Epidemiologic data for malocclusion
- How many people (%) have well-aligned teeth? ” about half ”
- How many (%) have severe crowding : 10%
- How many in our population are class II : 15%
- How many of those have a sere enough overject to have social prolems: half of those wiht class II
Changes in the extraction percentage between 1953 - 1998
- they wanted stability ?
Why decrease more recently
- Esthetic considerations
- concerns about stability
- Bonding (bands needed more space and were used previously)
- TMD accusations
- Treatment time
What are the typical camouflage treatments for class II
- remove premolars and fixed papliances? (upper firsts and lower seconds taken out )
What are the typical camouflage treatments for classIII
- upper seconds and lower firsts taken out
- can also take out a single lower incisor
readings not tested:
- berk nw , perception of orthodontic treatment need: opinion ocmparisons of orthodontists, pediatric dentists and general practitioners.
- Jacobs RM : profiling providers of orthodontic services in general dental practice