DMF- Ortho Part 4 (Remember and Cephalometric Angles)

Board Question: what is the most stable landmark in cephalometric radiograph

Sella

Board Question: what is the point between pogonion and menton?

Gnathion

Board Question: Porion to orbitale forms what plane?

Po-Orbitale: Frankfurt horizontal plane

Board Question: Nasion to sella forms what plane?

Na-Sella: Sella-Nasion plane

Board Question: Nasion to pogonion forms what plane?

Facial plane

Board Question: Menton to gonion forms what plane?

Mandibular plane

Plane + Plane = __

Angle

An angle is formed by

Joining two planes

2 important Cephalometric angles mentioned

Frankfurt mandibular plane angle

ANB

2 planes that make up the Frankfurt Mandibular Plane Angle

Mandibular plane

Frankfurt horizontal plane

Board Question: Normal range for ANB

2.5 +/- 2.5

(0-5°)

Board Question: In ANB- Higher than normal range will result to __

Skeletal Class II

Board Question: In ANB- Lower than normal range will result to __

Skeletal Class III

__°= Skeletal Class III

<0°

Skeletal class II= __ profile

Convex

Skeletal class III= __ profile

Concave

Board Question: In frankfurt mandibular plane angle, a Steep mandibular plane angle will result to (3)

LAC

- Long vertical dimension

- Anterior Open Bite

- Class II Molar Rel.

Board Question: In frankfurt mandibular plane angle, a Flat mandibular plane angle will result to (3)

SDC

- Shorter anterior facial vertical dimension

- Deep Bite

- Class III molar rel

Board Question: Common habbit of patients with steep mandibular plane angle

Tongue thrusting habit (due to ant. open bite)

Board Question: Patients with __ mandibular plane angle are also mouth breathers

Steep

Board Question Example: ANB of 8° has what malocclusion?

Skeletal Class II