Implant Dentures can be fixed (non-removeable) or removable.
Fixed dentures are called bridges and the dentist can remove them but they stay in 24/7. They are usually screw retained but can also be cemented on to dental abutments or chimneys that are screwed into the implants.
Removable implant dentures can snap on to attachments that are screwed into the implants. These are called Snap-on-teeth. They are removable by the patient and they can be thought of as a way to eat, talk and chew with more stable dentures. The more implants you have, the more stable the chewing experience. If someone has a 2 implant overdenture it still can move in the back of the denture and food can still find it's way under the denture acrylic. If you have a 4 implant overdenture, it will be like having 4 legs on your chair. Very stable with less rocking. Six implants can give you more hold, around the arch and can often be converted to a fixed bridge at a later date.
Many implant options can also include a bar. If implants are connected with a bar, the denture has a very stable foundation on which to sit. The denture will be reinforced with metal and have clips internally to clip on to the bar. It's an excellent option and costs more than a traditional snap-on-denture. Once you factor in the cost of the bar and metal re-inforced denture you may be close to affording a totally fixed bridge. Dr. Winter and his associates are happy to discuss what's best for you. You may require a CBCT or CAT scan to assess your bone quality and quantity to see which options are available to you.