Interceptive Ortho 1 Flashcards
Define Interceptive Orthodontics?
Any procedure that reduces or eliminates the severity of a developing malocclusion
What shape is an upper gum pad
Rounded
What shape is a lower gum pad
U shaped
What kind of skeletal class do most babies have at birth?
Skeletal Class 2
Sometimes AOB
When does the deciduous dentition erupt?
6mths-2.5yrs
Sequence of eruption for deciduous dentition
A-B-D-C-E
Generally lowers before uppers
Differences between deciduous and permanent teeth (3)
- Incisors more upright
- More spaced
- Wear - thinner layer of enamel so more susceptible to wear
If a child has no spacing what % will develop crowding in permanent dentition
66% crowding
If a child has <3mm spacing what % will develop crowding in permanent dentition
50% crowding
If a child has 3-6mm spacing what % will develop crowding in permanent dentition
20% crowding
If a child has >6mm spacing what % will develop crowding in permanent dentition
No crowding
List 2 issues that deciduous teeth can have?
- Absent permanent successor
2. Fused teeth
Why can fused teeth be an issue?
Patient unlikely to have 2 permanent incisors to succeed these teeth (might only have 1 when they establish permanent dentition
When do 6s erupt?
6 yrs
When do 1s erupt?
7 yrs
When do 2s erupt?
8 yrs
When do 4s erupt?
10 yrs
When do 3s + 5s erupt?
11-12 yrs
When do 7s erupt?
12-13 yrs
Features of the ugly duckling stage (3)
- Spaced upper incisors
- Diasthema
- Laterals pointing distally
How many children have a diastema at 6yrs
96%
How many children have a diastema at 12yrs
7%
What happens to a <2.5mm diastema
Should close in the transition between mixed + permanent dentition
Why do most diastemas close over by 12 yrs? (3)
- Canines come in at 11-12
- They take up more space than the deciduous canine
- They shuffle the incisors together