Do wisdom teeth make teeth crooked after braces?

The short answer

Probably not on their own. It is one of the oldest worries in orthodontics: the wisdom teeth come in, push forward, and undo years of work. The research does not back that up well. Teeth can shift after braces, but wisdom teeth are not the clear cause, and a retainer is what holds teeth where they belong.

What wisdom teeth are, and when they show up

Wisdom teeth are the third molars, the last teeth at the very back of the mouth. The American Dental Association’s MouthHealthy site says they usually appear between ages 17 and 21. That timing is part of why they get blamed. They tend to arrive a few years after braces come off, right around the time some people notice a small change in their front teeth.

Wisdom teeth do not always cause trouble. The ADA explains that problems start when there is not enough room for them to come through, or when they grow in at the wrong angle. A tooth that stays trapped in the jaw or under the gums is called impacted.

Where the crowding worry comes from

The concern is not made up. The American Association of Orthodontists notes that wisdom teeth can cause crowding and misalignment, which braces or clear aligners can correct. The ADA also lists crowding or damage to neighboring teeth among the things your dentist watches for.

The narrower question parents ask is different: do wisdom teeth push straightened teeth out of line after treatment? Researchers have looked at exactly that. A 2023 systematic review in the journal Dentistry found only 10 studies that met its standards, and it rated the majority of them as highly biased. The large majority found no statistically significant link between having lower wisdom teeth and crowding coming back in the lower front teeth. A small effect was suggested, but the authors concluded there is no clear connection, and not enough evidence to remove wisdom teeth early just to keep teeth straight.

Why teeth shift anyway

If wisdom teeth are not the main reason, why do some teeth drift? Because mouths keep changing. The AAO says our bodies and teeth naturally change over time, and that teeth can shift as we age. That can happen whether or not wisdom teeth are in the picture.

That is the job of a retainer. The AAO calls the retainer the final step after orthodontic treatment, and says a retainer is typically needed for a lifetime, though how often you wear it may drop over time. Your orthodontist will tell you the schedule. The AAO also points out a handy early warning: if a retainer suddenly feels tight, the teeth may have shifted a little. That is the moment to call, not a year later.

When wisdom teeth do need to come out

Wisdom teeth can still need attention for their own reasons. MouthHealthy lists the changes that may lead a dentist to suggest removal:

• Pain or infection, often around a tooth that has only partly come through the gums.
• Cysts near an impacted tooth, which can damage nearby roots or bone.
• Damage to neighboring teeth, gum disease, or decay that cannot be repaired.

The ADA says the decision starts with an exam and an x-ray, then a conversation between you and your dentist. It also notes that dentists sometimes recommend removal as part of orthodontic care, and that every patient is different. If the wisdom teeth stay, keep an eye on them. Floss around them and keep up regular dental visits, since the ADA says problems can still develop later.

Good questions to bring

If wisdom teeth come up at a dental or orthodontic visit, these are worth asking: Is there room for them to come in? Are any of them impacted? Is there a health reason to remove them now, or can they be watched? And how should the retainer schedule look over the next few years?

Wondering where your teen’s smile stands?

If you have questions about crowding, shifting, or whether treatment makes sense, a consultation is a good place to start. A consultation at Beeline Orthodontics is free, and it includes an exam, photos, a digital scan, and a treatment plan with an exact, all-inclusive fee in writing. It is a consultation, not treatment, and every case is planned by Dr. Tim Glesener, orthodontist. Make a beeline for our consultation request form, or call or text (704) 912-5234.

Sources

• American Dental Association, MouthHealthy, Wisdom teeth
• American Association of Orthodontists, It’s never too late for a healthier, straighter smile
• American Association of Orthodontists, Understanding retainers
• Lyros et al., The effect of third molars on the mandibular anterior crowding relapse: a systematic review, Dentistry Journal, 2023