Grey gum after front tooth implant? (photos)

Whether this is a temporary or permanent situation really depends on whether what I am seeing is a metal healing cap that is showing through the tissue, or whether it is the actual body of the implant. In thin biotypes such as yours, the translucency of the area could cause a reflection of light through the tissue once it reflects off the implant surface. I would be evaluated for a possible soft tissue graft before your final crown is due. An important question for your dentist will be what the color of the post (abutment) will be once the case is completed. 

From the photos, it appears to  me that the implant had been placed too far facially ( to the gums).  You will need to have a cone beam CT done to verify the position of the implant.  If the implant were placed with insufficient supporting bone and restored with an abutment/crown, it will fail.  Recently, I had to retreat a patient from England who had a similar situation with the implant placed in England, I had to remove the implant, graft bone and place a new implant in a proper position. Good luck.  Dr Le

this is not right, the way that the implant was set is not right, the buccal bone is affected, you should take a CT scan, so you can see how much bone is remaining, and probably another procedure needs to be done. or it can be the position of how the implant was set. see your dentist, and check with him the CT SCAN.this will make you have much better idea.