Understanding why relapse happens makes it much easier to stay consistent with retainers and protect the result you paid for.

Why teeth move after treatment

When teeth are straightened, they’re moved through bone, and the supporting structures — the periodontal ligament and surrounding bone — need time to reorganise and stabilise around the new position. For months after treatment those tissues are still settling, so teeth are especially prone to drifting back toward where they were. On top of that, teeth shift naturally throughout life regardless of orthodontics, which is why even people who never had braces can see crowding appear in their thirties and beyond.

The first year is critical

Relapse risk is highest in the first six to twelve months after braces or aligners come off, while the tissues are still remodelling. That’s why most orthodontic plans call for wearing a removable retainer full-time at first, then stepping down to nights only. Skipping wear during this early window is the most common reason teeth start to crowd again, and once they’ve shifted, getting them back usually means more treatment.

Types of retainer

There are two main kinds, and many people have a combination. Removable retainers — clear plastic ones that look like aligners, or the traditional wire-and-acrylic type — are taken out to eat and clean, and are typically worn at night long term. Fixed (bonded) retainers are a thin wire glued behind the front teeth that stays put 24/7 and is invisible from the front; they’re excellent for holding the front teeth but need careful cleaning and occasional checks. We’ll advise which suits your case.

How long do you need to wear them?

The honest answer is indefinitely, if you want to keep your teeth straight. Most people move to wearing a removable retainer just at night, and even a few nights a week can be enough once things are stable — but reducing too far or stopping altogether risks gradual movement. Think of it like keeping up exercise: a small, ongoing habit maintains the result. A fixed retainer does this passively, but still needs monitoring.

Caring for your retainer

• Clean removable retainers daily — brush gently with cool water and mild soap, not hot water (which warps them)
• Store them in their case, never wrapped in a napkin where they get binned
• Keep them away from pets, who love to chew them, and out of car dashboards and hot water
• Clean around a fixed retainer carefully with floss threaders or interdental brushes
• Bring retainers to check-ups so we can inspect fit and the bonded wire

If your retainer breaks or stops fitting

Don’t leave it — even a couple of weeks without retention can let teeth start to move. If a removable retainer cracks, warps or goes missing, or a fixed retainer wire comes loose, contact us promptly for a repair or replacement. If your retainer suddenly feels tight, that’s often a sign your teeth have already begun to drift, and it’s worth getting checked sooner rather than later.

Book a retainer check

Whether you finished treatment with us or elsewhere, we can review your retention, replace a worn or lost retainer, and make sure your result is holding. Patients across Winmalee, Springwood and the Blue Mountains are welcome to book a retainer check.

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