When I talk my bottom row of teeth appears to slant or slope downwards, what can be done to fix this?

Will 8 set of veneers or even dental bonding slightly fix the slant appearance when I talk? I have slight relapse on my two bottom cuspid (canine) teeth. I had braces in the past for 7 years, 1 veneer on my top tooth and another top tooth has a dental implant already placed. Since I had braces for so long, one orthodontist does not think I can qualify for Invisalign or it will be the best route since the bones in my gums have already deteriorated so much from braces.