There are circumstances that may prevent a tooth from achieving its complete movement as designed in the setup. Overcorrection is a method for providing sufficient pressure on a tooth to move it into the optimal position, and commonly recommended by experienced clinicians.
Overcorrection is only applied when requested by the clinician at the time of the original submission or with a revision during or after treatment. Application of overcorrection in the setup requires the clinician to tell the technician specifically:
- Which teeth to "overcorrect"
- Which direction to move the tooth with the overcorrection
- How much total overcorrection in mm or degrees (this will determine the number of additional aligners will be needed)
How much overcorrection can be estimated in 3 steps?
- For rotations - approximately 6 - 9 degrees
- For labial-lingual - approximately 0.6 – 0.9 mm
- For expansion - 0.6 – 0.9 mm
- For extrusion - 0.6 – 0.9 mm