Acrylic and skeletal
Removable dentures can be partial or total. The partial removable prosthesis can be entirely acrylic or have a metal part called skeleton and are intended to replace one or more teeth. The latter are known as skeletal prostheses. There are also flexible dentures.
The partial removable acrylic dentures are the most economical and should be only temporary. However it is the most used for socio-economic reasons. This type of prosthesis is held in the mouth by retentions present in remaining teeth.
The removable surface, better known as dentures are usually acrylic and intended to replace all teeth. They are only supported by the soft tissue and underlying bone structure. Remains in the mouth by the joint action of small retention of the anatomy that remains on the alveolar bone, tongue, facial muscles, and in the case of upper dentures, the vacuum effect between the inner surface of the prosthesis and the palate (roof of mouth). The retention of these prostheses is very problematic when there is an almost total resorption of the alveolar bone. In this situation the only solution is resort to implants.
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