Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion
Study DesignA retrospective computed tomography (CT)-based morphometric study of 82 occipital condyles in the Indian population, focusing on critical morphometric dimensions with relation to placing condylar screws.PurposeThis study focused on determining the feasibility of placing occipital condyla...
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| Format: | Article |
| Language: | English |
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Korean Spine Society
2017-12-01
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| Series: | Asian Spine Journal |
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| Online Access: | http://www.asianspinejournal.org/upload/pdf/asj-11-847.pdf |
| _version_ | 1818845173038186496 |
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| author | Abhishek Srivastava Geetanjali Nanda Rajat Mahajan Ankur Nanda Nirajana Mishra Srinivasa Karmaran Sahil Batra Harvinder Singh Chhabra |
| author_facet | Abhishek Srivastava Geetanjali Nanda Rajat Mahajan Ankur Nanda Nirajana Mishra Srinivasa Karmaran Sahil Batra Harvinder Singh Chhabra |
| author_sort | Abhishek Srivastava |
| collection | DOAJ |
| description | Study DesignA retrospective computed tomography (CT)-based morphometric study of 82 occipital condyles in the Indian population, focusing on critical morphometric dimensions with relation to placing condylar screws.PurposeThis study focused on determining the feasibility of placing occipital condylar screws in an Indian population using CT anatomical morphometric data.Overview of LiteratureThe occipital condylar screw is a novel technique being explored as one of the options in occipitocervical stabilization. Sex and ethnic variations in anatomical structures may restrict the feasibility of this technique in some populations. To the best of our knowledge, there are no CT-based data on an Indian population that assess the feasibility of occipital condylar screws.MethodsWe measured the dimensions of 82 occipital condyles in 41 adults on coronal, sagittal, and axial reconstructed CT images. The differences were noted between the right and left sides and also between males and females. Statistical analysis was performed using the t-test, with a p-value of <0.05 considered significant.ResultsMean sagittal length and height were 17.2±1.7 mm and 9.1±1.5 mm, respectively. Mean condylar angle/screw angle was 38.0°±5.5° from midline, with mean condylar length and width of 19.6±2.6 mm and 9.5±1.0 mm, respectively. Average coronal height on the anterior and posterior hypoglossal canal was 10.8±1.4 mm and 9.0±1.4 mm, respectively. The values in females were significantly lower than those in males, except for screw angle and condylar width. Based on Lin et al.'s proposed criteria, eight of 82 condyles were not suitable for condylar screws.ConclusionsPreliminary CT morphometry data of the occipital condyle shows that condylar screws are anatomically feasible in a large portion of the Indian population. However, because a small number of population may not be suitable for this technique, meticulous study of preoperative anatomy using detailed CT data is advised. |
| first_indexed | 2024-12-19T05:25:27Z |
| format | Article |
| id | doaj.art-5e82be06ea9446e99051dbae25771d49 |
| institution | Directory Open Access Journal |
| issn | 1976-1902 1976-7846 |
| language | English |
| last_indexed | 2024-12-19T05:25:27Z |
| publishDate | 2017-12-01 |
| publisher | Korean Spine Society |
| record_format | Article |
| series | Asian Spine Journal |
| spelling | doaj.art-5e82be06ea9446e99051dbae25771d492022-12-21T20:34:23ZengKorean Spine SocietyAsian Spine Journal1976-19021976-78462017-12-0111684785310.4184/asj.2017.11.6.847298Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical FusionAbhishek Srivastava0Geetanjali Nanda1Rajat Mahajan2Ankur Nanda3Nirajana Mishra4Srinivasa Karmaran5Sahil Batra6Harvinder Singh Chhabra7Department of Spine Services, Primus Hospital, Chanakyapuri, New Delhi, India.Department of Radiodiagnosis, Mahajan Imaging Center, New Delhi, India.Department of Spine Services, Indian Spinal Injuries Center, Vasant Kunj, New Delhi, India.Department of Spine Services, Indian Spinal Injuries Center, Vasant Kunj, New Delhi, India.Economist and Data Analyst, New Delhi, India.Department of Orthopedics, Tejaswani Hospital, Mangalore, India.Department of Spine Services, Caremax Superspeciality Hospital, Jalandhar, India.Department of Spine Services, Indian Spinal Injuries Center, Vasant Kunj, New Delhi, India.Study DesignA retrospective computed tomography (CT)-based morphometric study of 82 occipital condyles in the Indian population, focusing on critical morphometric dimensions with relation to placing condylar screws.PurposeThis study focused on determining the feasibility of placing occipital condylar screws in an Indian population using CT anatomical morphometric data.Overview of LiteratureThe occipital condylar screw is a novel technique being explored as one of the options in occipitocervical stabilization. Sex and ethnic variations in anatomical structures may restrict the feasibility of this technique in some populations. To the best of our knowledge, there are no CT-based data on an Indian population that assess the feasibility of occipital condylar screws.MethodsWe measured the dimensions of 82 occipital condyles in 41 adults on coronal, sagittal, and axial reconstructed CT images. The differences were noted between the right and left sides and also between males and females. Statistical analysis was performed using the t-test, with a p-value of <0.05 considered significant.ResultsMean sagittal length and height were 17.2±1.7 mm and 9.1±1.5 mm, respectively. Mean condylar angle/screw angle was 38.0°±5.5° from midline, with mean condylar length and width of 19.6±2.6 mm and 9.5±1.0 mm, respectively. Average coronal height on the anterior and posterior hypoglossal canal was 10.8±1.4 mm and 9.0±1.4 mm, respectively. The values in females were significantly lower than those in males, except for screw angle and condylar width. Based on Lin et al.'s proposed criteria, eight of 82 condyles were not suitable for condylar screws.ConclusionsPreliminary CT morphometry data of the occipital condyle shows that condylar screws are anatomically feasible in a large portion of the Indian population. However, because a small number of population may not be suitable for this technique, meticulous study of preoperative anatomy using detailed CT data is advised.http://www.asianspinejournal.org/upload/pdf/asj-11-847.pdfOccipital condyleOccipitocervical junctionCraniocervical junctionOccipitocervical fusionCraniocervical fusionOccipital condyle screws |
| spellingShingle | Abhishek Srivastava Geetanjali Nanda Rajat Mahajan Ankur Nanda Nirajana Mishra Srinivasa Karmaran Sahil Batra Harvinder Singh Chhabra Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion Asian Spine Journal Occipital condyle Occipitocervical junction Craniocervical junction Occipitocervical fusion Craniocervical fusion Occipital condyle screws |
| title | Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion |
| title_full | Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion |
| title_fullStr | Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion |
| title_full_unstemmed | Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion |
| title_short | Computed Tomography-Based Occipital Condyle Morphometry in an Indian Population to Assess the Feasibility of Condylar Screws for Occipitocervical Fusion |
| title_sort | computed tomography based occipital condyle morphometry in an indian population to assess the feasibility of condylar screws for occipitocervical fusion |
| topic | Occipital condyle Occipitocervical junction Craniocervical junction Occipitocervical fusion Craniocervical fusion Occipital condyle screws |
| url | http://www.asianspinejournal.org/upload/pdf/asj-11-847.pdf |
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