Treatment Techniques


In overcorrection tooth movement is continued in the same direction as originally planned, but with a little extra movement. Usually two extra steps of overcorrection are added to the treatment and the amount of movement varies according to individual physiology, root morphology and bone levels.

Why Overcorrection?
  • After correction of most types of orthodontic conditions there is a tendency for some relapse. Overcorrection is designed to accommodate for this.
  • To give extra power for specific tooth movements.
  • To remove thin air gaps between the aligner and some tooth surfaces to achieve the anticipated movement.
  • Overcorrection is most likely to be needed in Rotations, Labial-lingual alignments, Expansions and Extrusions

Planning Overcorrection
If you're planning overcorrection in the treatment, it is necessary to request it at the beginning when you are submitting the case.


In backtracking the patient is required to wear the previous aligners for a longer period than originally planned. If the teeth have gone off track, this gives them additional time in a previous aligner to move into the anticipated position.
Backtracking may be needed for the following;
  • Non-compliant patient, patient failed to wear the aligners for least 22 hours per day
  • An incisal gap
  • Inadequate tooth movements
  • Cases with tracking issues


  • A pontic is an artificial tooth on a fixed dental bridge that replaces a missing natural tooth. It reinstates its function and fills the space previously occupied by the clinical crown.
  • A tooth-shaped placeholder is formed in an aligner in the space left by missing teeth. This is called a Virtual Pontic. The aligner does not cover a tooth in this location. This creates a void in the aligner. This void can either be painted or filled to create the appearance of a tooth in that space.
Pontic Techniques
  • A virtual pontic can be left as an empty void in the aligner, or filled to look more like a tooth.
  • PVS adhesive material - The pontic void is filled with a tooth-shaded, vinyl polysiloxane (PVS) adhesive material. Although this technique looks better than the paint, the material can fall out of the aligners.

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Digital Orthodontic Care
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Milton, ON L9T 5B6

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