Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements
Study Design Observational study of computed tomography (CT) data. Purpose We performed a CT-based radiographic analysis of sub-axial cervical lamina in the Indian population to assess the feasibility of laminar screws. Overview of Literature Morphometric studies have been performed for populations...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Korean Spine Society
2019-02-01
|
| Series: | Asian Spine Journal |
| Subjects: | |
| Online Access: | http://www.asianspinejournal.org/upload/pdf/asj-2018-0110.pdf |
| _version_ | 1818458808979030016 |
|---|---|
| author | Abhishek Srivastava Geetanjali Nanda Rajat Mahajan Ankur Nanda Sahil Batra Nirajana Mishra Naveen Pandita Harvinder Singh Chhabra |
| author_facet | Abhishek Srivastava Geetanjali Nanda Rajat Mahajan Ankur Nanda Sahil Batra Nirajana Mishra Naveen Pandita Harvinder Singh Chhabra |
| author_sort | Abhishek Srivastava |
| collection | DOAJ |
| description | Study Design Observational study of computed tomography (CT) data. Purpose We performed a CT-based radiographic analysis of sub-axial cervical lamina in the Indian population to assess the feasibility of laminar screws. Overview of Literature Morphometric studies have been performed for populations of various ethnic groups, but none exist for Indian populations. Methods Cervical spine CT scans of 50 adults with a minimum slice thickness of <2 mm (0.5–2 mm) were obtained from the database of a single center in northern India. Measurements (e.g., length, thickness, and height) were taken in millimeters along the axial, coronal, and sagittal planes. Three measurements were made to assess laminar anatomy, namely, the translaminar/screw length, laminar thickness, and sagittal laminar height. Results The final sample comprised 500 laminae in 50 patients, resulting in 1,500 measurements. The mean translaminar lengths of the C3, C4, C5, C6, and C7 laminae were 19.48 mm, 19.60 mm, 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- , 19.60 , 19.60 mm, 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- mm, 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- , 19.61 , 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- , 20.49 , 20.49 mm, and 22.85 mm, respectively. The mean thick- mm, and 22.85 mm, respectively. The mean thick- , and 22.85 mm, respectively. The mean thick , and 22.85 mm, respectively. The mean thicknesses of these cervical laminae were 3.12 mm, 2.62 mm, 2.56 mm, 3.47 mm, and 5.20 mm, respectively. The mean sagittal heights of these laminae were 9.38 mm, 9.80 mm, 10.12 mm, 11.31 mm, and 13.84 mm, respectively. Except for the C7 vertebrae, all other levels had a success rate of <10% in the Indian population using the criteria of a laminar height of at least 9 mm and thickness of 4.5 mm. Limited success was achieved at the C5, C6, and C3 levels. Conclusions To the best of our knowledge, the present study is the only series on the feasibility of laminar screws in the sub-axial cervical spine in the Indian population. We found that Indian patients have smaller anatomical dimensions and thus, are not suitable for laminar screws in the sub-axial cervical spine, barring C7, which is contrary to findings for populations in western and south Asian countries. |
| first_indexed | 2024-12-14T23:04:21Z |
| format | Article |
| id | doaj.art-6916932d9d5d4e2fbfbc70583bd6c586 |
| institution | Directory Open Access Journal |
| issn | 1976-1902 1976-7846 |
| language | English |
| last_indexed | 2024-12-14T23:04:21Z |
| publishDate | 2019-02-01 |
| publisher | Korean Spine Society |
| record_format | Article |
| series | Asian Spine Journal |
| spelling | doaj.art-6916932d9d5d4e2fbfbc70583bd6c5862022-12-21T22:44:23ZengKorean Spine SocietyAsian Spine Journal1976-19021976-78462019-02-0113171210.31616/asj.2018.0110983Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry MeasurementsAbhishek Srivastava0Geetanjali Nanda1Rajat Mahajan2Ankur Nanda3Sahil Batra4Nirajana Mishra5Naveen Pandita6Harvinder Singh Chhabra7 Department of Spine Services, Primus Hospital, New Delhi, India Department of Radiodiagnosis, Mahajan Imaging Centre, New Delhi, India Department of Spine Services, Indian Spinal Injuries Centre, New Delhi, India Department of Spine Services, Indian Spinal Injuries Centre, New Delhi, India Department of Spine Services, Caremax Superspeciality Hospital, Jalandhar, India Economist and Data Analyst, New Delhi, India Department of Spine Services, Primus Hospital, New Delhi, India Department of Spine Services, Indian Spinal Injuries Centre, New Delhi, IndiaStudy Design Observational study of computed tomography (CT) data. Purpose We performed a CT-based radiographic analysis of sub-axial cervical lamina in the Indian population to assess the feasibility of laminar screws. Overview of Literature Morphometric studies have been performed for populations of various ethnic groups, but none exist for Indian populations. Methods Cervical spine CT scans of 50 adults with a minimum slice thickness of <2 mm (0.5–2 mm) were obtained from the database of a single center in northern India. Measurements (e.g., length, thickness, and height) were taken in millimeters along the axial, coronal, and sagittal planes. Three measurements were made to assess laminar anatomy, namely, the translaminar/screw length, laminar thickness, and sagittal laminar height. Results The final sample comprised 500 laminae in 50 patients, resulting in 1,500 measurements. The mean translaminar lengths of the C3, C4, C5, C6, and C7 laminae were 19.48 mm, 19.60 mm, 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- , 19.60 , 19.60 mm, 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- mm, 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- , 19.61 , 19.61 mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- mm, 20.49 mm, and 22.85 mm, respectively. The mean thick- , 20.49 , 20.49 mm, and 22.85 mm, respectively. The mean thick- mm, and 22.85 mm, respectively. The mean thick- , and 22.85 mm, respectively. The mean thick , and 22.85 mm, respectively. The mean thicknesses of these cervical laminae were 3.12 mm, 2.62 mm, 2.56 mm, 3.47 mm, and 5.20 mm, respectively. The mean sagittal heights of these laminae were 9.38 mm, 9.80 mm, 10.12 mm, 11.31 mm, and 13.84 mm, respectively. Except for the C7 vertebrae, all other levels had a success rate of <10% in the Indian population using the criteria of a laminar height of at least 9 mm and thickness of 4.5 mm. Limited success was achieved at the C5, C6, and C3 levels. Conclusions To the best of our knowledge, the present study is the only series on the feasibility of laminar screws in the sub-axial cervical spine in the Indian population. We found that Indian patients have smaller anatomical dimensions and thus, are not suitable for laminar screws in the sub-axial cervical spine, barring C7, which is contrary to findings for populations in western and south Asian countries.http://www.asianspinejournal.org/upload/pdf/asj-2018-0110.pdfIndianCervicalMorphometryTranslaminarScrews |
| spellingShingle | Abhishek Srivastava Geetanjali Nanda Rajat Mahajan Ankur Nanda Sahil Batra Nirajana Mishra Naveen Pandita Harvinder Singh Chhabra Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements Asian Spine Journal Indian Cervical Morphometry Translaminar Screws |
| title | Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements |
| title_full | Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements |
| title_fullStr | Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements |
| title_full_unstemmed | Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements |
| title_short | Feasibility of Sub-Axial Cervical Laminar Screws, Including C7, in the Indian Population: A Study on 50 Patients Using Computed Tomography-Based Morphometry Measurements |
| title_sort | feasibility of sub axial cervical laminar screws including c7 in the indian population a study on 50 patients using computed tomography based morphometry measurements |
| topic | Indian Cervical Morphometry Translaminar Screws |
| url | http://www.asianspinejournal.org/upload/pdf/asj-2018-0110.pdf |
| work_keys_str_mv | AT abhisheksrivastava feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT geetanjalinanda feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT rajatmahajan feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT ankurnanda feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT sahilbatra feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT nirajanamishra feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT naveenpandita feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements AT harvindersinghchhabra feasibilityofsubaxialcervicallaminarscrewsincludingc7intheindianpopulationastudyon50patientsusingcomputedtomographybasedmorphometrymeasurements |