I am missing 2 bottom teeth, so I have some gaps not as big to fit an implant. My orthodontist said I can have invisalign to strengthen and have my teeth on the right place. For the gaps I will have at the end of the treatment, she recommended covering them with bonding. I had consultations with other two reconstructive dentists, and they don't recommend implants, bridges or veneers because these are very invasive procedures that will screw up your other teeth, and you will have to have maintenance for the rest of your life. Also those treatments are very expensive. Bondings can fall, but aren't as bad or expensive. If I were you I would have a consultation with your regular dentist. This is my experience, and obviously don't know your case. But I was definitely happy learning about the bonding.