It is possible to use mobile prosthetics in some edentulous cases, when the restoration of the teeth is not possible with a fixed solution due to the lack of supports (teeth) or impossibility to place implants (for clinical or economic reasons).
It is always extremely important to replace lost teeth in order to recover the mastication function, or for maintaining an occlusal balance, which are key for preventing temporomandibular joint and cervical disorders.
There are currently several removable dentures, ranging from total prosthesis (traditional dentures) to many other options that are much more pleasant to wear. If some residual dental items are present you can choose for example the removable partial denture as a solution, be it with clamps or couplings. It is a partial denture that connects to the residue teeth giving a very good stability in chewing and a good result from the aesthetic point of view.
But even in the case of total edentulous, where it is also possible to place only 2 or 4 implants, it is possible to use them as a support and anchorage for the so-called overdenture, i.e. a total prosthesis that clamps on the implants themselves with a vastly superior stability thanks to the implant support rather than mucous support.
In case of loss of a single tooth (or at least not several) it is possible to use mobile prosthetic solutions made from unilateral nylon with invisible anchorage, that are very easy to handle and with an excellent aesthetic and functional value.
When designing a mobile prosthesis, especially if it is total, there are many factors to be taken into account, and it is wrong to think that this is a simple or trivial process.
In fact, the continuous movements of the floor of the mouth and tongue together with the muscular forces make the execution of a correct mobile prosthesis very complex and difficult. The problem of the stability of the denture is related to the structure of the edentulous alveolar processes (i.e. the residual bone profile), the occlusal balance and the vertical height of the prosthesis. The concept of tongue space is very important, i.e. the correct volume that the prosthetic body needs to have with regard to the tongue organ, in order not to interfere in any way with the various functions of the latter. Even the jaw shifts forward during protrusion and laterality of the tongue, and this explains how a dental prosthesis of any kind that limits the lingual movements can also induce an altered behaviour in the same individual. The realization of the mobile prosthesis should consider very carefully the chewing ability of the molars and premolars and the most current techniques that facilitate the chewing process must be applied.