Denture Repairs and Relines: When to Come In

A denture that fitted well for years and has started to move is not necessarily a badly made denture. More often it is a well-made denture sitting on a mouth that has changed shape underneath it.

Understanding why that happens makes the maintenance make sense, and makes it easier to judge when something needs attention rather than tolerating it. This article covers both. It is general information only and is not a substitute for an assessment of your dentures.

Why dentures loosen

The ridge of gum and bone that a denture rests on is not static. When teeth are removed, the bone that supported them gradually resorbs: it is no longer being stimulated by the tooth roots, so the body reduces it. That process is quickest in the first year after extractions and continues slowly for many years afterwards.

The denture, meanwhile, is a rigid object made to the shape the ridge had at the time. As the ridge changes, the fit between the two gets worse. Nothing has gone wrong; the mouth has moved on.

Other contributors include weight change, some medications that affect saliva, and general wear on the biting surfaces over years of use.

What a reline is

A reline resurfaces the fitting side of the denture (the part that contacts the gum) so it matches the current shape of your ridge again. The teeth and the visible part stay as they are.

A hard reline is the standard version, and it is usually done in a laboratory. An impression is taken with the denture in place, and new acrylic is processed onto the fitting surface. It is generally the more durable of the reline options. It generally means being without the denture for a period, though it may sometimes be possible to arrange this around your circumstances.

A soft reline uses a more resilient material, which can suit people with tender ridges, or a thin covering of gum over bone. Soft liners do not last as long and need replacing more often.

A chairside reline can sometimes be done in a single appointment. Convenient, though generally not as durable as a laboratory reline.

A rebase goes further: the denture teeth are retained and essentially all of the acrylic base is replaced. Considered when the base itself is worn or discoloured but the teeth are still good.

What repairs cover

Dentures crack, break in half, lose a tooth or break a clasp. Most of this is repairable, often quickly.

A clean break with both pieces available is generally the most straightforward. A denture broken into several pieces, or with a piece missing, is harder and sometimes not viable.

If it breaks, keep every piece and bring them all in, including the small ones. Do not attempt to reassemble it.

The DIY repair problem

This is worth its own section because it happens constantly and it is genuinely costly.

Household glue used on a denture is a real problem. Many adhesives are toxic, they are not designed for the mouth, and (the crucial part) they set in a position that is almost never the correct one. Once the pieces are glued slightly out of alignment, the original relationship cannot be recovered, and a repairable denture becomes a remake.

Pharmacy repair kits carry the same risk. They may hold in the short term, but if the alignment is wrong the denture will not seat properly, and it creates pressure points on the gum in the meantime.

Similarly, do not file or trim a denture yourself to relieve a sore spot. It is easy to remove too much, and the fit does not come back.

The unglamorous advice is to stop using it, keep the pieces, and ring the practice. Most repairs are considerably less involved than a remake.

When a remake makes more sense

There comes a point where repairing and relining is no longer the sensible answer:

• the ridge has changed so substantially that a reline cannot compensate
• the denture teeth are significantly worn down, changing your bite and the way your face is supported
• the acrylic has been repaired several times and is structurally compromised
• there is a crack that keeps recurring in the same place, usually a sign of a stress point that will not be resolved by another repair
• the denture no longer matches your mouth after further teeth have been lost

A partial denture can sometimes be added to when another tooth is lost, particularly an acrylic one. Cast metal partials are harder to modify, a point worth knowing when choosing between them, which we cover in our article on full and partial dentures.

Signs it is time to come in

• the denture moves, clicks or drops when you talk or eat
• you have started relying on adhesive when you did not before, or using progressively more
• recurring sore spots or ulcers
• food consistently getting underneath
• a change in how your bite feels
• visible cracks, a chipped tooth, or a bent clasp
• redness or soreness across the tissue under the plate

That adhesive point is a useful early signal. Denture adhesive is reasonable for a bit of extra confidence, but a steadily increasing reliance on it usually means the fit has deteriorated and a reline is due. It is masking the problem rather than solving it.

Keep up with check-ups

A common misconception is that having dentures means dental visits are no longer necessary. They still are.

Reviews check the fit and the state of the ridge, and, importantly, examine the soft tissues. The mouth still needs looking at for the things an examination is for, whether or not there are teeth in it. With a partial denture there is more to check: the teeth carrying the clasps take extra load and need to stay sound.

Practicalities

Denture maintenance is one of the more appointment-heavy areas of dentistry, which makes access matter. We are on Northbourne Avenue in Braddon with light rail directly outside, reachable from Civic, Dickson, Turner and the inner north. We open from 7:30am on weekdays and 9:00am to 3:00pm on Saturdays.

This is a treatment that comes up most in the older parts of the catchment: the arc through Ainslie, Hackett, Narrabundah, Deakin, Yarralumla, Red Hill and Forrest, where median ages run from 40 to 50 on the 2021 Census.

Dentures at Dental Embassy

Dental Embassy is on Northbourne Avenue in Braddon, close to Civic and the inner north. If your denture has become loose, sore or damaged, it is worth having looked at rather than worked around.

You can read more on our dentures page, call us on 1300 000 230, or get in touch.