Week 14 CE Quiz – Extraction and Impaction/Exposure Considerations (Forum 12 Retake)

One of the ways to prevent “bowing” of an aligner is to virtually “bend” and reverse Curve of Spee in the aligner.

Fake IPR is the same as virtual power thread and is not performed clinically but is recommend in extraction sites to tighten contacts during treatment.

It is advantageous to:

When activating a lever arm for an impacted cuspid, it is advised to gable bend:

It is advantageous to create a pontic that is shorter vertically in order to accommodate the helix of the lever arm.

It is possible to remove any number of attachments in a quadrant that is utilizing the G6 Anchorage Protocol.

The ClinCheck that you see does NOT represent the actual movements of the aligners.

The G6 protocol can be used only when there is crowding present.

What type of pontic tooth is the best to place for an impacted tooth?

What is the most beneficial of that approach?

When pulling on the impacted tooth, what is the best force system? An elastic from:

What is the most beneficial of that approach?

What should be the aim of the first generation of aligners?

What is the main difference comparing to fixed mechanics when doing extraction cases?

It is not recommended to apply a virtual gable bend to extraction sites with aligners.

One of the potential issues with treating premolar extractions with aligners is that the aligner can “bow”, causing steepening of the Curve of Spee and a resultant posterior open bite.