Morphometric Study of Axis Vertebra in Subjects of Indian Origin

Kaur, Jasbir; Kaur, Kamaljeet; Singh, Poonam; Kumar, Ajay

doi:10.18311/ijmds/2018/18911

Cited by 2 publications

(3 citation statements)

References 27 publications

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“…In contrast, the results of Maqbool et al,(2016) in a study done on a Pakistani population, revealed the height of the odontoid process was 19.2 mm in females with a range of (14.1 _ 22.9mm) and 20.7 mm in males with a range of (16.0 _ 24.10 mm) (20) . Present results disagree with those of Kandziora et al,(2001) who reported it to be 20.3 ± 1.90 mm (24) . Regarding the anteroposterior diameter of the odontoid process:…”

Section: Discussioncontrasting

confidence: 99%

“…It was detected in 24 male (24/39) and 15 female (15/39) patients and Type II was recorded in 73 cases (65.2%). It was depicted in 44 male (44/73) and 29 female (29/73) patients and a higher prevalence in the ≤30y age group were pyramidal while the oval type showed a higher prevalence in the >30 age group (statistically significant differences) (23)(24)(25)(26)(27) . Regarding the morphological variants of the dens: In the present study we found one variant (persistent ossiculumterminale) among the sample in contrast to Perdikakis et al (2012) in their study on a Greek population retrospectively reviewing 112 patients who found an osterminale could be identifiable (with different degrees of ossification and fusion) in 22 cases (22-26-27) .…”

Section: Sharma Et Al(2008)mentioning

confidence: 99%

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A Radiological Study of the Morphological Variations in the Odontoid Process of the Axis Vertebra, Benghazi

Makhlouf,

Alzentani,

Mohammed

2023

sjuob

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Background: The axis vertebra (C2) is atypical in its shape and morphological characteristics and forms an integral part of the craniovertebral junction. Aims: to measure height, AP and transverse diameters of the odontoid process of Libyan subjects using CT scans and to compare the results of the present study with the results of other studies conducted by different authors in different populations. Method: A descriptive, retrospective study was used by reviewing 167 CT scan images that were randomly selected from the CT suit of the Radiology Department at Aljalaa Hospital for Surgery and Accidents in Benghazi from April to July 2019. Patients with gross pathology or degenerative bone disease and those with evidence of an injury to the upper cervical spine were excluded from the study. The measurements of the odontoid process (height, AP and transverse diameters) were assessed. The data was entered and analyzed by using SPSS version 22. Results: The mean and median of the dens height of the odontoid process were nearly equal, with minimal & maximum values of 12.70 &17.60 mm respectively. Regarding the anteroposterior diameter of the process, the mean & median were nearly equal (11.18 & 11.30 mm respectively). The minimum & maximum values were (9.10 & 13.10 mm respectively). The mean ± SD of the transverse diameter was 9.04 ± 0.63 mm. Conclusion: The knowledge of these dimensions can provide useful information for the safe planning of osseous fixation and understanding of the development of the odontoid process, both in normal and in variant forms. Additionally, its phenotypical morphology is a prerequisite for the diagnosis and treatment of patients presenting with disorders affecting the craniocervical spine.

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Section: Discussioncontrasting

confidence: 99%

Section: Sharma Et Al(2008)mentioning

confidence: 99%

A Radiological Study of the Morphological Variations in the Odontoid Process of the Axis Vertebra, Benghazi

Makhlouf,

Alzentani,

Mohammed

2023

sjuob

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“…Singla et al [9] have established that the superior facets are inclined by a mean of 69.3° in the coronal plane and the inferior facets by 42.1° in the sagittal plane. There is scant information on the missing values of the facet orientation along the other Cartesian co-ordinates [10,11]. Moreover, little emphasis if any at all, has been laid on the clinical and mechanical import of this information (more attention has been paid to the feasibility of screw trajectory within the bone) [12-19].…”

Section: Anatomical Featuresmentioning

confidence: 99%

Mechanically Relevant Anatomy of the Axis Vertebra and Its Relation to Hangman’s Fracture: An Illustrated Essay

Menon

2019

Neurospine

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To describe the biomechanically relevant anatomy of the Axis vertebra and the load transfer patterns within the bone, and on that basis, to postulate its mechanism of injury, a literature review was conducted of the anatomy and biomechanics of Axis fractures. Two hypotheses have been presented: the internal gear hypothesis and the leaf spring hypothesis. Both are based on the trabecular anatomy of the vertebra and its load transmission patterns. The relationship of the Axis with Hangman’s injury is also discussed. According to the leaf spring hypothesis, the C2 pedicle corresponds to the shackle in the assembly and constitutes the weak link. The trabecular architecture of the Axis is such that the primary compression of the trabeculae is directed from the superior facet to the C2–3 endplate, with few trabeculae directed to the inferior facet. Along with the trabecular void in this area, this renders the isthmus vulnerable to trauma. The isthmus of the Axis is biomechanically susceptible to injury due to its unique anatomy in relation to the whole cervical spine and the internal load transmission patterns of the bone. The author suggests that in the flexion type of Hangman’s injury, the C1–2 posterior ligaments are disrupted and need to be addressed.

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Morphometric Study of Axis Vertebra in Subjects of Indian Origin

Abstract: ABSTRACT

Cited by 2 publications

References 27 publications

A Radiological Study of the Morphological Variations in the Odontoid Process of the Axis Vertebra, Benghazi

A Radiological Study of the Morphological Variations in the Odontoid Process of the Axis Vertebra, Benghazi

Mechanically Relevant Anatomy of the Axis Vertebra and Its Relation to Hangman’s Fracture: An Illustrated Essay

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