Week 10 Invisalign - I have bone loss on the lower teeth and the teeth are now very loose. What is the best course of action?

My orthodontist had suggested a wire on the back of the teeth after completion of treatment. and seeing a periodontist at that point. I'm concerned that without a guard the teeth would fall out when eating anything hard - ie apple. 1. I'm concerned about proceeding further with Invisalign. 2, Would teeth have a better chance of stabilizing with gradually moving back to old position (using old trays)? 3. see a periodontist at this point -bone grafts?