1. Clinical Exam

Question 1

Goal of preventative ortho is

Answer 1

preserve the integrity of developing occlusion (i.e space maintainer and habit breaker)

Question 2

Goal of interceptive ortho

Answer 2

Abnormal situation already exists (i.e extractions, headgear for Class II malocclusion, and eliminating habits)

Question 3

Goal of corrective ortho

Answer 3

Existence of malocclusion is recognized (special training usually required for these cases)

Question 4

What are the three facial types and define them

Answer 4

• Leptoprosopia= long face
• Mesopropsopia= oval face
• Eurvprosopia= short broad face

Question 5

What are the three major anatomic landmarks that divide the head into third vertical thirds

Answer 5

Hairline

Glabella- most prominent point on the forehead in the mid-sagittal plane

Subnasale- junction of the columella with the upper cutaneous lip in the midsagittal plane

Menton= Most inferior contour of the soft tissue chin in the midsagittal plane.

Question 6

In skeletal open bite cases the lower third dimensions of the face will be (increased/decreased) while skeletal deep bite cases will be….

Answer 6

increased…. decreased .

Question 7

Width of the face is divided into how many sections and what are the boundaries

Answer 7

5

• Lateral margins of the ears
• Outher canthus of eyes
• Inner canthus of eyes
• Central nasal area (inter-alae distance)

Question 8

Inner canthus of the eye should pass tangent to

Answer 8

alae of the nose

Question 9

T/F Proportions of head width can generally be changed with treatment

Answer 9

f

Question 10

Describe nasion

Answer 10

deepest depression of the bridge of the nose in the midsagittal plane

Question 11

Nasion to subnasale is _% of facial height

Answer 11

43%

Question 12

Facial height from subnasale to menton is _%

Answer 12

57%

Question 13

In skeletal open bite cases the facial height between subnasale and menton will be (greater than/less than) 57%? Deep bite?

Answer 13

Open bite= greater

Deep bite= less

Question 14

Upper facial contour plane is defined by what two points

Answer 14

Glabella and subnasale

Question 15

Lower facial contour plane is defined by what two points

Answer 15

subnasale to pogonion

Question 16

Pogonion is where

Answer 16

most prominent point on the soft tissue chin

Question 17

What angle range btwn the upper and lower facial contour lines defines a straight face? Convex? And Concave?

Answer 17

Striaght= 8-12 degrees 
Convex= 20 degrees or more
Concave= 0 degrees or less

Question 18

Convex facial profile is associated with angles class (I/II/III) Occlusion and Concave?

Answer 18

II, III

Question 19

Long faced individuals tend to have excessive exposure of

Answer 19

maxillary incisors and gums (gummy smile)

Question 20

Normal exposure for maxillary centrals is

Answer 20

1-3 mm (male)

Up to 5 mm (Female)

Question 21

Short faced individuals have what problem with their upper lip contrary to long faced peopel

Answer 21

Lips appear protrusive and everted

Question 22

T/F Class II or III occlusion can occur in either long or short face

Answer 22

t

Question 23

Lip position is assessed how

Answer 23

relating the lips to the lower facial contour plane

or

Nasolabial angle

Question 24

In the relaxed state the upper lip at the vermillion boarder and the lower lip vermillion boarder Are _ mm ahead of the lower facial contour plane

Answer 24

3. 5 mm (upper lip)

2. 2 mm (lower lip)

Question 25

The nasolabial angle is formed by

Answer 25

the intersection of a line tangent to the columella of the nose with a line drawn from the most anterior point on the upper lip to subnasale

Question 26

Nasolabial angle averages for males and females are

Answer 26

``` Male= 100-110 degrees Female= 110-120 degrees ```

Question 27

Bidental protrusion of both the upper and lower lips ahead of the lower facial contour plane ususally indicates what for treatment

Answer 27

extractions of first premolars

Question 28

When should extractions be avoided

Answer 28

Lower lip is retrusive or when the "chin button" is excessive (Will permit "collapse" of the lower lip)