hi i had all my top teeth done with zirconum crowns i was told these were the best i also have 6 bottom with crowns ,my teeth were in a poor state crooked fractures and loose ,so the dentist recommend this work,i am very happy with the teeth very natural but i still have sensitivity on several also i feel light my mouth doesn’t relax properly as it feels like im putting pressure on 1 at the top when i bite or close my mouth and 1 tooth at the top is so painful ,im ok eating but soon after i feel discomfort all over the teeth this lasts for 15 min after eating .lt as got better all by 1 tooth at the top and this i painful round the gum line but the gum looks healthy could this be a bottom tooth is too high and if as to be lowered and is it normal to have so much sensitivity with this work.