VLE 1 Extra-Oral exam

Question 1

What should you consider before you start the clinical examination. Eg. age etc?

Answer 1

• age of pt
• what the pt is complaining of, may be the parents
• what the pt expectations are
• does the pt know what to expect
• will the pt wear braces or removable appliances

Question 2

What should you check for in medical history before the clinical examination?

Answer 2

• diabetes
• epilepsy
• allergy to nickel and latex
• medications like ciclosporin and phenytoin that can cause gingival hyperplasia

Question 3

What is the problem with taking steroids and orthodontics?

Answer 3

Steroids make you more prone to candida infections with removable appliances

Question 4

What to check for in dental history?

Answer 4

• regular/irregular attendee
• any previous experience of dentistry
• any previous orthodontic treatment
• any history of dental trauma

Question 5

What to ask for in social history?

Answer 5

• diet
• attitude
• ability to attend appointments
• school

Question 6

What does the extra-oral assessment involve?

Answer 6

Analysis of the skeletal components and the soft tissues

Question 7

What is extra-oral examination split into?

Answer 7

Skeletal and TMJ

Question 8

What is skeletal examination split into?

Answer 8

• Anterio-posterior (AP)
• Vertical proportions
• Transverse

Question 9

What is Anterio-posterior split into?

Answer 9

• Class 1
• Class 2
• Class 3

Question 10

What is vertical proportions split into?

Answer 10

• Frankfurt mandibular plane angle
• Lower anterior facial height

Question 11

What is transverse split into?

Answer 11

• Symmetrical
• Asymmetrical

Question 12

What is TMJ split into?

Answer 12

• pain
• clicks
• locking
• deviation of mandible on opening/closing

Question 13

What is a class 1 relationship?

Answer 13

• the ideal AP relationship
• mandible is 2-3mm posterior to the maxilla
• face appears well balanced

Question 14

Where are the fingers in class 1 relationship?

Answer 14

Fingers are roughly parallel to the floor

Question 15

What is the definition of a class 2 relationship?

Answer 15

In relation to the maxilla, the mandible appears more posterior (retruded) than in a class 1 case

Question 16

What is the reason for a class 2 case?

Answer 16

• the maxilla being too far forwards
• the mandible being too far back (retrognathic)

Question 17

Where can you drop a line to in a class 2 face?

Answer 17

Can drop a line from the deepest concavity of the nasal bridge to the deepest concavity of the mandible. The chin point is behind the line which means it is class 2.

Question 18

Where are the fingers in a class 2 relationship?

Answer 18

The hand drops down compared to a class 1

Question 19

What is the definition of a class 3 relationship?

Answer 19

In class 3 the mandible is further anterior than the maxilla.

Question 20

What may be the reasons for a class 3?

Answer 20

• mandible being too large (prognathic)
• the maxilla being set too far back (retrognathic)
• the maxilla being too small (hypoplastic)
• or a combination of all