Susan,
Sorry for delay. We were on a cruise for 10 days. Fortunately, my husband's bridge stayed in his mouth. The dentist thought that it would have broken off by now.
The 4 teeth will be implanted on the right side. He can't have any on the left side, as he has a titanium jaw on that side, and the titanium comes across part of his chin. I'm not sure exactly where they will place the implants. They plan to have the four implants support a bridge that will provide teeth for the front and sides of his mouth. I don't think they will go too far back. I will let you know when I have more details.