How Long Do Dentures Last? Signs It's Time for a Replacement
The Denturist Association of BC notes that a partial or full denture can be expected to last about 5 years on average. The main reason dentures stop fitting well is not wear on the denture itself. It's that the jawbone gradually changes shape after tooth loss. If your dentures are loose, causing sore spots, or past the 5-year mark without a reline, a visit to a registered denturist is the right next step. In many cases, a reline extends the life of your existing denture. When wear is too significant, a new set gives you a better fit and a healthier mouth.
How long do dentures last?
According to the Denturist Association of BC, a partial or full denture can be expected to last about 5 years on average. That figure assumes daily cleaning, overnight soaking, and relining every 2 years as the jaw changes shape.
In practice, how long a denture holds up depends on several factors:
- Material: Acrylic complete dentures typically show meaningful wear on the base or teeth sooner than metal-framed partial dentures, which tend to hold up longer.
- Daily care habits: Dentures cleaned consistently and stored correctly age more slowly than those that are dropped, soaked in hot water, or cleaned with abrasive products.
- Rate of bone change: This varies person to person. Some patients need a reline within two years of getting new dentures; others go longer before the fit changes noticeably.
- Frequency of professional check-ups: Regular visits allow a denturist to catch small fit issues before they become major ones.
A denture that still looks intact may still be overdue for replacement, particularly if the fit has gradually shifted. Appearance alone is not a reliable indicator of whether your denture is still serving you well.
Why dentures stop fitting over time
The most common reason dentures lose their fit is not wear on the prosthetic. It is a natural process called alveolar bone resorption.
When natural teeth are present, their roots stimulate the jawbone and signal the body to maintain bone density in that area. Once teeth are removed, that stimulation stops. The jawbone gradually resorbs, or shrinks, over months and years. As the bone ridge changes shape, the denture that was custom-fitted to it no longer matches the contours of the mouth.
This process is ongoing. The rate slows over time but never stops entirely. The Denturist Association of BC recommends relining dentures every 2 years to keep pace with these changes. Relining adds material to the denture's fitting surface to re-establish contact with the changed gum ridge, extending the life of a well-made denture. At Sullivan Denture Centre, our team of registered denturists monitors this at every appointment, so small changes get addressed before they become bigger problems.
At a certain point, the cumulative change in bone shape exceeds what a reline can correct, and a new denture is the better path forward.
7 signs your dentures need replacing
1. They slip or move during eating or speaking
A properly fitted denture stays in place without adhesive during everyday activities. If yours shifts when you chew, clicks when you talk, or requires increasing amounts of adhesive to stay put, the fit has likely changed beyond what minor adjustment can address.
2. You have recurring sore spots or gum irritation
Persistent redness, sore spots, or irritation on your gums, especially in the same locations, signals that the denture is putting uneven pressure on the tissue. This typically follows from a change in fit caused by bone resorption.
3. The teeth look worn or flattened
Denture teeth are made from acrylic or resin, both of which wear down with daily chewing. Flat, smooth, or noticeably shortened denture teeth reduce chewing efficiency, can change your bite, put strain on your jaw joints, and alter your facial profile over time.
4. There are cracks, chips, or fractures in the base
Hairline cracks in an acrylic denture base weaken the overall structure and provide a surface where bacteria accumulate. A cracked denture may be repairable if it is otherwise in good condition; if the base is thin from age and wear, replacement makes more sense.
5. Your bite feels off
Changes in your jaw's bone structure affect how upper and lower dentures meet. A bite that no longer feels aligned when you close your mouth can cause jaw discomfort, headaches, and difficulty chewing even soft foods.
6. Your facial appearance has changed
A well-fitted denture supports the muscles and soft tissue of your face, maintaining the vertical dimension (the distance between your nose and chin). As dentures wear down and the jawbone resorbs, the face can begin to look sunken or collapsed, most noticeably around the cheeks and lips. A new denture, or dentures that have been properly relined, restores that support.
7. It has been more than 5 years since your last reline or replacement
The Denturist Association of BC is clear that dentures over 5 years old that have not been relined every 2 years will very likely have fit problems. If you are past that mark without a professional assessment, now is the time. Age and lack of maintenance together are a reliable signal that something needs attention.
Repair or replace: how to decide
Not every problem requires a new denture. A repair makes sense when the denture is relatively new, the base material is in good condition, and the issue is isolated: a chipped tooth, a broken clasp, or a crack confined to one area.
Replacement makes more sense when:
- The denture is 5 or more years old and showing multiple signs of wear
- The base is thin or has been repaired more than once
- The fit has changed significantly due to bone resorption
- The bite is noticeably misaligned
The best way to find out is a professional assessment. Our team can examine the condition of your current denture alongside the current shape of your gum ridge and give you a clear recommendation: repair, reline, or replacement, without any guesswork.
For more on the difference between relining and rebasing, see our full guide: Denture Relining and Rebasing: What You Need to Know.
Does CDCP cover denture replacement?
If you qualify for the Canadian Dental Care Plan (CDCP), the plan contributes a portion of the cost toward eligible denture services. Standard complete dentures do not require preauthorization. Partial dentures, immediate dentures, and overdentures require preauthorization before treatment begins. Denture repairs and relines are also eligible under the plan.
The the CDCP contribution portion depends on your adjusted family net income:
Under $70,000 - 100% of eligible costs covered
$70,000 to $79,999 - 60% of eligible costs covered
$80,000 to $89,999 - 40% of eligible costs covered
Sullivan Denture Centre accepts the Canadian Dental Care Plan and handles direct billing of their portion on your behalf. You do not need to pay upfront for the CDCP portion or submit a claim yourself. If you are unsure whether you are enrolled or eligible, Canada.ca's CDCP coverage page has full details on eligibility and covered services.
When to book an appointment
Do not wait until a denture breaks or becomes unwearable to book a check-up. Catching fit changes early through yearly visits keeps your options open. An adjustment or reline is far less disruptive than dealing with poor fit and the gum irritation that follows.
If you recognise any of the signs above, or if your dentures are past the 5-year mark without a reline, our team of registered denturists with decades of experience is ready to take a look.
Sullivan Denture Centre 5450 152 St #110, Surrey, BC V3S 5J9 (604) 577-0007 | sullivandentures.com
Free consultations available. CDCP direct billing accepted.










