You have two options:
Either you can go for overdentures or fixed bridge. Let me clarify you the difference between the two.
Overdenture is the one that is placed over the implants and can be removed. It needs to be taken during bed time and cleaned well. They have a good shelf life but requires adequate care.
Fixed Bridges are screwed or fixed to the implants. They are made up of porcelain fused to metal. Since bridges have a finishing of gold so their strength is comparatively very good.
So, in your case i would suggest you to go for fixed porcelain bridges. Here is a picture of a patient will whole upper fixed porcelain bridge. For more information on crowns, bridges and implants you can visit the link...http://www.identalhub.com/articlecategory-crowns-bridges-22.aspx