Do you mean your teeth moving? If so, as long as your retainer has not been damaged or stretched in any way, then it will keep your teeth in the right place.
Your teeth may move a little during the day, especially if you're chewing hard foods, but then the retainer does it's job and makes sure that everything is kept right while you sleep.
There is no such thing as a permanent retainer! Bonded retainers are the ones that are bonded begin two, three, four, five, six, seven or eight teeth, on one or both arches. These arches do keep those teeth retained, as long as they stay bonded. Some ortho's don't use them and other's will only use them on patients with A1 oral hygiene. They have been shown to provide the best retaining, due to them working 24 hours a day. Removable retainers are still needed at night, as they retain the majority of teeth ... all those that aren't bonded to the fixed retainers.
Good luck with wearing your retainer for life!


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