There are no hard and fast rules as to whether extraction of wisdom teeth are mandatory.
However, the nature of clear aligner treatment requires the best wrap around of the plastic to fit and move the teeth in a predictable fashion. Depending on the severity of your overjet AND the angle of the wisdom teeth, these wisdom teeth may need to be extracted.
The priority is that there is no obstruction from the wisdom teeth. This is illustrated below:
As you can see, if the plastic at the back needs to be cut to accomodate an impeding wisdom tooth, this compromises the overall wrap around of the clear aligner. We want the optimal fit and grip to allow for predictable tooth movements so for most cases, I do recommend wisdom teeth extractions before starting on clear aligner treatment.
Hope this helps!
Regards,
Dr Beth
