Rubber bands with braces or aligners: what elastics do, and the rules for wearing them

The short answer

Orthodontic rubber bands, called elastics, are small bands hooked between points on your teeth to add force in a direction braces or aligners cannot manage on their own — most often to bring the upper and lower teeth into a better bite. The American Association of Orthodontists says you are the one who puts them in and takes them out, that you should wear them exactly as prescribed, and that wearing more than prescribed can harm your teeth and jaws or slow the movement down.

Everything on this page comes from the AAO's consumer pages, read on 18 Oct 2026, plus the fee documents this site already prices braces from. Which elastics you need, where they hook and for how long is your orthodontist's call, made from your records — this desk cannot see your bite and will not guess at it.

What elastics are for

Brackets and a wire are good at lining teeth up within one arch. They are less good at moving one arch relative to the other, which is what a bite problem usually needs. The AAO's explainer on how braces work describes elastics as applying additional pressure in a specific direction, which it calls essential for correcting bite issues, and says they hook onto the brackets in various configurations to adjust teeth and jaw alignment.

Its elastics page puts it more simply: elastics are tiny rubber bands that apply extra force to a tooth or teeth in ways braces alone cannot, using tiny hooks on selected upper and lower brackets as attachment points. The configuration is custom-selected for your bite, and may run from teeth in the upper jaw to teeth in the lower jaw.

Class II and Class III, in the AAO's own definitions

Two terms come up at almost every elastics appointment. The AAO's glossary defines a Class II malocclusion as one where the lower teeth or jaw sit back relative to the upper, so the upper front teeth protrude. A Class III malocclusion is the reverse: the lower teeth or jaw sit ahead of the upper. Elastics are often described by the bite they are meant to help with, which is why you may hear your own pattern called by one of those names.

What this page will not do is tell you which way your bands should run. Two patients with the same label can need different hook points, and a pattern copied from a diagram on the internet is a pattern chosen for somebody else's teeth.

Where they hook: braces and aligners

With braces, the hooks are built into selected brackets, and the orthodontist shows you which ones to use. With aligners, the AAO says elastics are used when you already have braces or aligners in place and need extra pressure. The hook points are then set up by the clinician who planned the trays, often as a small bonded button on a tooth, and the practice will show you where they are.

Either way, the instruction is the same: practise in front of a mirror at the appointment until you can place them without help. A band that is on the wrong hook is pulling in the wrong direction for every hour it stays there.

How long to wear them, and how often to change them

The hours are on your prescription, not on a website. What the AAO publishes are the habits around them, set out below as it gives them.

• Take them out to eat or brush, then put fresh ones on. The AAO says to remove elastics for eating or brushing your teeth and to put fresh ones on afterwards.
• Replace them daily, or as often as your orthodontist says. Elastics lose their stretch as they age; the AAO warns that old or over-stretched bands can slow the alignment process.
• Treat them as single-use. The AAO says elastics are designed for single use, need no rinsing, and that a band which falls out should be replaced with a fresh one rather than reused.
• Carry spares. Bands break and get lost; the AAO's tip is to carry extras with you.
• Wash your hands first. Before putting elastics in or taking them out, every time.
• Store them cool and dry, away from sunlight. Heat weakens them.

If you run out, the AAO is clear: do not wait until your next appointment, go into the orthodontist's office right away for more. The bands you were given are the size and strength your plan calls for, which is a good reason to get them from the practice rather than from a shop.

Soreness, and when it is not normal

The AAO's page on what to expect during treatment says that if elastics are part of your treatment, some soreness when you first start wearing them is normal and should ease as your mouth adjusts. It adds that ongoing or severe pain is not expected, and that if something does not improve after a few days you should call your orthodontist.

Tenderness at the start of each new stage is the pattern people describe; pain that grows rather than fades, a band cutting into the gum, or a bracket coming loose are reasons to ring the practice rather than wait for the next visit.

Doubling up does not speed things up

This is the one instruction the AAO gives in the negative, and it is worth repeating word for word in spirit: it is important not to wear more elastics than prescribed. Doing so places excessive force on the teeth, which the AAO says can harm your teeth and your jaws or slow down tooth movement.

The temptation usually comes after a missed day, as a way of catching up. There is no catching up with extra force. The fix for a missed day is the next day's prescribed wear, and an honest answer when the orthodontist asks.

Skipping them, and what it does to the bill

Orthodontists notice. The AAO's own list of what orthodontists wish patients knew starts with wearing your elastics, and says that a forgotten band or a skipped week usually shows up in the progress the orthodontist sees. Its page on what to expect lists wearing elastics or aligners as prescribed among the things that affect how long treatment takes.

Time is money in a very literal way here. The Illinois Medicaid schedule this site reads prices periodic adjustment visits at $240.00 each and pays for eleven at most — the schedule's own cap, printed beside the line. A course that runs past what a plan or programme funds brings the extra visits back to whoever is paying. A private practice may charge a fixed fee for the course instead, but the contract will say what happens if treatment runs long, and it is worth reading that clause before the elastics stage, not after.

Running out, breaking, and latex

Bands snap; that is what spares are for. Bands that keep snapping on the same hook, or that come off while you sleep, are worth mentioning at the next visit, because a hook position or a band size may need changing.

Latex is the one material question. The AAO notes that latex is a common material in some orthodontic elastics, says that if you have a known sensitivity or allergy you must tell your orthodontist, and that many orthodontists now offer latex-free elastics. Say so at the start, not when the bands are handed over.

Do elastics change the cost of braces?

Not as a line of their own. Illinois, Arkansas and Oklahoma — the state schedules behind this site's numbers — have no separate price for elastics; they travel inside the treatment and visit lines. The 2026 UnitedHealthcare FEDVIP brochure, re-read on 18 October 2026, lists seventeen orthodontic codes as covered services and none of them is a supply line for bands. Where elastics do change the bill is through time, as above.

If you are comparing quotes, ask whether replacement packs of elastics are included for the whole course, and what a lost or broken appliance costs — the same UnitedHealthcare brochure excludes repair of damaged orthodontic appliances and replacement of lost or missing ones. What a whole course is allowed at, line by line, is on the cost working.