There are some other kinds of full and partial dentures that differ from traditional permanent dentures including a type called immediate dentures. These dentures are created before the teeth that are being replaced with dentures have been removed and are used immediately after tooth extraction and during the healing process, which can be up to six months long. These dentures can be more easily refitted than permanent dentures to accommodate for mouth changes as the swelling in the gums and jaw subsides while healing. The immediate dentures will be disposed of once the healing process is complete and your mouth is ready for permanent dentures.
Full or partial dentures consist of a gum-colored base made of plastic resin, which fits over the remaining alveolar (bone) ridge that formerly held the teeth. The prosthetic teeth projecting from the base are designed to look and function just like your natural teeth. Dentures are held in place primarily by the suctioning effect of their close fit against the alveolar ridges — that's why it's so important that they are fitted properly. The upper denture also gets extra support from the large surface area of the roof of the mouth (palate), which generally makes it extremely stable.
Teeth can fall out for a number of reasons, ranging from genetics to drug abuse. Most commonly, teeth are removed or fall out on their own due to severe tooth decay. Neglect to upkeep oral hygiene or not seeking proper treatment for damaged teeth, can lead to the onset of decay which in turn leads to loss of teeth. Visiting you dentist in 6 month intervals is a good preventive measure to spot any early signs of decay.