On this patient I noticed decay under two 20 year old crowns on teeth #30 and 31.  Removal of the old crowns revealed tooth #30 with deep decay sub-gingival into the root furcation. This tooth was non-restorable.  I recommended extraction and an implant. For tooth #31, I was able to clean out the decay and do a crown build-up and make her a new crown.

The first x-ray above shows my initial try-in with a gap between the implant crown and implant. The crown would not fully seat, so I re-did the implant crown. The second x-ray, after re-doing the implant crown, shows a perfect fit!!! Both the implant crowns #30 and #31 fit and look beautiful.