A common moment in the dental chair: you have been told a partial denture is the right way to fill a few gaps, and then you are asked if you would prefer it in metal or in acrylic. The replacement teeth look much the same either way. What differs is the base underneath them, and that affects how the denture feels, how it is supported, how long it tends to last and what it costs.
Two ways to build the same denture
An acrylic partial is made entirely of hard pink dental plastic, with teeth set into it and, usually, bent wire clasps that hook around your natural teeth. A cobalt-chromium partial, often called a chrome or metal denture, starts with a thin framework cast from a cobalt-chromium alloy. Small areas of pink acrylic and the replacement teeth are then attached to that frame, and the clasps are cast as part of it.
Both are removable and both are cleaned out of the mouth. If you are still deciding whether a partial or a full denture fits your situation, our article on full and partial dentures covers that first step.
Metal can be thin because it is strong
Acrylic needs bulk to resist cracking, so an acrylic plate is thicker and often covers more of the palate or the gum behind the lower front teeth. Many people notice that extra coverage when speaking and eating, and some find it dulls the feel of food on the palate. A cast metal frame can be much thinner for the same strength, which leaves more of the mouth uncovered.
The frame also changes where the biting load goes. Cobalt-chromium dentures are designed with small rests that sit on prepared spots on your natural teeth, so the teeth share the load with the gums. A plain acrylic partial relies mainly on the gums for support, which can allow it to sink slightly under chewing and press on the soft tissue over time.
Metal frames tend to last longer
An Australian study from the University of Melbourne gives a useful real-world comparison. Ahmed and colleagues, writing in the Journal of Dentistry in 2024, followed 1,893 partial dentures worn by 1,246 adults. Metal-based dentures had a median survival of 73 months, compared with 45 months for acrylic ones, and dentures lasted longer when patients came back for regular maintenance. Survival in that study meant the denture did not need replacing, so it is a practical measure rather than a promise for any one person.
Acrylic still has a clear place
Acrylic is quicker and cheaper to make, and it is easy to modify. If another tooth is lost later, a replacement tooth can often be added to an acrylic denture, which is harder to do with a cast frame. That makes acrylic the usual choice for an immediate denture fitted on the day of an extraction, and for an interim denture worn while the gums settle or while implants or a bridge are being planned. Once healing is complete, some people move to a metal denture for the long term.
How the two compare
| Acrylic partial | Cobalt-chromium partial | |
|---|---|---|
| Thickness | Thicker, more coverage | Thin frame, less coverage |
| Support | Mainly the gums | Shared between teeth and gums |
| Lifespan in the Melbourne study | Median 45 months | Median 73 months |
| Adding a tooth later | Usually straightforward | More difficult |
| Time to make | Shorter | Longer, with extra steps |
| Relative cost | Lower | Higher |
| Often used as | Immediate or interim denture | Long-term denture |
Fees vary with the number of teeth, the design and the laboratory work, so a written treatment plan with fees after an examination is the reliable figure. Our denture cost guide explains what goes into the price.
What patients ask about partial dentures
Will a metal clasp show when I smile?
Clasps are placed to be as discreet as the teeth allow, but one near the front can sometimes be seen. Our article on metal and tooth-coloured clasps explains the alternatives.
Is one more comfortable than the other?
Many people find a well-fitting metal denture less bulky to wear, but comfort depends heavily on fit and on how many teeth are being replaced. Any new denture takes some getting used to.
Should I take it out at night?
Dentists generally advise removing a partial denture overnight to clean it and give the gums a rest, unless you have been told otherwise for a specific reason.
If you are weighing up a partial denture, our general dentists can examine the remaining teeth and gums and explain which design suits them. You will usually receive a written treatment plan, often by email. Current new patient offers are on our deals page, and you can book at our Melrose Park practice.
