Poor photo angulation. Need a lip at rest and smile photo full face to make this determination.
photo quality makes it impossible to make a determination.need photos shot in Raw or large jpegs.
I guess it depends on material used? EMax? empress? Feldspathic? All of these materials have different properties and how was the restoration made? cut back and layered or stained and glazed?In theory you can bleach the lingual surfaces and "maintain" a tooth value but I have found this to be hard to do. If color is changing an earlier post was correct discussing the vitality of the nerve, and internal bleaching. In nature the centrals should always be slightly higher in value due to the percentage of enamel vs dentin on the facial of the tooth so i almost prefer a color gradient if it is slight!hope this helps!
If a tooth has a large infection the desired protocol is to remove tooth and infected tissue with curette and adequate irrigation. Let socket heal for about a weak to let the body manage the infected tissue. The dentist will then re-enter the site, graft, suture, and obtain primary closure. Since the tooth was grafted at time of extraction your risk of dry socket is higher. Are you a smoker? On birth control? All of these can interfere with proper clotting. Pain start 2-3 days after procedure? If so most likely dry socket.
What material was used for your bridge? porcelain stacked on metal? all ceramic (emax or zirconium)? If you see grey most likely the metal underneath is showing through the resin restoration. you can block out the metal with some very opaque flowable resins. you then use a more natural shading system to match the ceramics. It is not uncommon to see the access but is the time involved and extra cost worth it? does the access show when you smile or speak? make your concerns known to the the treating dds and see what options can be done to make the end result more esthetic