Lecture 13

Question 1

Bimaxillary dentoalveolar protrusion is seen in the facial appearance in three ways, what are they?

Answer 1

• Excessive separation of the lips at rest
• Excessive effort
• Prominence of lips in the profile view

Question 2

What type of jaw relationship does a convex facial profile indicate?

Answer 2

-Class II

Question 3

What type of jaw relationship does a concave profile indicate?

Answer 3

-Class III

Question 4

What is the usual cause of excessive display of maxillary gingiva?

Answer 4

-Long face due to excessive downward growth of the maxilla

Question 5

T/F Growth of the upper lip as the patient ages typically reduces some excessive gingival display

Answer 5

True

Question 6

The chin throat angle closer to what angle is better?

Answer 6

90

Question 7

What does a flat mandibular plane angle correlate with?

Answer 7

• Short anterior facial height
• Braciocephalic
• Class IIII skeletal relationship
• Anterior deep bite

Question 8

What does a high mandibular plane angle correlate with?

Answer 8

• Long anterior facial height
• Dolicocephalic
• Class II skeletal relationship
• Anterior open bite

Question 9

The width of the maxillary dental arch as seen on smiling, should be proportional to what?

Answer 9

-The width of the midface

Question 10

What is the smile arc?

Answer 10

-Curvature of the lower lip to the curvature of the maxillary incisors

Question 11

If you have golden proportion tooth widths what is the percentage of size that a lateral should be of the central?

Answer 11

-62%

Question 12

The width of the tooth should be what percent of its height?

Answer 12

-80%

Question 13

THe length should be what percent longer than the width?

Answer 13

20%

Question 14

The lateral incisors gingival line should be how much lower than the central and the canine?

Answer 14

-.5-1.0mm