growth and development of dentition review

Question 1

best way for assessing growth and time for ortho treatment

Answer 1

1) skeletal age - lateral cephs
2) width, height, and inferior border of the vertebrae

Question 2

dental age is determined by the

Answer 2

1) amount of development of permanent teeth
2) which primary teeth exfoliated
3) which teeth erupted
4) the amount of root resorption of the primary teeth

Question 3

rate of growth of a child

Answer 3

1) declines rapidly infancy
2) declines in childhood
3) increases in puberty
4) declines through adulthood

Question 4

girls and boys

Answer 4

1) girls develop sooner and complete faster

Question 5

scammons growth curve

Answer 5

1) neural - maxilla
2) somatic - mandible
3) convex => straight profile

Question 6

eruption sequence of deciduous teeth

Answer 6

1) centrals, laterals, 1st molar, canine, 2nd molar

Question 7

eruption hematoma

Answer 7

1) fluid and blood in the follicular sac
2) self limiting on rupture during gingival emergence
3) asymptomatic
4) dark blue and black

Question 8

anatomy of primary teeth

Answer 8

1) primary teeth crowns are shorter
2) pulp horns are closer to surface
3) enamel and dentin and thinner
4) roots are longer and slenderer in relation to crown size
5) more cervical constriction

Question 9

primate spaces

Answer 9

1) mesial to upper canine and 4 mm
2) distal to lower canine and 3 mm

Question 10

incisal overbite

Answer 10

1) vertical
2) mm or %

Question 11

incisal overjet

Answer 11

1) protrusion
2) horizontal
3) mm

Question 12

molar relationship

Answer 12

1) distal step
- class II
2) flush
- class II to I
3) mesial step
- class I
4 )exaggerated mesial
- class III

Question 13

canine relationship

Answer 13

1) upper primary canine
- cusp tip is distal to the lower

Question 14

development of primary dentition

Answer 14

1) splayed appearance of upper incisors
2) diastema
3) incisor liability
- 4 maxillary permanent incisors are 4 mm larger than the primary teeth
(should be 7.6 mm larger)

Question 15

leeway space is

Answer 15

1) 0.9 mm per quadrant in upper
2) 1.7 mm per quadrant in lower
- as the permanent teeth come in

Question 16

primary tooth eruption starts at age 6 months and completes at age 4

Answer 16

1) no it completes at 24 months

Question 17

is typically associated with crowding

Answer 17

1) false

Question 18

primary force as eruption is due to

Answer 18

1) muscles of tongue and muscles of mastication

Question 19

dental arch grow continues in the permanent dentition especially posteriorly

Answer 19

1) true

Question 20

mixed dentition ranges from

Answer 20

1) age 8-10 years

Question 21

primary force of the teeth in dental arches come from

Answer 21

1) muscles of mastication, tongue and included erupting permanent teeth

Question 22

primate spaces typically remain open

Answer 22

false

Question 23

amount of growth is moderate and steady until puberty

Answer 23

1) false

Question 24

in the mixed dentition phase, where there has been loss of a primary molar

Answer 24

1) the amount of space loss will be dependent on the eruption phases of the adjacent teeth/active eruption