What is a partial denture, and what does it do to your remaining teeth?

False teeth fall into two broad groups: a full denture if all the teeth are missing, and a partial denture if you still have some teeth. A partial denture puts artificial teeth in place of the missing ones and takes its hold from the remaining natural teeth. It is not cemented like a bridge or screwed in like teeth on implants; it is taken out and put back in every day. For general information about false teeth and getting used to them, see our page on false teeth; here we have covered only the topics specific to partial dentures.

The types differ by material. An acrylic partial denture is made entirely of pink plastic; it is quick to make and less costly, but thicker. The Oral Health Foundation in the UK writes that a poorly designed acrylic partial denture can press on the natural teeth and gums, and that over time this can affect the health of the remaining teeth. That is why an acrylic denture is often chosen for a transitional period; for long-term use, its design needs to be done with care.

A metal framework denture, often called a 'skeleton denture' or 'clasp denture', has a framework cast from a thin cobalt-chrome alloy; the artificial teeth and the gum-coloured part are attached to this framework. It is thinner, lighter and more durable. The same source states one condition plainly: a metal denture is suitable only if there are strong natural teeth to support it. A flexible denture, meanwhile, is made from a plastic that bends; instead of metal clasps, it holds on by gently wrapping around the teeth, and it often does not cover the palate.

Each part of a metal framework denture has a job, and knowing their names makes it easier to follow what is said at your consultation. The clasp is the arm that wraps around a tooth and stops the denture lifting out. The rest is a small extension that sits on the biting surface of the clasp tooth and stops the denture sinking into the gum. The major connector is the part that links the two sides: a palatal strap or plate in the upper jaw, and a bar that runs behind the tongue in the lower jaw. The base is the part that the artificial teeth sit in and that rests on the gum.

The Kennedy classification that dentists use distinguishes four types according to where the gaps are. In Class I, back teeth are missing on both sides and there is no tooth behind the denture for it to rest on; in Class II, this is the case on one side only; in Class III, there are teeth at both ends of the gap; in Class IV, front teeth are missing on both sides of the midline. In a 1992 study that counted dentures made at a regional dental laboratory in the USA, lower dentures were more common than upper ones, and the most common type was Class I in the lower jaw; 40 per cent of the dentures were Class I, 33 per cent Class II, 18 per cent Class III and 9 per cent Class IV.

This classification tells you something directly. If there are teeth at both ends of the gap (Class III), the denture rests on teeth at both sides and the teeth carry most of the load. If there is no tooth at the back to rest on (Classes I and II), the back part of the denture sits on top of the gum; when you chew, the gum gives a little, but the teeth do not. That is why the denture rotates slightly around the rearmost clasp tooth and puts sideways force on that tooth. In lower jaws with missing back teeth, the denture moving more and the clasp tooth being put under more strain are the result of this mechanism.

What happens to the clasp teeth is a question that has been measured. In a study at the University of Regensburg in Germany that looked at 174 clasp dentures made over 25 years, the proportion of dentures still in use without being replaced was calculated at 96.4 per cent at five years and 89.8 per cent at ten years. The part that broke most often was the clasp (16.1 per cent of dentures). Decay in the clasp teeth was seen in 31.6 per cent of patients, and gum inflammation around the clasp teeth in 35.6 per cent; according to the study's calculations, the proportion of time without decay was 58.4 per cent at five years and 39.6 per cent at ten years. The median follow-up was 3 years; the ten-year rates are statistical estimates made from this follow-up. Loss of a clasp tooth was also a common problem.

A broader picture comes from a systematic review published in 2025. Bringing together 46 studies and 4,359 dentures, the review found a five-year survival of 95.1 per cent for clasp dentures and 91.7 per cent for dentures held by telescopic crowns, with no difference between them. Tooth mobility and pocket depth did not change, while the index showing gum inflammation increased. Over five years of follow-up, clasp teeth were found to be more likely to be extracted (odds ratio 1.99; confidence interval 1.32 to 3.01, in other words about twice as likely); teeth that had lost their vitality had around three times the risk of extraction (hazard ratio 2.96; confidence interval 2.02 to 4.34).

These figures do not say that a partial denture is a bad treatment; the review's authors also write that they found few periodontal changes in the remaining teeth. What they say is this: the denture puts work on the clasp teeth, and the health of those teeth depends on cleaning and check-ups. If the remaining teeth are already few and weak, it is worth discussing putting the load on implants rather than hanging the denture on those teeth.

The decision is made not on how many teeth are missing, but on the health and position of the remaining teeth and on what you expect.

The number of appointments depends on the condition of your remaining teeth; it usually spreads over a few weeks.

1. 1

   Examination and X-rays

   The roots of your remaining teeth, the bone around them and the health of your gums are assessed. Which teeth can carry clasps is decided at this stage.

2. 2

   Preliminary treatment

   Teeth that need fillings, gum treatment or root canal treatment are treated first. Any problem that will end up under a clasp needs to be solved before the denture is made.

3. 3

   Preparing the clasp teeth and taking impressions

   Small seats may be made for the rests, and the surfaces of the teeth may be adjusted so that the denture goes in and comes out easily. A precise impression is then taken.

4. 4

   Trying in the metal framework

   The framework cast in the laboratory is tried in your mouth; it is checked that the clasps and rests sit exactly on the teeth.

5. 5

   Setting the teeth and try-in

   The artificial teeth are set in wax, and the appearance and bite are checked. This is the easiest time to ask for changes.

6. 6

   Fitting and the first check-ups

   The denture is fitted, you are shown how to put it in and take it out, and any spots that press too hard are adjusted. The check-up appointments in the first week should not be skipped.

The options below are not rivals; which one suits you is decided by your remaining teeth, your bone and your priorities.

These do not make the denture a bad one; most of them can be solved with a small job when they are noticed early.

Daily care does most to decide how long the denture lasts and how healthy the clasp teeth stay.

1. The first few days

   A feeling of fullness in your mouth, extra saliva and some sounds coming out differently are normal. When putting the denture in or taking it out, do not pull it by the clasps; hold it by the base, or the clasps will loosen over time.

2. Every day

   Take the denture out and clean it with a soft brush, not forgetting the inside surfaces of the clasps. Brush your remaining teeth, especially the clasp teeth, with the denture out, not while it is in your mouth.

3. Every night

   The NHS advises against sleeping in your denture unless your dentist specifically recommends it: food debris trapped underneath increases the risk of gum infection and decay, and there is also a risk of the denture slipping into your throat while you sleep. Keep the denture in water or a cleaning solution.

4. The long term

   At regular check-ups, the clasp teeth, how well the clasps sit and the gum under the denture are assessed. Because the gum and bone change over time, relining may be needed.

A partial denture is not a one-size-fits-all product; its scope is determined by the items below:

Material

Acrylic, metal framework and flexible dentures need different laboratory work. A metal denture usually costs more than an acrylic one but is more durable.

Preliminary treatment of the remaining teeth

Teeth needing treatment for decay, root canals or gum problems are separate items. X-rays show this from the start, and it should be included in the plan.

One jaw or both

Partial dentures in both jaws, or a full denture in one jaw and a partial in the other, mean different stages and a different workload.

Maintenance and repairs

Clasp repairs, relining and adding a lost tooth to the denture add to the total over the years. The decision should be thought of as spread across years.