Permanent Dentition

Question 1

For the maxilla, what is the pattern of eruption?

Answer 1

1st Molar
central incisors
Lateral incisors
1st PM
2nd PM
Canine
2nd molar

Question 2

For the mandible, what is the pattern of eruption?

Answer 2

1st molar
Central in
Lateral in
canine
1st PM
2nd PM
2nd molar

Question 3

Is there more or less variability in the permanent dentition?

Answer 3

More variability

Question 4

Are girls or boys ahead in calcification and except for the third molars,

Answer 4

Girls

Question 5

girls are ahead of boys by an average of ____months in eruption

Answer 5

5 months

Question 6

1.Timing is ______ within a dentition –

Answer 6

consistent

Question 7

T/F; children who erupt any tooth early or late tend to acquire others early or late

Answer 7

True

Question 8

T/F: Both sides should erupt at the same time3.

Answer 8

Ture

Question 9

At what age should there be a Panoramic xray taken? (incisors and canine eruption)

Answer 9

9 years old:

Question 10

Different eruption sequences explain most frequently crowded teeth are what?

Answer 10

maxillary cuspids and mandibular second bicuspids

Question 11

At what point during eruption can a primary tooth be extracted?

Answer 11

2/3 of the root formed

Question 12

Local influences which _____ permanent tooth eruption
1.localized pathosis:
➢periapical lesions (abscess), pulpitis and pulpotomy? of a primary molar)

Answer 12

hasten

Question 13

When a primary tooth is extracted before active eruption of permanent tooth (2/3 of root development), this _____ permanent tooth eruption

Answer 13

Slows

Question 14

When the maxilla is measured for width, what is measured in the posterior teeth?

Answer 14

Lingual cusp to lingual cusp

Question 15

When the mandible is measured for width, what is measured in the posterior teeth?

Answer 15

Central groove to central groove

Question 16

What is the normal maxilla width?

Answer 16

40-45 mm

Question 17

The increases are tied to alveolar process growth (both dental eruption and vertical process growth)

Answer 17

Arch width

Question 18

______ changes
▪Vertical Alveolar Process Growth
▪occurs during general growth “spurts”
▪different for maxilla and mandible: divergent maxillary process translates into more arch width growth
•Dental Eruption
▪wider placement of the permanent teeth
▪apposition of alveolar bone to support these teeth will result in increase in arch width

Answer 18

Arch width changes

Question 19

During what ages does the arch width grow?

Answer 19

6-12 years old

Question 20

What happens after the age of 6-12 years old to arch width?

Answer 20

Decreases in size or maintain at best

Question 21

The maxillary width has large increases during eruption of what teeth?

Answer 21

Cuspids/canines

Question 22

NO SIGNIFICANT INCREASES IN INTERCANINE WIDTH OCCUR IN EITHER THE MAXILLA OR MANDIBLE AFTER THE ERUPTION OF PERMANENT ________

Answer 22

CANINES

Question 23

At what ages should the arch perimeter be maintained?

Answer 23

8-11

Question 24

At what ages should the arch perimeter be tinkered with for expansion?

Answer 24

11-13

Question 25

▪Variable(depends on pattern of tooth eruption) ▪Not difference between sexes ▪Factors which limit loss include greater labial angulation of incisors, greater increases in arch width and smaller leeway space

Answer 25

Maxillary arch

Question 26

▪Factors which limit loss of perimeter width in maxilla include what 3 things?

Answer 26

greater labial angulation of incisors, greater increases in arch width and smaller leeway space

Question 27

1. The maxillary arch shows greater or lesser width increases (and can also be modified) compared to the mandibular arch.

Answer 27

Greater

Question 28

______ requires interdental spacing and other factors to accommodate the permanent teeth. The average patient will still show crowding when the incisors erupt.

Answer 28

Incisor liability

Question 29

Late mesial shift in the ________helps to achieve a class I molar.

Answer 29

Leeway space

Question 30

Between what teeth does the curve of spee make its arch?

Answer 30

1st and 2nd molars