I am a 60 year old woman and I've never had any orthodontic treatment and my teeth were straight. A year ago I had 6 upper and 6 lower porcelain veneers done. In about 9 months my teeth started to move so now I have a visible gap between my 2 front teeth and they're still moving - the gap is getting bigger. The other teeth don't move and I didn't have any extractions. What could be the reason? What are my options now?