What do teeth like like after root canal treatment?

The same . . . : Teeth treated endodontically should look the same, with the exception of an access hole that is drilled on the biting surface of back teeth or the back sides of front teeth. If there is a lot of decay on the tooth, removal of it may alter the appearance of the tooth. Either way, the tooth will be filled so that it is properly sealed and most often, this is barely noticeable.