The dentist thought the crown was real

Mary Weiss writes in a comment:

Dr. Kris; I just wanted you to know that when I moved to Sedona and went to a new dentist, he cataloged all the crowns in my mouth. When I saw the list, I had to add one they had not detected — my front incisor, that fractured and you crowned so many years ago! They thought it was real!!! Having read your notes on porcelain, I can’t help but wonder if you were using some of the newer techniques on me. I am certain, however, that my crown is an almost perfect copy of my original tooth. Thank you, and I miss you!