A member asked:

For people who only wear their invisalign retainers when they are awake and do not clench their teeth, will natural molar extrusion be impeded?

2 doctors weighed in across 2 answers

Yes: with invisalign need to wear them at least 22 hours a day. when you take them off specially if there is posterior open contact yes the molars can extrude.

Answered 1/5/2020

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Passive erutipn: Any tooth without an opposing tooth in the other arch will erupt seeking contact. Retainers will prevent this normal physiologic change.

Answered 2/20/2016

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