164.03 ± 5.27) and (153.23 ± 9.03)°, respectively. The joint space height was 3.05 ± 0.11mm, respectively. There is an irregular articular space in the lateral mass of atlantoaxial, and both upper and lower surfaces of the articular space are concave. A sagittal plane view shows that the inferior articular surface of the atlas is mainly concave above; however, the superior articular surface of the axis is mainly convex above. In the coronal plane, the inferior articular surface of the atlas is mostly concave above, with most concave vertices located in the medial region, and the superior articular surface of the axis is mainly concave below, with most convex vertices located centrally and laterally. Conclusion A differential manifold algorithm can effectively process atlantoaxial imaging data, fit and control mesh topology, and reconstruct curved surfaces to meet clinical measurement applications with high accuracy and efficiency; the articular surface of the lateral mass of atlantoaxial mass in normal adults has relatively constant sagittal diameter, transverse diameter and area. The distance difference between joint spaces is small, but the shape difference of articular surfaces differs greatly.

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Section: Discussionmentioning

confidence: 99%

Study on articular surface morphology of atlantoaxial lateral mass based on differential manifold

Zhang,

Zhao,

Chou

et al. 2023

J Orthop Surg Res

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show abstract

“…Posterior instrumentation relies on good contact to achieve bony fusion [12]. In addition, due to the irregular shape and inclination of the lateral atlantoaxial mass articular surfaces [13], the failure of posterior atlantoaxial fusion often occurs when the bone graft material is simply laid between the lateral atlantoaxial mass articular surfaces without stable xation and compression. Therefore, it is important to accurately measure the data related to the articular surface of the lateral atlantoaxial mass to provide reliable information for the optimization of atlantoaxial fusion devices in the future.…”

Section: Current Problems With Posterior Atlantoaxial Fusionmentioning

confidence: 99%

Study on Articular Surface Morphology of Atlantoaxial Lateral Mass Based on Differential Manifold

Zhang

Zhao

Chou

et al. 2023

Preprint

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Objectives To propose a surface reconstruction algorithm based on a differential manifold (a space with local Euclidean space properties), which can be used for processing of clinical images and for modeling of the atlantoaxial joint. To describe the ideal anatomy of the lateral atlantoaxial articular surface by measuring the anatomical data. Methods Computed tomography data of 80 healthy subjects who underwent cervical spine examinations at our institution were collected between October 2019 and June 2022, including 46 males and 34 females, aged 37.8 ± 5.1 years (28-59 years). A differential manifold surface reconstruction algorithm was used to generate the model based on DICOM data derived by Vision PACS system. The lateral mass articular surface was measured and compared in terms of its sagittal diameter, transverse diameter, articular surface area, articular curvature and joint space height. Results There was no statistically significant difference between left and right sides of the measured data in normal adults (P > 0.05). The atlantoaxial articular surface sagittal diameter length was（15.83±1.85）and（16.22±1.57）mm on average respectively. The transverse diameter length of the articular surface was (16.29±2.16) and (16.49±1.84) mm. The lateral articular surface area was (166.53±7.69）and (174.48±6.73) mm2 and the curvature was (164.03±5.27) and (153.23±9.03)°respectively. The joint space height was 3.05±0.11mm respectively. There is an irregular articular space in the lateral mass of atlantoaxial, and both upper and lower surfaces of the articular space are concave. A sagittal plane view shows that the inferior articular surface of the atlas is mainly concave above; however the superior articular surface of the axis is mainly convex above. In the coronal plane, the inferior articular surface of the atlas is mostly concave above, with most concave vertices located in the medial region, and the superior articular surface of the axis is mainly concave below, with most convex vertices located centrally and laterally. Conclusion Differential manifold algorithms can effectively process atlantoaxial imaging data, fit and control mesh topology, and reconstruct curved surfaces to meet clinical measurement applications with high accuracy and efficiency; The articular surface of the lateral mass of atlantoaxial mass in normal adults has relatively constant sagittal diameter, transverse diameter and area. The distance difference between joint spaces is small, but the shape difference of articular surfaces differs greatly.

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“…Models of implants suitable for deployment as artificial atlantoaxial and subaxial facetal joints were recently reported. [33][34][35][36] For this reason, surgical treatment is especially indicated in patients who have a higher risk for nonunion, such as degree of comminution in the base of the dens, fracture displacement, fracture alignment and rupture of the transverse ligament. [37][38][39][40][41][42][43]…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The internal trabecular bone structure of the odontoid process of the axis. A retrospective single-center comparative study in patients following cervical trauma.

Montemurro

Cocciaro

Liberti

et al. 2022

J Neurol Surg A Cent Eur Neurosurg

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Background Odontoid C2 fractures account for 9% to 15% of adult cervical spine fractures. The aim of this study is to report the incidence of a previous described Y-shaped trabecular bone structure (TBS) in the odontoid process in a larger sample of patients who performed a CT cervical scan following a cervical trauma to investigate if its absence can increase the risk of the odontoid process fracture of the axis. Methods A retrospective review of 245 patients who performed a CT cervical scan in our University Hospital, as results of cervical spine injury, was performed during a 12-month period between May 2020 and May 2021. Results The presence of a Y-shaped TBS at the odontocentral synchondrosis level was observed in 165 patients that is 67.3% of whole population included in this study. Eighteen patients (7.3%) reported an odontoid type II C2 fracture. Among patients with odontoid type II C2 fracture, the Y-shaped TBS at the odontocentral synchondrosis level was observed in 8 (44.4%) of them. The presence of the Y-shaped TBS at the odontocentral synchondrosis level was statistically more frequently observed in patients without odontoid process fracture (69.2% Vs 30.8%) compared to patients who developed odontoid process fracture (44.4 % Vs 55.6%) after a cervical trauma (p = 0.03). Conclusions This study showed the crucial role of this Y-shaped TBS in biomechanical structural dynamics of the C1-C2 joint and its significant clinical relevance in odontoid fractures of the axis.

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Artificial atlantoaxial and subaxial facetal joint - Proposal of models

Cited by 3 publications

References 24 publications

Study on articular surface morphology of atlantoaxial lateral mass based on differential manifold

Study on articular surface morphology of atlantoaxial lateral mass based on differential manifold

Study on Articular Surface Morphology of Atlantoaxial Lateral Mass Based on Differential Manifold

The internal trabecular bone structure of the odontoid process of the axis. A retrospective single-center comparative study in patients following cervical trauma.

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