2026-10-09

Broken or Loose Denture? Repair, Reline, and What Not to DIY

Gloved hands holding a denture and checking a tooth with a fine dental instrument

Short answer

Most denture problems are common, expected, and quick for a professional to sort out. A broken or loose denture is usually fixed with a repair, a reline or, sometimes, a remake. Don't reach for household superglue or a DIY repair kit, and don't keep wearing a cracked or ill-fitting denture. See a dentist or dental prosthetist instead.

At a glance

A denture that used to fit usually comes loose because the gum ridge and jawbone underneath slowly shrink and change shape. It's maintenance, not failure.
A reline adds a fresh layer to the surface that sits against your gums, so the denture fits snugly again without replacing the whole thing.
Household superglue is not made for your mouth, won't hold in a wet mouth for long, and can turn a simple repair into a full remake.
Many simple repairs and relines can be turned around quickly, sometimes the same day.
Piling on more and more denture adhesive just to get through the day is usually a sign the denture needs a reline.

Broken or Loose Denture? What to Do (and the One Thing Not To)

A cracked plate or a denture that suddenly won't stay put is stressful, but it's usually a quick fix. Here's what's really going on, and the one thing you should never reach for.

A denture that snaps when you drop it, loses a tooth, or gradually stops staying put is one of those small emergencies that can throw your whole day. The good news is that most denture problems are common, expected, and quick for a professional to sort out. The bad news is that the instinct almost everyone has in the moment, reaching for the superglue, is exactly the wrong move. Here's what to do instead.

Why dentures come loose (it's not your fault)

If a denture that used to fit has become loose, wobbly or started rubbing, it usually isn't because you've done anything wrong. After teeth are removed, the gum ridge and jawbone underneath slowly shrink and change shape, and they keep changing gently as you get older. A denture is rigid, so as the mouth beneath it changes, the fit drifts. This is completely normal, and it's the reason every denture eventually needs adjusting, relining or replacing. It's maintenance, not failure.

The three ways a denture gets fixed

When you bring a denture in, it usually comes down to one of three things:

A repair. Fixing a crack or a snapped plate, replacing a false tooth, or mending a broken clasp on a partial denture. Usually straightforward.
A reline. Rather than replacing the whole denture, we add a fresh layer to the surface that sits against your gums so it fits snugly again. It's the usual answer to a denture that has simply gone loose over time. If your gums are sore or still healing, a softer, temporary lining can be used first to let the tissue settle.
A remake. Sometimes a denture is too worn, or the mouth has changed too much, for a repair or reline to do the job, and a new one is the sensible option. As a rough guide, dentures generally need replacing every three to five years.

Please, put the superglue down

This is the important part. Household superglue is not made for your mouth. Queensland Health warns that these glues bond rapidly on contact with moisture, and that you should seek help if one bonds to teeth or gums. The fumes can irritate as well. On top of the safety issue, it simply doesn't work. Superglue won't hold in a wet mouth for long, and it sets hard in a way that stops the broken pieces lining up properly. That's the real damage. Once the fit is thrown off, a repair that would have been simple can turn into a full remake. The same goes for DIY repair kits from the chemist. The Australian Dental Association's advice is simple: return to your dentist or dental prosthetist for any changes to your denture.

Who fixes them, and how fast

Dentures are repaired and relined by a dentist or a dental prosthetist. Many simple repairs and relines can be turned around quickly, sometimes the same day, so it's always worth a phone call rather than assuming you'll be without your teeth for a week. One thing not to do while you wait: don't keep wearing a cracked or ill-fitting denture and push through. A denture that doesn't sit right presses on the gum and causes sore spots and ulcers, and a cracked one can break further or cut you.

What it costs, and your health fund

As with all dentistry, there's no fixed price, so treat anything you read as indicative and ask for a quote. A repair is often one of the more affordable dental jobs, and a reline is typically a modest cost per plate, quite a bit less than a whole new denture. We claim your health fund on the spot through HICAPS, and extras cover often chips in for repairs and relines, though funds usually keep a small separate limit for them, so it's worth a quick check.

Staying ahead of it

The easiest way to avoid a denture drama is a regular check-up, even if you have no natural teeth left. We check that the denture still fits, reline it before it gets annoyingly loose, and look over your gums and the soft tissues of your mouth while we're there. If you find yourself piling on more and more denture adhesive just to get through the day, that's usually a sign the denture needs a reline, not more glue.

If your denture has cracked, dropped a tooth, or just won't behave, bring it in and let's take a look. We're on Burke Road in Kew, we welcome all health funds with HICAPS at the chair, and we're open Saturdays. Call (03) 9817 7123 or book at stradbrokedental.com.au.

Sources & further reading

Common questions

Why has my denture become loose?: It usually isn't because you've done anything wrong. After teeth are removed, the gum ridge and jawbone underneath slowly shrink and change shape, and they keep changing gently as you get older. A denture is rigid, so as the mouth beneath it changes, the fit drifts.
Can I fix a broken denture with superglue?: No. Household superglue is not made for your mouth. It won't hold in a wet mouth for long, and it sets hard in a way that stops the broken pieces lining up properly. Once the fit is thrown off, a repair that would have been simple can turn into a full remake.
Can I use a DIY denture repair kit from the chemist?: The same goes for DIY repair kits from the chemist as for superglue. The Australian Dental Association's advice is simple: return to your dentist or dental prosthetist for any changes to your denture.
How long does a denture repair or reline take?: Many simple repairs and relines can be turned around quickly, sometimes the same day, so it's always worth a phone call rather than assuming you'll be without your teeth for a week.
Is it okay to keep wearing a cracked or loose denture until it's fixed?: No. Don't keep wearing a cracked or ill-fitting denture and push through. A denture that doesn't sit right presses on the gum and causes sore spots and ulcers, and a cracked one can break further or cut you.