The odontoid process (also dens or odontoid peg) is a protuberance (process or projection) of the Axis (second cervical vertebra). It exhibits a slight constriction or neck, where it joins the main body of the vertebra.
Just so, what is the dens in the cervical spine?
Odontoid process (Dens) This is a rostral, or upwards extension from the body of the Axis (C2, Second cervical vertebral body). It serves as a point of rotation of Atlas (C1, First cervical vertebral body) and the Axis (C2, Second cervical vertebral body).
Furthermore, what is the function of the dens? It is a blunt tooth–like process that projects upward. It is also referred to as the 'dens' (Latin for 'tooth') or odontoid process. The dens provides a type of pivot and collar allowing the head and atlas to rotate around the dens.
Then, is the dens on c1 or c2?
The C1 vertebra, also called atlas, is shaped like a ring. The C2 vertebra has an upward-facing long bony process called the dens. The dens forms a joint with the C1 vertebra and facilitates its turning motions, thereby allowing the head to turn in different directions.
Where is a dens fracture?
A type II odontoid fracture is a break that occurs through a specific part of C2, the second bone in the neck. Bones of the spine are called vertebrae. The bone involved in odontoid fracture is the second vertebra, C2, high up in the neck.
What is a hangman's fracture?
Hangman's fracture is a break in a specific part of one bone in the neck. Bones of the spine are called vertebrae. The bone involved in hangman's fracture is the second vertebra, toward the top of the neck, close to the skull. In a hangman's fracture, the pars of C2 fractures, or breaks, on both sides.What does the Dens articulate with?
One of the most prominent features of the axis bone is a superior, tooth-like projection called the odontoid process (or dens). articulates with the anterior arch of the atlas bone, where they form a pivot joint. rotates side-to-side, the atlas bone rotates around the peg-like odontoid process.Why is c2 called axis?
C2 (cervical vertebra): C2 is the symbol for the second cervical vertebra, which is also called the axis. It is so-named because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of the second cervical vertebra. The Latin word "axis" means axle or pole.What vertebra has the Odontoid process?
Description. The odontoid process (also dens or odontoid peg) is a protuberance (process or projection) of the Axis (second cervical vertebra). It exhibits a slight constriction or neck, where it joins the main body of the vertebra.What is a Type III dens fracture?
A type III odontoid fracture is a fracture through the body of the C2 vertebrae and may involve a variable portion of the C1 and C2 facets. Type III odontoid fractures occur secondary to hyperextension or hyperflexion of the cervical spine in a similar manner to type II odontoid fractures.What is the dens of c2?
The axis is the second cervical vertebra, commonly called C2. It is an atypical cervical vertebra with unique features and important relations that make it easily recognisable. Its most prominent feature is the odontoid process (or dens), which is embryologically the body of the atlas (C1) 1,2.What is spinal immobilization and why is it used?
Spinal Immobilization in Trauma Patients. LBBs are used to help prevent spinal movement and facilitate extrication of patients. Cervical collars (C-Collars) are used to help prevent movement of the cervical spine and often are combined with lateral head blocks and straps.What is the first cervical vertebra called?
Medical Definition of Atlas and axis joint The atlas is the first cervical (neck) vertebra which is just under the head; it is named for Atlas, the Greek god who supported the world on his shoulders. The axis is the second cervical vertebra; it has what is called the odontoid process about which the atlas rotates.What nerves are affected by c1 and c2?
C1, C2, and C3 (the first three cervical nerves) help control the head and neck, including movements forward, backward, and to the sides. The C2 dermatome handles sensation for the upper part of the head, and the C3 dermatome covers the side of the face and back of the head.What nerves are affected by c1?
Cervical spinal nerve 1- Geniohyoid muscle- through Hypoglossal nerve.
- Rectus capitis anterior muscle.
- Longus capitis muscle (partly)
- Rectus capitis lateralis muscle.
- Splenius cervicis muscle (partly)
- Rectus capitis posterior major muscle.
- levator scapulae muscle (partly)
- Thyrohyoid muscle – through hypoglossal nerve.
