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,...

If the front tooth number 20 of this bridge is sound, it is possible to section your Bridge between number 20 and number 19 and remove tooth number 18. You cannot leave tooth number 19 attached to tooth number 20 or the laws of physics will cause tooth number 20 to fail quite rapidly. Think of a...

It all depends on the condition of the tooth and bridge. You should first get the root canal finished. Your dentist can evaluate the amount of destruction in the tooth by clinical exam and x-ray. If there is minimal destruction, no open margins, and no rocking of the bridge, then the hole can be...

It was common practice early dys but now not. now a day its not recommended. because that increases implant failure rate, but when situation is compromised and other options are not open in that case it is advisable.