Can a crown be put back on a post if the crown fell off and broke?

Last week I had my crown break off the post and my post is still snug not loose one bit ! I do know before my crown broke the cement fell off and I told my dentist and nothing was done! but now im being told a partial needs to be put in as the replacement of the crown! why can't my crown be put back on my post if my post is still a snug fit .i will be 41 on August 8th and thinking about a partial makes me want to cry .Thank you Gina