A. If you want to use invisalign to close the gap, the best thing would be to trim the veneers back to recreate the gaps, once this has been achieved, use invisalign to close the gaps and then replace the veneers. this would be the most logical way to approach the treatment. hope this is helpful. if you email back with your contact details i would be happy to suggest a dentist that could do this for you in the area you live.