Growth and Dev III

Question 1

Where is primate space located?

Answer 1

Mesial to max canines

Distal to man canines.

Question 2

Permanent teeth erupt where in relation to primary teeth?

Answer 2

Lingual.

Question 3

What is early mixed dentition? Late?

Answer 3

Early= Eruption of perm first molars and incisors
Late= Eruption of remaining perm teeth.

Question 4

What is the arch length/depth?

Answer 4

Distance from a line perpendicular to mesial surface of permanent first molars to a point between central incisors.

Question 5

What is arch circumference?

Answer 5

Sum of MD diameters both left and right.

Question 6

What is incisor liability?

Answer 6

Permanent incisors are larger than primary and can cause some crowding.

Question 7

What is leeway space? How much space in man and max?

Answer 7

excess space available due to primary molars being bigger than permanent premolars..
Man= 2.5 mm/ quad
Max= 2.0 mm/ quad

Question 8

Primary distal will turn into what permanent relationships how?

Answer 8

Distal–>Class II with minimal growth.
Distal–>end to end with forward movement of mandible.
Distal–> In between with shift of leeway space

Question 9

What contribute to primary to permanent molar relationships?

Answer 9

• Differential growth of jaws
• Forward growth of man
• Sufficient leeway space.

Question 10

Arch perimeter decreases by how much in permanent dentition?

Answer 10

4 mm

Question 11

Primary Flush will turn into permanent relationships how?

Answer 11

Flush–>End with minimal growth.
Flush–>Class I with forward growth of mandible.
Flush–>In between with shift of leewayspace

Question 12

Mesial step will turn into what how?

Answer 12

Mesial–>class I with minimal growth.
Mesial–>Class III with forward growth of mandible.
Mesial–>In between with shift of leeway space