AP axial TMJ

Question 1

What is the method name for the AP Axial projection of the TMJs?

Answer 1

Modified townes

Question 2

What line should be placed perpendicular for the AP Axial projection of the TMJs?

Answer 2

OML

Question 3

What is the central ray angle for the AP Axial projection of the TMJs? Why is this angle being used?

Answer 3

35 degrees caudad, demonstrate mandibular condyle with superimposition of mastoid process

Question 4

If the patient is unable to flex their neck to place the traditional AP Axial projection of the TMJs, what line can be used instead? How will the central ray angle change?

Answer 4

IOML, 42 degrees caudad

Question 5

What is the central ray location for the AP axial projection of the TMJs?

Answer 5

3” above nasion

Question 6

How many AP Axial projections are to be performed and what is the difference?

Answer 6

1 open mouth
1 closed mouth

Question 7

When the mouth is closed, where should the mandibular condyles be seen?

Answer 7

Centered with mandibular fossa

Question 8

What would the contraindication for the open mouth view of the TMJ?

Answer 8

Fracture