I've got a bridge & have had it since I was approx 13 yo and am now 33 yo (so about 20 yrs I've had it) About 3 weeks ago it come unstuck (I was chewing on a minty, although it had felt loose the week prior). I just went to the dentist & got it rebonded. He did say that it probably won't last as long as it did the first time.

Initially to clean it they gave me a special floss that inserts between the gap of your gum & the false tooth, but when the gum grows over you won't need to do that again. You just brush & floss in the usual way. The only thing I don't like about the bridge is that it is metallic (they may be different now) and it looks like I have a mouth full of fillings....