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
1.6k views
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
1.6k views
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