Usually, 4-6 implants are the average, but it is up to the specialist who is treatment planning your case.
8-10 are needed ideally if you have no teeth and getting an implant supported denture. 4-6 on the top arch and 4 on the lower arch. If you’re getting implant bridges that are not removable, you will need 12 minimum. 6 over 6. Huge price difference. Implant denture without extraction costs a charge around 12K-14K. Includes dentures and implants and everything. Implant permanent bridge upper and lower is closer to 45K.