Traditional dentures are often unconfortable especially during eating. All on four dental implants is the name of the procedure applied on edentulous patients where only 4 implants are possible to be placed. These 4 implants are used to hold the final prosthesis avoiding the discomfort and pain caused by removable denture.
The denture could be screweed onto the implants or it could be designed to be anchored with special attachments. The benefit of the second option is that you can remove your dentures at home maintaining a better oral hygiene.