As well as no treatment, you have the option of a full denture without implant support, a denture with implant support, and conventional dental implants. A full denture has the advantage of being the cheapest but the main disadvantage of looseness and bulk. The implant denture can tackle the looseness but still has the disadvantage of bulk.
Conventional implants require bone grafting and more implants to be placed, making the treatment twice more expensive, but holds the advantage of being the most natural replacement for all your missing teeth.