Funny you should bring this up, as I just got back from the dentist this morning, and have the same situation on my hands. I lost a tooth over Thanksgiving; actually a crown on a tooth that had a root canal.
Dentistry has become something of a racket these days, with dentists trying to sell the most expensive products, so it's hard to get a truly impartial medical opinion from them.
Anyway, the implant will be actually anchored into your gum/jaw line. This is the most expensive procedure (maybe $5,000, depending on where you are and insurance). The bridge is not actually implanted into your gum/jaw, but held in place by the teeth on either side. This might entail some reworking of those teeth. Cost is about half of the implant. I'm concerned about what happens if something goes wrong with the anchoring teeth. Also, if the teeth on either side have crowns those have to be taken out. Both will probably require an extraction or root canal first.
I think age, finances, cosmetic issues, pain/discomfort are all part of the equation. I declined all the options, since my tooth (really crown) fell out clean, it's not infected, and is not visible. It's just a blank space. Hope this helped and good luck.