ArticleSurgical and radiologic anatomy : SRA2020
Os odontoideum: diagnosis and role of imaging.
Article in Surgical and radiologic anatomy : SRA, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 15 citations in OpenAlex.
- Innovative One-Hole Split Endoscopy for Posterior Atlantoaxial Lateral Mass Joint Fusion: Technical Details and Preliminary Clinical Application.International journal of spine surgery · 2026Article
- The mutational burden in os odontoideum patients.Orphanet journal of rare diseases · 2026Article
- A novel image-based classification system for atlantoaxial deformity caused by mucopolysaccharidosis type IVA: an efficacy evaluation.Journal of orthopaedic surgery and research · 2025Article
- Dystopic Os Odontoideum With Chronic Posterior Atlantoaxial Subluxation: A Case Report.Cureus · 2024Article
- Mobility Assessment Using Multi-Positional MRI in Children with Cranio-Vertebral Junction Anomalies.Journal of clinical medicine · 2023Article
- Prevalence and radiographic features of atlantoaxial dislocation in adult patients with Kashin-Beck disease.International orthopaedics · 2023Article
- A retrospective study of incidental findings occurring in a consecutive case series of lateral cephalograms of 12- to 20-year-old patients referred for routine orthodontic treatment.Imaging science in dentistry · 2022Article
- Cervical myelopathy involving os odontoideum with retro-odontoid cyst and atlanto-axial instability: A case report.Radiology case reports · 2022Article
- Os odontoideum associated with a retro-odontoid cyst treated with posterior C1-C3 fixation: A case report and literature review.Frontiers in surgery · 2022Article
- Os odontoideum: A comprehensive review.Journal of craniovertebral junction & spineReview
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo elucidate the imaging manifestations of os odontoideum, establish the diagnosis and guide surgical therapy.
methodsClinical and imaging data, including X-ray, CT and MR of 24 patients with os odontoideum, were retrieved and reviewed retrospectively.
resultsOs odontoideum with intact cortex was divided into round, conical and blunt tooth types. Four cases of orthotopic and 20 cases of dystopic os odontoideum were included. There was anterior displacement of the base of the dens in six cases, posterior displacement in nine cases and no displacement in nine cases. A widening of anterior atlanto-axial space was shown in 14 patients with varying degrees. Thickening of the soft tissue posterior to the dens was observed in 19 patients, spinal canal stenosis in 21 patients, cervical myelopathy in 10 patients and craniocervical junction malformation in 9 patients. Posterior C1-C2 pedicle screw fixation and fusion was performed in 12 patients and 4 patients underwent posterior occipito-cervical fixation and fusion.
conclusionRadiographically, os odontoideum is defined as an independent ossicle of variable size with smooth circumferential cortical margins separated from the axis. Imaging can be used to assess atlanto-axial instability, associated normal or abnormal anatomical structures and guide surgical therapy.
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