Sensitive tooth after crown

In  December of 2009, I went for a cleaning  and the dentist suggested getting a crown on a tooth with a large filling. He stated that there was no need for a Root Canal. After the procedure, I continued having pain and ended up having to have a root canal. One month later, I was back in the office with severe pain. After many visits with no resolution. My jaw swelled up and I had to have the tooth removed. This required me to get a bridge. The tooth for the back part of the bridge had a crown on it with a previous root canal from about 10 years ago. I had never had any problems with this tooth. Once the bridge was placed, I had severe sensitivity and pain from the back tooth. I've gone to the dentist several times and he always makes some excuse as to why it is hurting. Once, there was cement in the gum line. Second, the nerves need to die around the tooth.  I mentioned that I thought the bridge was too short around the tooth and he said it wasn't. Now, I'm still in pain and don't trust his judgment. I can't imagine why I'm still having pain from a bridge that was placed over 6 months ago.  This tooth has never hurt in the past and now I'm worried that I may lose it too if somethings not done. Should I require them to take the crown off? What are my options?  Thanks for your help in advance.

[Jerome Tsang, DDS]

You may need to seek a second opinion from another dentist.  I'm not sure why the second tooth is hurting.  If there was a root canal on it, there should be no nerves inside the tooth.  The pain is most likely coming from the gums or the jaw bone around the tooth.  

[packet04]

You might want to check out other dentists if you think your problem isn't solved by your current dentist. You got to have second opinion. Most people do this to confirm and to be sure that they are diagnosed correctly.