Your denture used to fit perfectly. What changed?
A well-fitting denture is essential to your confidence, your comfort, and your ability to eat and speak normally. When it starts slipping, cracking, or causing sore spots, it’s not just annoying — it’s a sign your body has changed and your denture hasn’t kept up.
The good news: this is normal, expected, and completely fixable. Here’s everything you need to know.
Why dentures become loose over time
The main reason is jawbone resorption. After your natural teeth are removed, the jawbone no longer gets the stimulation it needs from tooth roots. Over time, your body gradually breaks down that bone tissue, causing your gums and jaw to shrink and change shape. Your denture stays the same shape — your jaw doesn’t. That gap between the two is what causes the looseness.
Other factors can speed this up: significant weight changes, the natural aging process, clenching or grinding habits, and simple wear and tear on the denture material itself after years of daily use.
Signs it’s time to see a professional
Don’t ignore these signals:
- You’re using more adhesive than before — if you need increasing amounts just to keep your denture in place, the fit has changed.
- Sore spots and irritation — a loose denture rubs against your gums, creating painful pressure points and inflammation.
- Speech or eating problems — new lisping, clicking sounds, or shifting while you chew.
- Food getting trapped underneath — gaps between your denture and gums where there shouldn’t be any.
Any of these mean it’s time for a professional assessment, not more adhesive.
Never use super glue. Seriously.
We know it’s tempting. A small crack, a tube of super glue — quick fix, right? Wrong. Household glues contain toxic chemicals like formaldehyde that are not safe for oral use. They can cause tissue irritation, allergic reactions, and serious health issues.
You’ll also almost certainly misalign the pieces, creating an improper fit that puts uneven pressure on your jaw — which can lead to TMJ problems and accelerate bone loss. Worse, a DIY repair can permanently damage the acrylic, making a professional fix impossible and forcing you into a brand-new denture.
What professional denture repair looks like
A professional denture lab uses biocompatible, food-safe acrylics designed specifically for oral use. Our Barrie team can handle cracks and fractures in the pink acrylic base, restoring original strength seamlessly. If a tooth has chipped or fallen off, it’s replaced with a perfectly colour-matched new tooth. For patients who break dentures frequently, a metal mesh can be embedded into the acrylic for extra reinforcement.
Safe materials, precise alignment, and a result that looks and feels right.
Relines: the fix for a loose denture
A reline doesn’t change your denture’s teeth — it reshapes the underside (the part that sits on your gums) to match the current shape of your jaw. It restores the snug, secure fit you used to have.
There are two types:
Hard reline — the most common and durable option. We take a new impression of your gums using your existing denture, send it to a lab, and the old acrylic is replaced with a new, precisely moulded layer. Lasts several years.
Soft reline — uses a pliable, cushiony material instead of rigid acrylic. Ideal for patients with very sensitive, sore, or recently post-surgery gums. Less durable (needs replacing every one to two years) but significantly more comfortable for tender tissues.
What to expect during the process
It’s straightforward. You come in for an assessment where we evaluate the fit and discuss your needs. If a reline is the right call, we take an impression of your gums. For lab relines, you may need to leave your denture with us for a day — we coordinate to minimize your time without teeth. In some cases, a chairside reline can be done in a single appointment. Once complete, you return for a final fitting where we make any minor adjustments for a perfect fit.
Your relined denture will feel noticeably more snug and stable. There might be a day or two of adjustment, but that’s normal.
Reline vs. rebase: what’s the difference?
A reline resurfaces the inside of your denture. A rebase goes further — the entire pink acrylic base is replaced with brand-new, high-impact acrylic while your original teeth are preserved and reset into the new base. Think of it as giving your denture a new foundation. It’s more involved than a reline but less expensive than a completely new denture, and it’s the right choice when the base is cracked, weak, or stained but the teeth are still in good shape.
When it’s time for a new denture
Repairs and relines can extend the life of your dentures significantly, but they don’t last forever. On average, a denture should be replaced every 5 to 10 years. Signs you’ve reached that point include teeth that are worn flat (affecting your chewing and facial dimensions), a history of multiple repairs compromising structural integrity, a denture that looks stained or unnatural, or a fit so loose that even a reline can’t fully correct it.
Taking care of your adjusted denture
Once your denture has been repaired or relined, a few simple habits keep it in great shape. Remove it at night to let your gums rest. Clean it daily with a soft brush and non-abrasive denture cleanser — never regular toothpaste, which is too harsh. Soak it overnight in water or denture solution to prevent drying and warping. And keep up with your regular dental checkups so we can monitor the fit and the health of your mouth over time.
Frequently asked questions
Why did my dentures become loose? The most common reason is jawbone resorption — after teeth are removed, the jawbone gradually shrinks, changing shape and causing your denture to lose its fit. It’s natural and expected.
Can I use super glue to fix a crack? No. Household glues are toxic, will misalign the pieces, and can permanently damage the denture. Always seek professional repair.
Hard reline or soft reline — which do I need? Hard relines are more durable and suit most patients. Soft relines are for very sensitive gums or recent post-surgery recovery. We’ll recommend the right option based on your situation.
How do I know if I need a reline or a new denture? A reline works when the denture is in good condition but fits loosely. You need a new denture when the teeth are worn down, the base has had multiple major repairs, or your jaw has changed too much for a reline to compensate.
How long will I be without my dentures? Minor repairs and chairside relines can sometimes be done same-day. Lab relines may require leaving your denture with us for a day — we schedule efficiently to minimise the inconvenience.
Don’t live with the discomfort
A loose or broken denture isn’t something you should just “deal with.” Professional repairs and relines are safe, effective, and can transform your comfort and confidence overnight. Our Barrie team is here to help.
A Dental Office 181 Livingstone St. East, Suite 8, Barrie, ON L4M 6Z4, Canada Phone: 705-726-3567 Email: admin@adentaloffice.com Website: adentaloffice.ca
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