Interceptive Orthodontics Flashcards
(120 cards)
Interceptive orthodontics
- ‘any procedure that will reduce or eliminate the severity of a developing malocclusion’
general practitioners need to be able to spot
- refer when needed
3 characteristics of deciduous dentition
incisors more upright
spaced
wear - thin layer of enamel

eruptioins of deciduous dentition
6 months - 2.5 years
a-b-d-c-e
lowers before uppers
no spacing in deciduous dentition ->
66% will develop crowding
<3mm spacing in deciduous dentition ->
50% crowding
3-6mm spacing in deciduous dentition ->
20% crowding
>6mm in deciduous dentition ->
no crowding
what is likely if there is missing or double teeth in deciduous dentiton
- fusion of central and lateral incisor
- likely Absent permanent successor

eruption dates permanent dentitions
6s
6 years
1s
7years
2s
8years
4s
10years
3s and 5s
11-12years
7s
12-13years
variation exists
6s erupt
6 years
1s eruot
7 years
2s erupt
8 years
4s eruot
10 years
3s and 5s erupt
11-12 years
7s erupt
12-13 years
early mixed dentition
6-8 years
6s, 1s, 2s erupted
late mixed dentition
10-13 years
4s, 3s and 5s, 7s
lower labial crowding that can improve spontaneously
up to 3.5mm of crowding may spontaneously improve
- Primary canines present with permanent incisors
Grow transversely naturally and improve (3.5mm till 10)

antropoid spacing
space that is localized mesial to the upper primary canine and distal to the lower primary canine

ugly duckling stage effect on upper incisors
spaced upper incisors
- diastema
- laterals pointing distally
- upper canines leaning against upper distal aspect of lateral roots as the 3s erupt the spacing will disappear
Despite mixed dentition looking spaced it is common to have crowding (need to fit in 3, 4, 5 between 2 and 6)

size of diastema that will close naturally
<2.5mm should close between mixed and permanent dentition transition
frenectomy has little effect on longterm closure of diastema - not advocated
% diastemas at 6 yeards Vs 12 Years
6years 96% have diastema
12years 7% have diastema (3’s erupted – more space than c)
what is not advocated for diastema management
frenectomy - little effect on long term closure
4 things needed to know about development of mixed dentition
- knowledge of normal
- sequence
- symmetry
- chronological guidelines



































































