Development of normal dental occlusion in children

2. Development of
Normal
Occlusion in
Children
BY:
Ahmad Wafiq
Mennat Allah Alkaram
Under supervision of:
Professor Nagwa Khattab

3. Basic Info.

4. Basic Info.
 Primary dentition roots completed at 3
y
 6s erupt at 6 y
 Lower 3s erupt at 9 years
 Upper 3s erupt at 12 y

5. Development of normal occlusion
Pre-
dental
stage
Gum pad
Relation
btw gum
pads
Deciduous
stage
Spacing
Bite
Terminal
plans
Mixed
dentation
stage
6-7:
• Early mesial shift
• Incisal liability
• Edge to edge RX
8-9 : ugly duckling stage
10-12 : Late mesial shift
Permanent
dentation

6. Pre-dental stage : 0-6m
 Alveolar arch is called
gum pad
 In Maxilla => hoarse
shoe shape
 In mandible => U-shape

7. Gum pad grooves :
 Gingival groove
 Dental groove
 Transvers groove
 Lateral sulcus
Pre-dental stage : 0-6m

8. Relation of gum pads:
 Anterior open bite.
 Contact at molar area
only.
 Upper gum pad is more
forward = mandibular
retrognethia.
Pre-dental stage : 0-6m

9. Deciduous dentition stage: 3y
Status of dentition at 3y:
 all deciduous teeth are
erupted.
 Almost all there roots
completed

10. Spaces available at 3y :
 Generalized spacing : occurs due to jaw growth
 Primate space : Mesial to upper c , Distal to lower
c
Deciduous dentition stage: 3y
Open dentition (type I) Closed dentation (type II)
*Spacing between deciduous
teeth
*No crowding in mandible or
maxilla in permanent stage .
*No spacing between deciduous
teeth
* No crowding in maxilla but there
will be in mandible in permanent
dentition

11. Generalized spacing : Open type
=> normal

12. Primate spacing

13. Normal overbite
Deciduous dentition stage: 3y

14. Occlusion at 3 years:
Upper E to lower E relation ship at 3 years
could be :

15. Mixed dentition stage : (6-7y)
Status of dentition
at 6-7 years:
 Upper and
lower 6s are
erupted.
 Upper and
lower incisors
start to erupt

16. Bite at 6-7y :
Edge to edge :
* ware of primary
anterior
* eruption of 6s.
Mixed dentition stage : (6-7y)

17. Early mesial shift :
Mesial shift of lower 6
on expanse of
Primate space
Open type dentition
with flush terminal
plan relationship will
result in class I
occlusion .
Mixed dentition stage : (6-7y)

18. Incisal liability :
The deference btw. Space required for
upper 1,2,3 and the space available
occupied by upper A,B,C.
Corrected by :
• Increase inter canine distance
• Inter-dental spacing
• Labial inclination of upper 1,2,3
Mixed dentition stage : (6-7y)

19. Status of dentition at 8-9y
:
• Roots of 6s are
completed.
• All permanent incisors
erupted.
• Lower canine erupted.
Mixed dentition stage : (8-9y)

20. Ugly duckling
Mixed dentition stage : (8-9y)

22. Deep bite
Mixed dentition stage : (8-9y)

23. Status of occlusion
at 10-12 years:
• premolars have
erupted.
• 7s erupted.
Occlusion at 10-12 years

24. Occlusion at 10-12 years
 Leeway space :
The deference btw. The space
occupied by C,D,E and the space
required for 3,4,5.
Maxilla : 0.9mm , Mandible : 1.7
mm.
 Late mesial shift :
Occurs on expanse of leeway
space.

25. Occlusion at 10-12 years
• ↓ Diastema :
Canines have erupted
• ↑ VD :
Due to eruption of 7s =>
natural bite opener
• Leeway space
closure and late
mesial shift

27. Development of normal occlusion
Pre-
dental
stage
Gum pad
Relation
btw gum
pads
Deciduous
stage
Spacing
Bite
Terminal
plans
Mixed
dentation
stage
6-7:
• Early mesial shift
• Incisal liability
• Edge to edge RX
8-9 : ugly duckling stage
10-12 : Late mesial shift
Permanent
dentation

28. Test your self

29. Plz scan …

30. Q 1:

31. Q 2 :

32. Q 3:

33. Q 4:

35. Voice control is one of the behaviour guidance
and classified as:
a. Basic and non-pharmacological technique.
b. Basic and pharmacological technique.
c. Advanced and non-pharmacological technique.
d. Advanced and pharmacological technique.
Q 6:

36. Protective stabilization is one of the behaviour
guidance and classified as:
a. Basic and non-pharmacological technique.
b. Basic and pharmacological technique.
c. Advanced and non-pharmacological technique.
d. Advanced and pharmacological technique.
Q 7:

37. Which of the following is basic behaviour
management
a. Ask-Tell-Do
b. Ask-Tell-Ask
c. Ask-Tell-Show
d. Tell-Show-Tell
Q 8:

38. Which of the following techniques is similar to
pre-visit positive imagery
a. Modelling
b. Verbal communication
c. Non verbal communication
d. Memory restructuring
Q 9:

39. Which of the following is NOT true about
indications of protective stabilization
a. A child with frequent mouth closure
b. Facilitate dental work under sedation
c. A child with multiple cavities
d. Certain handicapping conditions
Q 10: