Just like your car, mobile phone, or any other product you use on a daily basis, dentures are not a once-in-a-lifetime investment. Eventually, dentures will need to be replaced. The question is, how often should denture replacement occur?
A number of published scientific studies have examined how long dentures last and have made recommendations on how often denture replacement should occur. So, in determining the timeframe for denture replacement, what exactly did these studies examine? First and foremost, these studies looked at real world denture wearers and how their dentures held up over time. These were not small studies, either. One series of studies, for example, evaluated nearly 200,000 denture wearers in making their determinations about denture replacement.
When evaluating the potential lifespan of a denture, scientific studies evaluated a number of different factors such as: 1) How well do the dentures continue functioning over time; 2) How does the fit of dentures change over time; 3) How do the physical properties of dentures change over time; 4) How do the esthetics (looks) of dentures change over time; 5) How does daily use affect the safety of dentures over time; 6) How often should denture replacement occur?
Average Lifespan of Dentures
On average, dentures last five to seven years before they need to be replaced. Published studies and the Position Statement of the American College of Prosthodontists (ACP – the leading organization of dental prosthetic specialists in the United States) recommend that denture replacement occur every 5 years. In fact, the ACP states, “They [dentures] are medical devices with limited lifespans, and should not be considered as “permanent” restorations.
Click here for more information about the ACP position statement on denture replacement
Now, I know that some of you are saying, “That is wrong! My Grandma has been wearing her denture for the last 20 years! These dentists just want my money!” For some reason, many people think that dentures will last forever. Let’s be brutally honest here; what do you have that lasts forever? Your car? No. Your television? Nope. Why should your dentures be any different? In all reality, dentures should last way less than a car. Dentures are in a dirty environment (the mouth) which has billions of bacteria and saliva that has fluctuating pH conditions. You also subject your dentures to tremendous forces hundreds of times per day while chewing food.
I am sorry, but denture replacement is reality. Granny may have kept her denture for 20 years, but trust me, you don’t want to do that.
Factors that influence denture lifespan:
- Material quality: Higher-quality acrylics and premium teeth materials may last longer before showing major wear.
- Type of denture: Complete dentures tend to experience more changes in fit over time due to ongoing gum and bone shrinkage, while partial dentures may wear differently depending on the support from remaining teeth.
- Daily habits: Teeth grinding, frequent snacking, and hard foods can wear down denture teeth faster.
- Cleaning routine: Proper cleaning helps preserve the surface, but harsh scrubbing or abrasive toothpaste can shorten the denture’s life.
- Contamination and Infection: Failure to clean your dentures on a daily basis can lead to contamination of the denture base (the pink part) with fungi and bacteria that can lead to chronic irritations and infections of your gum tissue.
- Sleeping with your Denture: Sleeping with your denture can lead to accelerated bone loss and a poor fitting prosthesis. Click here for information about sleeping with your denture.
- Denture Storage: Improper denture storage can lead to broken dentures (i.e., the denture gets knocked off the counter and breaks on the floor.
Even the best made denture of all time will need replacement over time. Why? Even if the materials the dentures were made out of were indestructible and lasted forever, the fit of your denture changes with time. When you lose teeth, your jawbones begin to shrink away in a process called resorption. Unfortunately, there is no way to stop this short of getting dental implants. As your jawbone dissolves away, the fit of your denture gets worse. This negatively impacts your ability to chew food, speak, and live comfortably. In most cases, denture replacement is the only way to remedy this situation.
Quick fact: Surveys show that more than half of denture wearers keep their dentures longer than recommended, often waiting until there’s visible damage or significant discomfort before considering denture replacement. By that time, the denture may already be harboring harmful bacteria and fungi that can cause serious problems.
Signs It’s Time for Denture Replacement
Most dentures don’t go bad overnight – the changes are gradual, making it easy to ignore problems until they become disruptive. Dentures101 Director Dr. Holtzclaw advises paying attention to subtle clues that your dentures have reached the end of their safe and functional lifespan:
1. Loose Fit and Increasing Need for Adhesive
As your gums and jawbone naturally shrink over time, dentures lose their snug fit. You may start adding adhesive just to keep them in place…and then more and more. While a reline can temporarily improve fit, repeated adjustments or the need for increasing amounts of adhesive often signal it’s time for denture replacement.
2. Persistent Odor or Bad Taste
If your dentures smell unpleasant or give you a constant bad taste despite thorough cleaning, the surface may have become too porous. Repeated cleaning of denture bases (the pink part) open microscopic holes which be colonized by harmful fungi and bacteria. While denture relines or rebases can sometimes help, the only way to completely eliminate these bad actors often requires denture replacement.
3. Visible Damage
Cracks, chips, or worn-down teeth affect how you chew and can injure your mouth. Rough areas on your denture can create sore spots in your gums leading to chronic irritation or infection. Worn teeth reduce chewing efficiency making many foods difficult to eat. This can lead to jaw muscle soreness and possible problems with your jaw joint (temporomandibular joint – TMJ). While your dentist or lab technician can sometimes repair damaged or worn dentures, the solution is often denture replacement.
4. Frequent Mouth Sores or Irritation
Ill-fitting dentures can rub against soft tissues, causing sore spots that may become infected. If you’re treating the same sore area repeatedly, your denture may have lost its fit due to changes in the mouth. While relines can sometimes fix this problem, denture replacement is often needed to solve the problem.
5. Changes in Chewing or Speaking
If you find it harder to bite into certain foods, or your speech sounds different, it could be a sign the bite alignment is off. This often happens when denture teeth wear down or the denture base no longer has an intimate fit with the underlying jawbones.
6. Recurrent Infections of Mouth Tissues
Dr. Holtzclaw warns that old dentures with heavy bacterial or fungal buildup can increase the risk of aspiration pneumonia – especially in older adults – as bacteria-laden saliva is inhaled into the lungs. In fact, numerous studies have have found bacteria from the mouth in the throat and lungs.
Why It Matters
Ignoring these signs doesn’t just affect comfort and confidence – it can have real health consequences. A timely denture replacement ensures better oral hygiene, proper function, and protection against serious infection.
Why Do Dentures Wear Out?
Dentures are designed for daily use, but the forces they endure are substantial. Published studies indicate that the average person takes nearly one million bites each year – each one applying pressure to the acrylic base and teeth of your denture. Over time, this constant stress from chewing, combined with environmental factors, and daily cleanings cause the denture to break down.
1. Continuous Chewing Pressure
Every bite and chew wears away at the structure of the denture material. Even premium acrylic teeth gradually lose their shape and surface texture, affecting both function and appearance. Worn out teeth chew food less efficiently which can lead to jaw and digestive problems.
2. Saliva Exposure
Saliva isn’t just moisture – it’s a complex fluid with a pH that changes throughout the day. Whenever you eat, saliva becomes more acidic. These daily pH fluctuations can slowly weaken the acrylic, making it less smooth and more porous.
3. Cleaning Wear and Tear
While brushing dentures is essential, repeated friction from cleaning creates tiny scratches in the denture surface. Over the years, these scratches grow and deepen, turning into a network of microscopic channels where bacteria and fungus can thrive.
In addition to brushing, dentures are also cleaned by chemical means using effervescent tablets. As dentures soak in this solution, the chemicals slowly take their toll on the physical properties of the prosthetic.
4. Gum and Bone Changes
After tooth loss, bone resorption begins immediately and continues for life. As the jawbone and gums shrink, the denture’s original fit deteriorates. Even if the denture itself is intact, the mismatch with your changing mouth can lead to discomfort and instability.
The Result
Over time, dentures become rougher, less flexible, and more likely to harbor bacteria and fungus. This not only causes odor and staining but also raises the risk of oral infections and systemic health problems like aspiration pneumonia. No matter how well you take care of your dentures, they will eventually wear out. Once this happens, which studies indicate is an average of every 5 years, denture replacement is necessary.
Can Can I Extend the Life of My Dentures?
While no denture lasts forever, proper care can help you get the most out of each set before it’s time for replacement. Dr. Holtzclaw stresses that maintenance can slow wear and reduce bacterial buildup – but it won’t stop the natural five-year denture replacement cycle. Doing the following will help make your dentures last as long as possible:
1. Clean Them Daily
- Use a soft-bristled denture brush and a non-abrasive denture cleanser (or dish soap).
- Avoid regular toothpaste, which can scratch acrylic.
- Rinse after every meal to remove food particles.
2. Soak Overnight
- Keep dentures moist to maintain their shape.
- Use plain water or a denture soaking solution – never hot water, which can warp the base.
3. Handle With Care
- Clean over a folded towel or water-filled sink to prevent breakage if dropped.
- Avoid bending partial denture clasps.
4. Store Properly
- Store dentures in a plastic or glass container while not in the mouth.
- If you have pets, store your dentures out of their reach.
5. Get Regular Adjustments
- Visit your dentist for periodic fit checks and relines as needed.
- This prevents sore spots and reduces stress on the denture from uneven pressure.
6. Use the “Old Car” Rule
Dr. Holtzclaw compares keeping dentures past their prime to driving an old car with missing parts – you might still get from point A to point B, but you’ll deal with discomfort, reduced performance, and higher maintenance along the way…and an uglier looking ride.
7. Know When to Let Go
Even with perfect care, material breakdown, fit changes, and hygiene issues eventually make denture replacement the safest choice. Good care buys you time – but it can’t make a denture last indefinitely. Denture replacement will eventually be needed.
Are Regular Dental Checkups Important for Dentures Wearers?
Many denture wearers skip dental visits once their natural teeth are gone, but regular checkups are just as important for those with full or partial dentures. Dr. Holtzclaw emphasizes that these visits are the key to catching fit issues early, maintaining oral health, and knowing exactly when denture replacement is needed.
1. Fit Assessments
Your dentist can spot subtle changes in the fit of your dentures before you notice them. A poorly fitting denture can cause gum irritation, accelerate bone loss, and lead to bite problems.
2. Wear and Damage Checks
Dentists can detect surface wear, cracks, or changes in translucency that indicate material fatigue – long before these problems become obvious to you.
3. Oral Health Monitoring
Even without natural teeth, your gums, tongue, and palate still need care. Dentists check for sores, fungal infections, or early signs of oral cancer.
4. Professional Cleaning
Plaque, tartar, and stains can build up on dentures just as they do on natural teeth. Professional denture cleaning removes deposits that home brushing and soaking can’t fully eliminate.
5. Reline vs. Replace Guidance
Sometimes a denture can be relined to restore comfort and fit; other times, denture replacement is the better choice. Regular visits help ensure you’re not using a denture past its safe and effective lifespan.
Checkup Frequency
Studies show that most denture wearers benefit from annual visits. Yes, that means you should still see your dentist every year. If you have health conditions that increase your risk for oral infections – such as diabetes or a compromised immune system – your dentist may recommend more frequent appointments.
FAQs about Denture Replacement
How often should I replace my dentures?
Most dentures should be replaced every five years. Even if they still seem functional, material breakdown and changes in your mouth can affect fit, hygiene, and safety.
What happens if I wear old dentures too long?
Over time, dentures become rougher, more porous, and more prone to trapping bacteria and fungus. This can lead to bad breath, gum irritation, and even health issues like aspiration pneumonia.
Can’t I just reline my dentures instead of replacing them?
Relining can improve fit temporarily, but it won’t fix worn-down teeth, surface roughness, or material degradation.
How do I know if my dentures need replacing?
Signs include looseness, more frequent adhesive use, cracks or chips, persistent odor, difficulty chewing, or recurring mouth sores.
Is it okay to keep dentures longer than five years if they still work?
Technically yes, just like you can drive an old car beyond its prime usefulness. Do you want to drive a rusted out clunker with a bungee cord holding the trunk shut and a big crack in the windshield? Me neither. Think of an old set of dentures like an old junked car. Car replacement is necessary just like denture replacement is necessary.
Wondering if your dentures are due for an upgrade?
Explore more expert-backed denture care guides on Dentures101. From recognizing early signs of wear to learning about the latest replacement options, we help you keep your smile comfortable, functional, and healthy for years to come.
Supporting Literature
If you are interested in learning more about the lifespan of dentures and the reasons why denture replacement is necessary, please look at the following links:
- https://pubmed.ncbi.nlm.nih.gov/39750517/
- https://pubmed.ncbi.nlm.nih.gov/34645719/
- https://pubmed.ncbi.nlm.nih.gov/35338502/
- https://pubmed.ncbi.nlm.nih.gov/35189311/
- https://pubmed.ncbi.nlm.nih.gov/32359852/
- https://pubmed.ncbi.nlm.nih.gov/20083450/
- https://pubmed.ncbi.nlm.nih.gov/26201226/
- https://pubmed.ncbi.nlm.nih.gov/19508322/
- https://pubmed.ncbi.nlm.nih.gov/16827736/