Clincial analysis of facial form

Question 1

what matters from the frontal view

Answer 1

Symmetry
Vertical and transverse facial proportions
tooth display

Question 2

what matters from the lateral view

Answer 2

Anteroposterior jaw relationships

inciscor protusion or retrusion

Question 3

what is done first when looking at the face

Answer 3

evaluate enough facial asymmetry to cause a problem

Question 4

what side of the face tends to be larger

Answer 4

right

Question 5

what is often included in facial asymmetry

Answer 5

mandible

then nose

Question 6

what tends to be off in many asymmetric faces

Answer 6

nose

chin

Question 7

how far does the mandible deviate before it is noticable

Answer 7

4mm

Question 8

what is the second most important symmetry relationship

Answer 8

midline of the upper and lower dental arches to the skeltal midline

Question 9

what is the maximum tolerable value of midline shift

Answer 9

2.9mm

Question 10

how can the width of the face be devided

Answer 10

central region and 2 lateral regions on each side

- all roughly the same width

Question 11

how wide should eyes be

Answer 11

the same width of one eye is the distance between the eyes

Question 12

how wide should a nose be

Answer 12

the same as the distance between the eyes

Question 13

how wide should a mouth be

Answer 13

inter-pupillary distance

Question 14

how wide should the mandible be

Answer 14

at the gonial angles, it should equal the width across the eyes

Question 15

how is the face devided vertically

Answer 15

highline to bridge of nose
bridge of nose to bottom of nose
bottom of nose to chin
- equal, iwth bottom a bit longer

Question 16

where should the mouth be placed on the face

Answer 16

1/3 of the distance from the nose base to chin

Question 17

how much tooth display is there at rest

Answer 17

2-4 mm(more in younger children)

Question 18

how big is the enjoyment smile

Answer 18

enough to show gingiva

Question 19

how big is the social smile

Answer 19

100% exposure of max incisor with small amounts of gingiva - minimal
-75% of incisor is minimum

Question 20

what happens if the buccal corridor is large

Answer 20

non-asthetic, and should widden mouth

Question 21

what happens if buccal corridor is too smile

Answer 21

undo the wideness

Question 22

what is the smile arc

Answer 22

relationship of the curve of the lower lip on smile to the contours of the maxillary dentition

Question 23

what is the ideal smile arc

Answer 23

follows that of the lower lip

Question 24

what is the deal breaker of smile evaluation

Answer 24

smile arc- cant overcome with other aspects of ortho

Question 25

what do contours of the soft tissue repressent

Answer 25

the bony tissue underneith

Question 26

what is the problem with skeletal class II

Answer 26

hard to make normal dental occclusion possible

Question 27

how much of the population is class III

Answer 27

1-2%

Question 28

short faces are associated with what occlusion

Answer 28

deep overbite

Question 29

what are the 6 major q’s to be answered in facial form analysis

Answer 29

• what is the anteroposterior position of each jaw and how do they relate
• what are the vertical facial proportions, especially the lower 1/3
• is the face symmetic
• are the upper incisors in the center of the face, are the buccal corridors normal
• are incisors correctly possitioned so that incisor display in optimal
• do they provide correct lip support

Question 30

how is lip position and incisor prominence evaluated

Answer 30

viewing the profile with lips relaxed and observing the position of the upper lip relative to the true vertical line through the concavity at the base of the upper lip
the position of the lower lip relative to a true verticle line through the bottom of the concavity between the lip and chin is observed

Question 31

when are the anterior teeth seen as excessively protrusive

Answer 31

when lips are prominent, impcompetent(separated) and strained on clusre