Is a soft tissue graft possible over an implant/crown? (Photo)

Survival of grafts depends on blood supply.  Since no bone is above an implant, adding height to the tissue is difficult.  We can often thicken the tissues, but not make them taller.  Might be worth a try, so ask a periodontist.

gum graft procedure around implants might not be successful in every case. the success will depend on the level of bone covering around the implant your implant seems to be placed forward and higher up compared to adjacent tooth. This is why the crown is longer. Also you can see a greyish colour shadowing around the crown. your implant was placed this way maybe because the bone available was still deficient in both vertical and horizontal dimensions. Gum graft will only help improve the grey shadowing around the implant. The crown length can not be modified. the only way that you could get the symmetry close to what you are looking for is to remove the implant. Graft the site and then place another implant.   This bone grafting technique is doable but won't be easy. Might need multiple steps of bone and tissue grafting. see your dentist. There might be other options to improve you the aesthetics by combination of modifying the contours of the crown and gum graft..... 

It is difficult to add tissue height in your case.  I would redo the crown with pink porcelain added around the tissue margin to achieve the symmetry you are looking for.

Hi there. That's a great question and yours is a very common scenario. Unfortunately, there is no way to graft the implant to achieve symmetry with the tooth in the other side. Also, implant removal and bone grafting won't achieve your desired results because the bone cannot be grown in a downward direction in this case. The reason for this has to do with unavailability of blood supply to keep the bone lower. This in turn cannot support gum growth in a lower direction to cover the tooth and give you that symmetry. The he planning could have been done at the time preceding the surgery, but I am sorry to report that at this time there isn't much more that can be done. 

It is possible to do a gum graft over an implant area.  However the main goal of this type of procedure is to thicken the gum over the implant, not to cover the long crown.  In this case there may be issues that can't be resolved with a gum graft.  The implant looks like it was placed deep, likely due to bone volume issues, this may prove to be biologically difficult to remedy.  Go back to your doctor to discuss the options, every case is different and without all the detailed information difficult to give you the best advise.  Good luck!