lecture 6

Question 1

tooth eruption sequence

Answer 1

1. variability (perm more and primary not)
2. gender differences

Question 2

what gender is ahead in calcification except for third molars?
and ahead by how much time

Answer 2

girls are by 5-6 months

Question 3

sequence of eruption in lower arch:

Answer 3

1. 1M- 6 years
2. CI- 6 years
3. LI- 7.5 years
4. C- 10 years
5. 1P- 10.5 years
6. 2P- 11 years
7. 2M 12 years

Question 4

sequence of C, 1P and 2P in lower arch

Answer 4

canine first but 1p can be first
C-1p-2p
1p-C-2p
1p-2p-C

Question 5

sequence of eruption in upper arch:

Answer 5

1. 1M-6 years (after lower 1M)
2. CI- 7 years
3. LI- 8 years
4. 1P- 10 years
5. 2P- 11 years
6. C- 11 years
7. 2M- 12 years

Question 6

different eruption sequences explain most frequently crowded teeth:

Answer 6

maxillary canines
and
mandibular 2P

Question 7

what are 2 local influences which hasten permanent tooth eruption

Answer 7

1. localized pathosis (periapical lesions (abscess)
2. if primary tooth is extracted during active eruption of permanent tooth (more than 2.3 of the root formed)

Question 8

the increases of this are tied to alveolar process growth (both dental eruption and vertical process growth)

Answer 8

arch width

Question 9

(longer it becomes, the wider it is going to get)=

Answer 9

maxilla

Question 10

at it grows, the more constriction you get

Answer 10

mandible

Question 11

(arch width changes)
vertical alveolar process growth occurs during

Answer 11

growth spurts

Question 12

arch width changes allows:

Answer 12

1. dental eruption
2. wider placement of permanent teeth
3. apposition of alveolar bone to support teeth will result in increase in arch width

Question 13

with Intercanine Distance, once permanent teeth are in (at 10-12 years of age) the
upper=
lower=

Answer 13

upper= loses <1mm of growth
lower= stops growth

Question 14

the maxillary arch increase occurs during:
1
2
3

Answer 14

1. growth spurts
2. eruption of incisors
3. (large increase) during eruption of cuspids

Question 15

is there significant increase in intercanine width in either mandible or maxilla after the eruption of permanent canines?

Answer 15

NO

Question 16

dimensional changes in the dental arch are:

Answer 16

quite variable
different for male and female
different for max and mand arches

(max arches easy and can expand)
(mand arches are difficult and have less bone/no expansion)

Question 17

is the max arch different between sexes?

Answer 17

no

Question 18

factors of the max arch which limit loss include:

Answer 18

1. greater labial angulation of incisors
2. greater increases in arch width
3. smaller leeway space

Question 19

the curve of spee in primary dentition is

Answer 19

flat