This article is general information for our patients, not a diagnosis. If something in your mouth hurts, changes, or worries you, have it examined.
We look after a lot of dentures at our Barrie practice, and the same questions come up again and again. So here’s the owner’s manual I wish came with every denture: what to expect, how to care for it, and what to do when something goes wrong.
One thing up front, because it shapes everything below. A loose or sore denture is a symptom, not a diagnosis — and the same symptom can have very different causes. What it actually points to only becomes clear when I read the whole picture together: what’s changed for you, how the denture sits and bites in your mouth, how the gum underneath looks and responds, and sometimes an X-ray of the ridge beneath. Any one of those alone can mislead. So use this to understand what you’re noticing and how soon to come in — not to land on the answer yourself.
What exactly is a denture?
A denture is a removable set of replacement teeth. A complete denture replaces every tooth in a jaw; a partial fills gaps while your own teeth share the load. Both rest on your gums and come out for cleaning.
A complete denture stays put through suction, a thin film of saliva, and — more than most people realize — your lip, cheek and tongue muscles, which learn to hold it steady.
Partials come in two main builds, and which one suits you is a decision we make together:
| Plastic (acrylic) | Metal framework (cobalt-chrome) | |
|---|---|---|
| Feel in the mouth | Thicker, covers more gum | Thinner, less bulky |
| How it’s supported | Rests mainly on your gums | Sits on your teeth, gripped by small metal arms |
| Adding a tooth later | Usually straightforward | More difficult |
| Often chosen when | Several teeth missing, or more extractions expected | Remaining teeth are healthy and stable |
| Durability | Can crack if dropped or flexed | Framework is very durable |
If you’re weighing a denture against a bridge or implant, here’s my guide to all the ways to replace missing teeth.
What should I expect in the first weeks?
The first two to four weeks tend to be the most awkward; most people are comfortable somewhere between one and three months. A new denture is a foreign object, and your mouth treats it like one at first :
- Days 1–3: It feels enormous — your tongue and cheeks haven’t mapped it yet. Extra saliva is a normal response to anything new in the mouth and settles on its own.
- Week 1–2: Speech sounds odd to you (less so to others); reading aloud ten minutes a day speeds it up. Sore spots often appear now — small points where the denture presses harder than the gum likes.
- Weeks 2–6: Eating gradually normalises. Start with soft food cut small, and chew on your back teeth on both sides at once. The front teeth are set for your smile and speech, so biting into an apple tips the denture — cut and chew instead.
- By 1–3 months: Most people stop thinking about it for hours at a time.
Two asks from me. Come to your review appointments — sore spots are usually a two-minute fix. And don’t adjust the denture yourself — home fixes nearly always make the proper fix harder.
One special case: an immediate denture is fitted at the same appointment as your extractions, so you’re never without teeth. It stays in for the first 24 hours (remove it too soon and swelling can stop it going back in), and it needs a reline — a fresh fitting layer added inside — at roughly six to nine months as the healing gums shrink. That’s expected, not a fault.
Will dentures work like natural teeth?
Honestly, no. Complete dentures give roughly 20–25% of natural chewing force, because the load goes through your gums rather than tooth roots anchored in bone. Tough steak and raw carrots take more effort and smaller pieces — not that they’re off the menu. Chewing with dentures is a learned skill that genuinely improves over the first months. Where a lower denture stays frustrating, there’s a well-established upgrade path (below).
How long do dentures last — and what’s a reline?
Most dentures need a reline every few years and a full replacement roughly every five to ten. The reason is simple: your denture stays the same, but your mouth doesn’t. The bony ridge underneath slowly shrinks (faster in the lower jaw), so a denture that fit beautifully in year one can be rocking by year four.
| Option | What changes | When it makes sense |
|---|---|---|
| Reline | A fresh layer is added to the gum-facing surface; teeth and bite stay | The fit has loosened but the teeth are still sound |
| Rebase | All the pink base is replaced; the teeth stay | The base is stained, repaired or worn |
| New denture | Everything is remade | The teeth are worn flat, the bite has changed, or repairs keep recurring |
Signs a denture may be due for attention: it loosens when you talk or eat; food collects underneath; new sore spots keep appearing; the teeth look worn flat, or your chin and lips look more “collapsed”; or you spot hairline cracks or a chipped tooth. A yearly check covers all of this — and never just the denture. I also look at the gums, tongue and tissues underneath, where the quiet problems start.
Can I add a tooth to my denture?
Usually, yes — the lab can add a matching tooth to an acrylic denture within a day or two; metal frameworks are harder to modify. If the new tooth needs a clasp (the small arm that grips a neighbouring tooth), that can usually go on at the same time. When we already expect more extractions down the road, we’ll often design a partial in acrylic for exactly this reason.
Why is my denture loose?
Looseness is the most common complaint I see, and it’s usually the lower denture: it has a fraction of the upper’s suction area and shares its space with a powerful tongue. The cause tends to sort into three groups:
- The denture — edges too long or short, a worn fitting surface, or a bite that knocks it loose. Correctable by adjustment, reline or remake.
- Your mouth — a ridge that’s shrunk over the years, dry mouth (many common medicines — blood-pressure pills, antidepressants, bladder medicines — reduce the saliva a denture relies on), or changed muscle control after illness such as a stroke.
- Both at once — common, and exactly why I examine a loose denture rather than guess over the phone.
Denture adhesive is fine as a confidence boost on a well-fitting denture — never as a substitute for a fit that has failed.
When a lower denture won’t behave despite a good fit, the next step up is an implant-retained overdenture: usually two dental implants in the front of the lower jaw, with attachments that click the denture firmly into place. You still take it out to clean, but it no longer floats. After reviewing the evidence, dental experts issued the 2002 McGill consensus: a two-implant overdenture, not a conventional one, should be the first choice for a lower jaw with no teeth — simple, predictable, and better for function. It needs enough bone and a planning conversation, but more than twenty years on it’s still the option I most wish patients knew about.
My denture broke — can I glue it?
Please don’t. Household glue sets the pieces a hair out of position, soaks into the plastic and leaves residues that don’t belong in your mouth — and a glued joint often has to be cut out before the lab can repair it properly. A clean break, brought in with every fragment, can usually be repaired within a day or two.
Dentures rarely break for no reason. A drop is the classic; a crack down the middle during normal eating usually points to the denture flexing on a worn fit — fix the fit, or it’ll break again. Keep your previous denture as a spare.
Why are my gums sore?
With a new denture, sore spots are part of settling in. On one worn comfortably for years, new soreness is information — the fit or bite may have changed, or the gum underneath may be inflamed. I mark the denture with a paste that shows exactly where it presses, then ease just that spot. Precise adjustments preserve the fit; home filing destroys it.
One safety point: after I ease a denture that’s caused an ulcer, I recheck that the sore has fully healed within about two weeks. A sore that lingers after its cause is removed needs a proper look — the same two-week rule I use for mouth ulcers of any kind. That’s the strongest reason not to quietly tolerate a rubbing denture for months.
The quick-reference version :
| What you notice | What it can point toward | What we usually do |
|---|---|---|
| Loose from the start | Edge or fit issue | Adjust or reline |
| Became loose over years | Gum ridge has shrunk | Reline or replace; discuss implants that click it into place |
| One sore spot | Pressure point or high spot in the bite | Locate with marking paste, ease that spot |
| Food packing underneath | Fit has worn | Reline |
| Red gum across the whole denture area | Denture stomatitis (a yeast-linked redness) | Cleaning plan, nights out, fix the fit; sometimes antifungal |
| Crack or chipped tooth | Drop, or flexing on a worn fit | Lab repair, then fix the underlying cause |
None of these need an emergency room, but book promptly rather than improvising at home.
How do I clean my dentures?
Brush daily with a soft brush and mild soap — never toothpaste or hot water — and let them soak out of your mouth overnight .
Do:
- Rinse and brush after meals, over a water-filled sink so a slip doesn’t become a fracture
- Use a soft brush with mild soap or a denture paste
- Soak overnight in cold water with a denture-cleaning tablet; change the solution daily
- Brush your gums, tongue and any remaining teeth — especially around teeth that clasps grip
- Keep the denture in water whenever it’s out, so the plastic doesn’t dry and change shape
Don’t:
- Use regular toothpaste — it’s gritty enough to scratch the plastic, and scratches trap plaque and stains
- Use hot or boiling water — it can warp the base
- Sleep in your dentures — gums need the overnight rest and saliva flow
- Use bleach-based soaks on a denture with metal parts without checking with us first
The “out at night” rule is the one patients most want to negotiate — and it’s a major preventable factor in the condition below.
What is denture stomatitis?
Denture stomatitis is redness of the gum under a denture that often causes no pain. It affects roughly 35 to 50% of complete-denture wearers, and the single biggest driver is sleeping in the denture. Candida — a yeast about half of us carry harmlessly — finds a warm, airless pocket under a denture worn around the clock, and the gum (most often the roof of the mouth) turns red in the exact outline of the denture. Because it rarely hurts, many people have no idea it’s there; I most often find it at a routine check.
Treatment is rarely dramatic: better cleaning, nights out soaking, and fixing a poor fit, sometimes with a temporary soft lining while the gum recovers. Where the yeast is stubborn, an antifungal applied to the denture’s fitting surface usually clears it. Persistent redness also prompts us to look for contributing factors — dry mouth, steroid inhalers, smoking, diabetes.
Whether you’re considering your first denture, struggling with one, or overdue a check, an examination tells us far more than a phone description can. This guide is part of our Adult Patient Information library. For eligible patients, the Canadian Dental Care Plan includes coverage toward dentures, relines and repairs, and our team handles the CDCP paperwork for you. Call 705-721-9229 or book through our contact page — and bring your denture, broken pieces included.
