evaluation criteria for mandible and TMJ

Question 1

AP/PA projection for mandible evaluation criteria

Answer 1

• entire mandible demonstrated
• no rotation or tilt

Question 2

35 degree axial townes evaluation criteria for mandible

Answer 2

• mandibular rami (condyles to gonions) are shown
• no rotation or tilt

Question 3

axiolateral oblique for mandible evaluation criteria

Answer 3

• anatomy of the side closest to IR is visualized; ramus, condylar process, coronoid process, body and mentum
• no superimposition of the side farthest from IR
• no superimposition of C spine
• anatomy of interest demonstrated in profile

Question 4

axiolateral TMJ (Schuller method) evaluation criteria

Answer 4

Closed mouth

• posterior teeth must be in contact. in normal patient the condyle will be visualized in the temporomandibular fossa

open mouth

• mouth should be open as wide as possible, but without the mandible jutting forward. in normal patient the condyle will be visualized anterior and inferior to the temporomandibular fossa

Question 5

Panorex evaluation criteria for TMJs

Answer 5

• must include both condyles and mentus
• should appear with slight “smile”
• too “smiley” means the neck is too flexed
• too “frowny” means the neck is too extended