<s>[INST] A few weeks ago I got a new crown. Last molar in bottom back left side. I cannot afford to loose the tooth. He used the new technology. Two hours and all done. But it sits too low. He has tried to adjust my bite by taking a little off my front bottom teeth but it still is too low. Can the crown be built up with porcelain while in my mouth. I am afraid of taking it off and redoing it because the tooth has a crack in it. [/INST] Hi Dear, Welcome to Chat Doctor Team. Understanding your concern. New crown of last molar tooth as you said is lower in position which means this crown is not at all in occurs contact with teeth of opposite jaw. If teeth are not in proper causal contact while chewing it will cause load to distribute unevenly which in turn cause pressure on muscles and temporomandibular joints, and it will cause wasting of muscles. Your tooth can be saved easily that is not an issue but what your need is removal of existing crown and resetting it to higher level. A well-fitted crown will allow you to bite proper once it is properly inserted. Resin cements along with bonding agents are used nowadays for crown lengthening. Subgingival i.e. below your gum line margin placement can be done to improve height of your crown. Alternation of tooth preparation design with placement of retention forms can be done. I would suggest you to stick to your exiting dentist and tell him your problem because if you will switch to another dentist that could be very costly for you and new dentist can cause same mistake again. Hope your concern has been resolved. Best Wishes, </s>