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Tytuł:
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Feasibility of Double Anterior Odontoid Screw: A CT-Based Morphometric Analysis of the Axis in Adult Indian Population.
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Autorzy:
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Choudhary KS; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Doddamani RS; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Devarajan LJ; Department of Neuroradiology, All India Institute of Medical Sciences, New Delhi, India.
Agrawal M; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Sawarkar D; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Meena RK; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Varma S; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Kumar A; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Singh P; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Chandra PS; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
Kale SS; Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
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Źródło:
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Neurology India [Neurol India] 2020 Nov-Dec; Vol. 68 (6), pp. 1361-1366.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Mumbai : Medknow Publications
Original Publication: Bombay : Neurological Society of India
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MeSH Terms:
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Odontoid Process*/diagnostic imaging
Odontoid Process*/surgery
Spinal Fractures*
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bone Screws ; Child ; Child, Preschool ; Feasibility Studies ; Female ; Humans ; Infant ; Male ; Middle Aged ; Prospective Studies ; Retrospective Studies ; Tomography, X-Ray Computed ; Young Adult
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Contributed Indexing:
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Keywords: CT morphometry; Coronal plane; Herbert screw; double odontoid screws; odontoid fracture; sagittal plane
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Entry Date(s):
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Date Created: 20201221 Date Completed: 20210621 Latest Revision: 20220419
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Update Code:
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20240105
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DOI:
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10.4103/0028-3886.304125
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PMID:
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33342869
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Background: The fractures of the odontoid process constitute 10% of all cervical spine injuries. Odontoid screw placement, although technically challenging, in indicated cases is the ideal treatment. Hence, a thorough knowledge of the odontoid dimensions is necessary prior to the surgical endeavor, more so for planning double odontoid screws.
Materials and Methods: A prospective morphometric analysis of retrospective data of 250 patients was acquired at our institute using Somatom Definition edge 128 slice 64-row detector Siemens CT scanner. The dimensions of the odontoid process were measured at the waist (narrowest portion), widest diameter both in anteroposterior and transverse diameters. The dimensions of the C2 vertebra were measured at the level of the superior and inferior endplate in both the planes.
Results: A total of 250 patients were evaluated with age ranging from 1 to 80 years. Males constituted 174 (69.6%) and 76 (30.4%) were females. The mean transverse diameter (TD) at the odontoid waist (narrowest diameter) was 8.66 mm. The mean TD at the widest point of odontoid was 9.68 mm. Mean anteroposterior (AP) diameter 2.5 mm away from the midline on the left side at the level of the waist was 9.51 mm and 2.5 mm on the right of midline was 9.01 mm. The mean AP diameter at the C2 base was 15.824 mm in males and 14.833 mm in females (P < 0.001).
Conclusion: Double odontoid screw insertion is feasible in only 36% of Indians in the transverse plane, whereas 98.4% of the odontoids can accommodate double screws in the sagittal plane.
Competing Interests: None
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