Overcorrection

For information regarding overcorrection, refer to the following:

• Definition
• Uses
• How to...

Definition

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.

Uses

Overcorrection is commonly needed for these types of movements:

• Rotations
• Labial-lingual alignment 
• Expansion
• Extrusion 

How to...

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