an xray does not penetrate a crown so something could be wrong. heat sensitivity indicates possible infection.
Yes i went to see my dentist twice and had xrayed twice and was told nothing is wrong with the tooth. I was told that if keeps bothering for 2 or more weeks then he might remove the crown and check the tooth. The tooh is sensitive with cold and hot and pressure pain when eating hard food. The pain goes all the way to the gums but its a pressure pain. It feel like someone is pressing the tooth forcefully. I also have a bad headache after eating. my jaws hurts. I have a bad tmj.
If the crowned third molar can occlude with opposing tooth, the crowned tooth may get secondary caries due to cement washout. Seeing a dentist to evaluate the offending tooth is advised.