Both implant and dentures are an option .
Implant is a fixed prosthesis and dentures are removable
There is another fixed option of bridge considering your adjacent teeth are in a healthy condition to support the bridge.
Next Steps
Consult a doc in your area and get the condition of your teeth and gums checked so as to best evaluate which could be the best option for you
Health Tips
Do not delay as the more you delay the More would be the bone loss limitising your choice for fixed prosthesis and further increasing the cost of treatment for up .