Atlanto-axial Joint

Question 1

What are the classifications of the atlanto-axial joint?

Answer 1

Diarthrosis trochoid, diarthrosis arthrodia, and amphiarthrosis syndesmosis

Question 2

Which atlanto-axial joint is identified as a diarthrosis trochoid joint?

Answer 2

The median atlanto-axial joint

Question 3

What is the function of the transverse atlantal ligament?

Answer 3

it is the primary stabilizer of the atlanto-axial joint restricting the distance of C2 from the anterior arch of C1

Question 4

What movements are facilitated at the median atlanto-axial joint?

Answer 4

flexion-extension, rotation, and telescoping

Question 5

What is the ADI?

Answer 5

Atlanto-Dental Interspace, a radiographic distance between the surfaces of the anterior bursa of the median atlanto-axial joint

Question 6

The ADI is observed between which surfaces?

Answer 6

The fovea dentis of C1 and the facet for fovea dentis of C2

Question 7

What is the ADI of children compared with that of adults?

Answer 7

Children: about 4.5mm
Adults: range of about 2-3 mm

Question 8

What is the function of the anterior atlanto-axial ligament?

Answer 8

It resists extension

Question 9

What is the joint classification of the anterior atlanto-axial ligament?

Answer 9

Amphiarthrosis syndesmosis