Will my permanent crown going to be the exact shape of my old tooth?

Not exact -: Replacing a natural tooth with a crown is usually undertaken when the natural tooth structure has been altered by decay or trauma. These changes may also result in slight changes in your bite/&/or tooth alignment. Replacing the natural tooth with a properly fitting crown is the most important result, no duplicating the original tooth structure. It should feel natural when finished.

Crown: A crown is needed when the original structure of the tooth is decay or broken. The dentist and the dental lab try their best to recreate the original shape. Most of the time, the crown is made to match the anatomy of the adjacent teeth in order the create harmony in the occlusal scheme.

Close: The crown should be close but not exactly the same.