Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis
ABSTRACT Objective The clivus is trapezoidal in shape with uneven bone structure, the optimal number and position of screws for clival fixation are not clear. Therefore, this study aims to explore the optimization clival screw fixation method for occipitocervical instability using finite element ana...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-02-01
|
| Series: | Orthopaedic Surgery |
| Subjects: | |
| Online Access: | https://doi.org/10.1111/os.14314 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832557698472738816 |
|---|---|
| author | Weipeng Lin Jianying Zheng Meichao Zhang Panjie Xu Hang Xiao Wei Ji |
| author_facet | Weipeng Lin Jianying Zheng Meichao Zhang Panjie Xu Hang Xiao Wei Ji |
| author_sort | Weipeng Lin |
| collection | DOAJ |
| description | ABSTRACT Objective The clivus is trapezoidal in shape with uneven bone structure, the optimal number and position of screws for clival fixation are not clear. Therefore, this study aims to explore the optimization clival screw fixation method for occipitocervical instability using finite element analysis. Methods Seven finite element models were developed to evaluate biomechanical properties of clival screw fixation for treating occipitocervical stability, including (i) one clival screw fixation A1 and A2 models; (ii) two clival screws fixation B1 and B2 models; (iii) three clival screws fixation C1 and C2 models; (iv) four clival screws fixation D1 model. Loads of 1.5 Nm were applied to the model fRoM different directions to induce flexion, extension, lateral bending, and axial rotation movements. Results The regular triangle C1 type three clival screws fixation exhibited great stability, with RoM of 4.20° in flexion, 5.80° in extension, 0.85° in lateral bending, and 1.60° in axial rotation. The peak stress on the internal fixation devices were relatively low, with maximum screw stress of 194 MPa in flexion, 276 MPa in extension, 180 MPa in lateral bending, and 213 MPa in axial rotation; the maximum plate stress were 126, 554, 426, and 378 MPa, respectively. The areas with higher stress were mainly concentrated at the robust neck section of the plate. Conclusion The triangular configuration of three clival screws fixation represented the optimized anterior occipitocervical fixation method through the clivus, offering superior biomechanical stability, lower stress on the devices and dispersed stress distribution in the occipitocervical region. |
| format | Article |
| id | doaj-art-4eb3c50557044f3e8b27cb1a59b0c2e7 |
| institution | Kabale University |
| issn | 1757-7853 1757-7861 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Orthopaedic Surgery |
| spelling | doaj-art-4eb3c50557044f3e8b27cb1a59b0c2e72025-02-03T03:10:59ZengWileyOrthopaedic Surgery1757-78531757-78612025-02-0117258359210.1111/os.14314Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element AnalysisWeipeng Lin0Jianying Zheng1Meichao Zhang2Panjie Xu3Hang Xiao4Wei Ji5Department of Orthopaedics Yunfu People's Hospital Yunfu ChinaDivision of Spinal Surgery, Department of Orthopaedics, Nanfang Hospital Southern Medical University Guangzhou ChinaDepartment of Anatomy Southern Medical University Guangzhou ChinaDivision of Spinal Surgery, Department of Orthopaedics, Nanfang Hospital Southern Medical University Guangzhou ChinaDivision of Spinal Surgery, Department of Orthopaedics, Nanfang Hospital Southern Medical University Guangzhou ChinaDepartment of Orthopaedics Yunfu People's Hospital Yunfu ChinaABSTRACT Objective The clivus is trapezoidal in shape with uneven bone structure, the optimal number and position of screws for clival fixation are not clear. Therefore, this study aims to explore the optimization clival screw fixation method for occipitocervical instability using finite element analysis. Methods Seven finite element models were developed to evaluate biomechanical properties of clival screw fixation for treating occipitocervical stability, including (i) one clival screw fixation A1 and A2 models; (ii) two clival screws fixation B1 and B2 models; (iii) three clival screws fixation C1 and C2 models; (iv) four clival screws fixation D1 model. Loads of 1.5 Nm were applied to the model fRoM different directions to induce flexion, extension, lateral bending, and axial rotation movements. Results The regular triangle C1 type three clival screws fixation exhibited great stability, with RoM of 4.20° in flexion, 5.80° in extension, 0.85° in lateral bending, and 1.60° in axial rotation. The peak stress on the internal fixation devices were relatively low, with maximum screw stress of 194 MPa in flexion, 276 MPa in extension, 180 MPa in lateral bending, and 213 MPa in axial rotation; the maximum plate stress were 126, 554, 426, and 378 MPa, respectively. The areas with higher stress were mainly concentrated at the robust neck section of the plate. Conclusion The triangular configuration of three clival screws fixation represented the optimized anterior occipitocervical fixation method through the clivus, offering superior biomechanical stability, lower stress on the devices and dispersed stress distribution in the occipitocervical region.https://doi.org/10.1111/os.14314anterior internal fixationbiomechanicsfinite element analysisoccipitocervical fusionupper cervical spine |
| spellingShingle | Weipeng Lin Jianying Zheng Meichao Zhang Panjie Xu Hang Xiao Wei Ji Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis Orthopaedic Surgery anterior internal fixation biomechanics finite element analysis occipitocervical fusion upper cervical spine |
| title | Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis |
| title_full | Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis |
| title_fullStr | Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis |
| title_full_unstemmed | Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis |
| title_short | Biomechanical Evaluation of Clival Screw Fixation for Occipitocervical Instablity: A Finite Element Analysis |
| title_sort | biomechanical evaluation of clival screw fixation for occipitocervical instablity a finite element analysis |
| topic | anterior internal fixation biomechanics finite element analysis occipitocervical fusion upper cervical spine |
| url | https://doi.org/10.1111/os.14314 |
| work_keys_str_mv | AT weipenglin biomechanicalevaluationofclivalscrewfixationforoccipitocervicalinstablityafiniteelementanalysis AT jianyingzheng biomechanicalevaluationofclivalscrewfixationforoccipitocervicalinstablityafiniteelementanalysis AT meichaozhang biomechanicalevaluationofclivalscrewfixationforoccipitocervicalinstablityafiniteelementanalysis AT panjiexu biomechanicalevaluationofclivalscrewfixationforoccipitocervicalinstablityafiniteelementanalysis AT hangxiao biomechanicalevaluationofclivalscrewfixationforoccipitocervicalinstablityafiniteelementanalysis AT weiji biomechanicalevaluationofclivalscrewfixationforoccipitocervicalinstablityafiniteelementanalysis |