How Long Do Dentures Last? When to Repair, Reline, or Replace

I see dentures at every stage of their life: brand new, a few years old needing a reline, decades old held together with superglue (please don't do that). The question "how long do dentures last?" doesn't have a single answer because it depends on the denture, the patient, and how well the prosthetic is maintained. Here's what I've learned from years of making, repairing, and replacing them.

The General Lifespan

A well-made denture should last 5 to 10 years. That doesn't mean it sits in your mouth unchanged for a decade. Your jawbone slowly resorbs after teeth are removed — it's a natural process that changes the shape of the ridge the denture sits on. This means the fit gradually loosens over time, even if the denture itself is in perfect condition.

That's why relines exist. A reline resurfaces the inside of the denture to match your current ridge shape. Done every 2–3 years, relines keep the fit snug and extend the denture's useful life significantly.

When a Repair Is the Right Call

Dentures break. A dropped denture on a tile floor, biting into something unexpectedly hard, or just age-related stress fractures — these are normal. Most breaks can be repaired by a dental lab in 1–2 days, sometimes the same day.

A repair makes sense when the denture is otherwise in good shape. If the base is solid, the teeth aren't worn down, and the fit is still reasonable, there's no reason to replace a $2,000 prosthetic over a $150 repair.

Common repairs include midline fractures (the denture cracks in half), broken or lost teeth, and cracked clasps on partials. All of these are straightforward lab repairs that restore the denture to full function.

When a Reline Is the Right Call

If your denture is loose, rocks when you chew, or you find yourself using more adhesive than you used to, it's probably time for a reline. The denture isn't broken — your jaw has changed shape and the denture hasn't kept up.

A hard reline uses standard acrylic and lasts 2–3 years. A soft reline uses a pliable material and is ideal for patients with thin or sensitive ridges, though it needs replacing more often (6–12 months). Your dentist can advise which type is appropriate.

Relines are typically completed in 1–2 days. You drop off the denture, we resurface it, and you pick it up. It's one of the most cost-effective services in dental prosthetics.

When It's Time for a New Denture

Some signs are clear: the teeth are worn flat and no longer chew effectively, the acrylic base has yellowed or become porous despite cleaning, or the denture has been repaired so many times that the base is more repair material than original acrylic.

Other signs are subtler: the denture doesn't fit well even after a reline, your face looks different (the bite may have collapsed as teeth wore down), or the overall appearance just looks dated.

After about 10 years, most dentures have reached the end of their effective life. The teeth are worn, the base has aged, and the cumulative jaw changes are significant enough that a reline can't fully compensate. At that point, a new denture with updated measurements gives you a better result than continuing to patch the old one.

The Bottom Line

Think of denture maintenance like car maintenance. Regular relines are oil changes — they keep things running smoothly. Repairs are fixing a flat tire — quick, affordable, and worth doing when the car is otherwise sound. Replacement is buying a new car — necessary eventually, but not every time something needs attention.

The worst approach is ignoring problems. A loose denture that you tolerate for years leads to more bone loss, sore spots, poor nutrition from inability to chew properly, and ultimately a more expensive replacement when you finally address it.