Question

What are the landmarks associated with the Atlantodental Interspace?

What does it indicate if the line measures more than 3 mm in an adult or 5 mm in a child?

Answer 1

The Atlantodental Interspace refers to the space between the atlas and the dens in the spine. If this space measures more than 3 mm in adults or 5 mm in children, it may indicate instability in the upper cervical spine.

Step-by-step explanation:

The Atlantodental Interspace refers to the space between the atlas (C1 vertebra) and the dens (odontoid process) of the axis (C2 vertebra) in the spine. This space is measured on lateral X-rays, and is typically less than 3 mm in adults or less than 5 mm in children.

If the Atlantodental Interspace measures more than 3 mm in an adult or more than 5 mm in a child, it may indicate instability in the upper cervical spine. This can be caused by various conditions such as trauma, rheumatoid arthritis, or congenital abnormalities. Further evaluation and medical intervention may be necessary in such cases.