Hello, I had a zirconia crown placed a few days ago, but when my dentist was working on my bite he filed it too low and a piece came off...there is also a hole in the top. Another is being ordered, but wondering if I should get the porcelain crown instead. I cannot stand the smooth, slippery feeling of the zirconia. Driving me nuts. Will it lessen? It also looks shinier than my porcelain crowns. Should I switch to porcelain?