Dentures are a replacement for one or more missing teeth. They are removable and need to be taken out every night while you sleep. Partial dentures replace some teeth, while complete dentures replace all of your teeth.
There are various types of dentures depending on how they are made and what materials they are made of. Dentures can be made with resin or metal as their base, and they can be convential or immediate. Immediate dentures are fabricated so that they can be placed immediately after the teeth extractions, but require many adjustments and may not have an ideal fit. Conventional dentures are only initiated after the tissues have had time to heal from the extractions and because they are fabricated on properly healed gums, they have a better fit that does not require as many adjustments.
Regardless of the type of denture you get, in most cases there are several appointments required before you can walk out with the dentures in hand (or rather, mouth!). Dentures are basically prosthetics for your mouth and teeth, so they always take some getting used to before they feel comfortable. Talking and chewing may be difficult in the beginning but will feel more natural as you become accustomed to the device.