People's teeth are not simply consistent inside and outside. The crown (visible part) of human teeth has several structures from the outside to the inside: enamel, dentin and pulp. Your fangs may have been ground into dentin. There are many dentinal tubules communicating with the pulp, and there are nerves and blood vessels in the pulp. Now that your teeth have been ground to dentin, you should have pain symptoms. Now you may not have it, because your dental pulp has produced restorative dentin during your slow wear, which protects your dental pulp. If you grind your teeth now, you will definitely grind away more dentin, which will expose the pulp, so you will have a great chance of getting pulpitis, so I suggest you never think about it again. And you have to give up this habit of grinding your teeth, which is very bad for your teeth.