I had 3 implants but 4 teeth removed (one implant has 2 teeth). When I was quoted they told me it would cost $14668.00 from beginning to end. Each implant was around $3000. I was lucky as the implants were covered under accidental. I did have to go to a periodontist who put the implants in. It's no fun at all. Then my regular dentist took the impressions of my teeth and put the crowns/teeth in. Over all out of pocket we had to spend $907 of the almost $15000.00. As you said, your tooth is in the back and really if it is not visable to the public I would just leave it. My teeth were all my 4 front ones so I had to get it done. But they do look great!