X Ray Odantoid Process

The odontoid process (dens) is a tooth‑shaped bony projection from the axis (C2) seen on cervical spine X‑rays, especially lateral and open‑mouth odontoid views. It should align centrally with the anterior arch of C1. Radiographs assess its integrity for fractures, displacement, congenital anomalies, degenerative changes, and atlanto‑axial instability, often prompting CT or MRI if abnormal.

The odontoid process, or dens, is a tooth‑like bony projection rising from the second cervical vertebra (axis). It fits into the anterior arch of the atlas (C1), forming a pivot joint that allows head rotation. Its integrity is vital for neck stability; fractures or congenital defects can cause pain, spinal instability, and potential spinal cord injury requiring prompt medical assessment.

The odontoid process (dens) is a bony projection on the second cervical vertebra (axis, C2). It rises upward from the axis into the anterior arch of the first cervical vertebra (atlas, C1), forming the atlanto‑axial pivot joint that allows head rotation. It’s located in the upper cervical spine, just posterior to the nasopharynx and anterior to the spinal cord.

The odontoid process (dens) is a bony projection of the second cervical vertebra, the axis (C2). It projects upward from the body of C2 and fits into the anterior arch of the atlas (C1), forming the atlantoaxial joint. This articulation permits pivoting rotation of the head and neck and is crucial for cervical stability; odontoid fractures are clinically significant.

Yes. The odontoid process (dens) is a peg-like projection unique to the second cervical vertebra (axis, C2). It projects upward to articulate with the anterior arch of the atlas (C1), forming the atlanto‑axial joint that permits head rotation. Fractures or congenital anomalies of the dens can destabilize the craniovertebral junction and need careful assessment and management.

Yes. Inflammatory and degenerative arthritis—especially rheumatoid arthritis—can involve the odontoid (dens) and atlantoaxial joint, causing erosion, pannus formation, and atlantoaxial instability or subluxation. This may produce neck pain, restricted motion, or spinal cord compression with neurological signs. Diagnosis uses clinical assessment and imaging (X‑ray, CT, MRI). Treatment ranges from medical therapy to surgical stabilization for instability or myelopathy.