Bone will sooner or later, receed, and will be useless, so my recommendation will be to preserve bone with: Snapindentures or ALLON4 You can certainly find a solution with this 2 proceedures ,the first one is SNAPINDENTURES,with 8 narrow implants ,8 uppers and 8 lowers you will have a removable solution that will change your life,and also there is a second proceedure ,The ALLON4,which is a screw retained bar that is connected to regular implants that are placed in strategic positions,2 tilted and 2 straight,and you will have a strong solution and also cosmetic. Based on what you say here,it seems that you are a candidate,a clinical and x ray diagnose needs to be done,and its important for you to choose the right ALLON4 Specialist. Shape,size and color can be changed and you will love the results