How would an endo retreat this?

[Kennethk]

On my bottom two it looks like infection is spreading, the dentist said it was far from needing to be extracted however I'm curious is it a simple case of just redoing the root canal? Since these are nearly 15 year old root canal treatments.

 

[MattKW]

No, closing it with crowns will only irritate the gums more. This is something you have to live with and keep clean with interproximal brushes. In any case, you won't expose this when you smile so no-one will see it.

 

[Kennethk]

Never seen this happen before after rct healing it looks like porcelain is chipping away from brushing or maybe it's dead gum tissue growing over hard to say