What is C1 C2 instability?

Atlantoaxial instability (AAI) is characterized by excessive movement at the junction between the atlas (C1) and axis (C2) as a result of either a bony or ligamentous abnormality. Neurologic symptoms can occur when the spinal cord or adjacent nerve roots are involved.

How do you fix C1 instability?

Surgery is often aimed at fixing the instability by fusing vertebral segments together. Surgery is often aimed at fixing the instability by fusing vertebral segments together. In the case of C1-C2 instability, these two vertebrae are fused posteriorly to limit their amount of movement.

What is normal Atlantodental interval?

The atlantodental interval (ADI) is a measurement used to evaluate the atlanto-axial relationship. This distance, described by Hinck et al,6 is conventionally held to be normal when it is less than 3 mm in men and 2.5 mm in women.

How do you fix neck instability?

Most commonly, cervical instability is treated using one or more of the following techniques:

1. Injections.
2. Physical therapy.
3. Joint stabilization.
4. Manipulation.
5. Fusion surgery.
6. Medications.

Can you fix cervical instability?

A 2020 study says: “Spinal chiropractic manipulative therapy can be used to correct cervical instability,” joint disorders, dislocations of cervical vertebrae, and much more. Spinal manipulation is a safe and effective therapy when performed by a highly qualified chiropractor, even in special needs patients.

What is a normal ADI?

The ADI is measured from the inferior border of the anterior tubercle of the C1 arch to the Odontoid process (Dens) of C2. The normal width is 1–5 mm for children & 1–3 mm (maximum) in adults. This space may increase in old age as a response to degeneration of the atlantodental joint complex.

What is the Atlantodental joint?

Introduction. The atlantoaxial joint is a type of synovial joint that is classified as a biaxial, pivot joint. This joint resides in the upper part of the neck between the first and second cervical vertebrae, also known as the atlas and axis, respectively.

Can a C1 fracture cause paralysis?

Symptoms following an injury to the cervical vertebrae C1 and C2 may include: Complete paralysis of arms and legs.