Acrylic Partial dentures

When you have either some or most of your real teeth left a denture that fills the gaps is called a partial denture. Acrylic (hard pink plastic) dentures can be made very quickly and are the cheaper of all the denture base options. They are several millimetres thick and it can take several days to get used to wearing acrylic partials as lisping can be an issue. However many people (a fair percentage) do find them to be a complete solution that they are very happy with when they are well made.

Acrylic Partial Dentures – The main factors behind their success or failure

Your individual adaptive capability

  • One of the main reasons that an acrylic partial fails (when well made) is the adaptive capability of the patient. This is basically how bothered you are by the denture being there. Some patients forget about their new acrylic denture after a couple of days and adapt their speech so nobody would know. On the other hand, some patients cannot get used to them at all meaning they have a poor subconscious adaptive capability. Usually having a thin chrome alloy denture solves the problem. Chrome dentures are not available on the NHS.

How well made your acrylic partial denture is

  • How well made your acrylic partial denture is!!!!  We get lots of patients who have new acrylic partials (both NHS and Private) that they cannot wear for several reasons – too thick – too far back in the palate – bite measurements are wrong (cannot chew – noisy-painful) over extended edges causing lifting and pain – loose – poor appearance – wrong design. Also constant breakages due to poor quality materials used.

Acrylic just is not strong enough because of your bite

  • If the way your teeth meet when you bite means the acrylic is limited in thickness this often can lead to breaking your partial acrylic denture even when made of the strongest Hi Impact acrylic. Believe it or not, the average human biting force is roughly 160 psi. I always equate it to your approximate body weight. This is the equivalent of standing on your denture. I repair several dentures each week and the huge majority are broken by eating bread in all its forms. I have been asking “what were you eating when it broke” for years to thousands of people. Because you know it’s soft you bite with your maximum force so as it compresses it spreads the force against the denture and breaks it. We put no conscious effort into biting hard!
  • The combination and positions of your remaining teeth. In some cases, an acrylic partial denture just is not clinically suitable.