An implant is going to be a heck of a lot more expensive than having a bridge put in, plus from memory when I was a dental nurse, there was a chance that they wouldn't 'take' but that was years ago so I assume that they have improved things since then. The bridge is just a cap over the adjoining two teeth and and the 'tooth' in the middle of them - no different to having your teeth capped anyway. I would personally prefer to have a bridge than an implant.