Upper incisor before dental crown surgery. Close-up of the upper incisors of a patient being prepared for dental crown surgery on the second upper incisor at left. Here, only the root of that upper incisor is left. A dental post will be implanted into the incisor root, and then a dental crown will be fixed to that to restore the function of the tooth. There is also decay (black area) in the canine at centre left. For the incisor with the dental post after implantation, see image C029/9597. For the dental crown in place, see image C029/9598.