What is tooth positioner?
- Results based on technician experience
- No sequential alignment available
When did the FDA approve invisalign?
1998
In the 20th century, __________________ were the standard of care to treat the vast majority of malocclusions
Brackets and wires
The 21st century has seen _________________ “become” the standard of care
3D CADCAM
_________ is the leading company in individual CAD CAM printing
Invisalign
CAD CAM technology allows for ____________ of orthodontic movements (CAD)
modelization
Fabricate sequential aligners corresponding to the desired treatment
What is important to know about the development of the technology of CAD CAM ortho?
- This technology is 25 years old
- Constantly changing and evolving
- Considerable improvements over the years
What was aligner therapy like in the early 2000s?
- Minor alignment
- Limited correction of rotations
- No predictable vertical control
- Clear aligners push
- Clear aligners do not pull
What is a simple force applied to the crown of a tooth?
- The line of action is at a distance from the center of resistance
- A moment of force is created by the force
The majority of treatments may require more than aligners such as…
- Attachments
- Elastics
- Power ridges
- Bite ramps
What do attachments do?
- Correct rotations
- Improve root movement
- Anchorage
- Extrusion
What do precision cuts allow for?
- Class II mechanics
- Class III mechanics
- Increase anchorage
- Correct midlines
What do bite ramps allow for?
- Used to open the bite
- Placed by technician
- Level de curve of Spee by extruding and uprighting lower molars
- Less proclination of lower incisors
What is the purpose of power ridges?
- labio-lingual torque
- to place torque on teeth
Where are power ridges located?
- Placed on the aligner
- NOT on tooth surface
What are the advantages of clear aligner therapy?
- Individualize tooth movement in 3 planes of space
- Move teeth sequentially
- Anchorage control
- Disocclude teeth but still vertical control
- Continuous technological improvement
What are the most common errors for aligner therapy? Limiting the scope of the technique to…
- Intraoral scanning or impressions
- Send case to the company
- Automatic acceptance of Clincheck
- Aligner delivery to patient
- What to do when treatment does not proceed as planned??
What is important to NOT do when using aligners for treatment?
- Do not over-expand
- Do not over-procline
Clear aligners abide to the same biological rules as…
conventional brackets
