Hi Mark. I have a small crown next to my front tooth which I have had for nearly 20 years, which keeps falling out. I have been told the gap is too small for implants or screw in teeth. What are the options I have? If I have to keep it what is the best way of making sure it stays attached to my other teeth as it is very embarrassing.  It is right at the front of my smile. It has been stuck in with cements three or four times but they don’t seem to be able to secure it. Thank you for your reply in advance.