Can dental bridges always be replaced when they go bad? How can you tell when they go bad?

I prefer to use dental implants over bridges when possible.  That being said,  bridges are fine restorations and If you already have had two placed I would leave them.  It would be a considerable time and expense to change to implants at this point, if it was even a possibility. 

Hi there, I think you should evaluate your existing natural teeth for individual crowns and also evaluate the pontic area (the place where the middle tooth is missing) for a dental implant. I would recommend you see a periodontist for an evaluation.

Unfortunately you're describing the nature of a bridge. The teeth are 'glued' together making cleaning difficult. You'd need more implants to have separate teeth. That being said, your teeth do look a bit opaque to me in the picture...which may just be the flash.If you don't like the appearance,...