Dental crown too short?

Hi, I had a dental crown done on my back tooth about a month and a half ago. After having the temp put on it felt fine, but since the permanent one has been cemented on it is bothering me more and more. It's sore and just feels very sensitive, especially if I chew on it. Is this normal after all this time? What can go wrong? I'm thinking now I should have just left the tooth alone and am scared. The dentist just seems puzzled as to why it would hurt and says to wait it out. Also I must add that the crown doesn't cover the entire tooth, but it comes approx. halfway down the tooth like a cap instead of covering. Is this normal????? (sorry for long question)

Any treatment to teeth entails some risk. We are drilling "live" teeth under the cover of local anaesthetic so it is not unusual to have some post-op pain afterwards. If it is not too much drilling, then all will be fine. Deep fillings or broad fillings (like a crown) do more damage, and the risks of post-op pain or nerve death increase.
When the temp crown is placed, it is often cemented with a sedative temp cement. But when the final crwon is cemented, a permanent cement must be used, and depending upon the type used, it can be quite acidic. So there will be increased sensitivity for a while. Thankfully, most will settle down given a bit of time, but some will not and an RCT may be indicated.
A crown usually covers the tooth entirely down to the gum, but you can have smaller versions called 3/4 crowns or even onlays. Crown lenthening as mentioned above is only required if your tooth is too short for a standard crown.
Talk to your dentist again, or get a second opinion.

This same thing happened to me.It turned out that I needed a root filling too! Ironically,it was the trauma to the tooth caused by the crown procedure that caused this to happen.I wasn't happy! Fixing it wasn't so bad though.The Dentist managed to drill through the crown without removing it.It didn't hurt anywhere near as bad as I was expecting.Go back and get an Xray.This is the only way to know for sure if this is your problem.

Did your dentist perform a core build-up on your tooth before making the crown? This is the process of grinding your tooth down to a "nub", then taking an impression for the temporary and permanent crowns.

Typically, most crowns cover the whole tooth. You may have sensitivity for a variety of reasons. You can suggest to your dentist that he/she try some sort of desensitizing material under your crown, like Gluma, or something similar.

Good luck.

ok... if it is a gold crown, that is all normal... the sensitivity will go away, the size.. it called 3/4th crown.
If the crown is tooth colored.. hmmmmm i donno

Sounds like something cracked while they were fixing it and also sounds like you need a clinic crown lenthen-hard tiss (costs around $1100)(I know this because I am going through it right now and am looking at the treatment plan my dentist gave me-- yes, it is super expensive)