Dentures tend to slip and move.
Not secured to anything, dentures can move around in your mouth, and sometimes even fall out. The dentures can also rub against your cheeks and gums, and cause your mouth to be sore. This is especially likely to happen after several years, after the jaw starts to wear thin.
Ordinary dentures don’t provide protection for the jaw.
If not exercised properly, just like muscle, bone starts to wear away and deteriorate. Dentures are quite functional, but they are not actually attached to your jawbone, and so provide little in terms of protection. After years of wearing ordinary dentures, it is likely that the jaw will start to give way, which can change the shape of your face.
Difficulty chewing & speaking.
As the dentures start to lose fit, many people find that they experience difficulties chewing and speaking. The adhesives used to keep the dentures in place fail often, and you may find that certain foods are off the menu. The palette on the upper jaw dentures is also a regular cause of discomfort for some people, who do not like the feel on their mouth.