Depending on the dent, you may be able to pull it out with some duct tape. Place a piece in the dent and gently pull the tape out and off of the dent. Be gentle!
"Tone is in the instruments. Technique in the hands. Do what you will." ~quote from some guy at the TGP forum
"Without a doubt, the quality of your instrument will effect your tone, and any pickups, effects, amps, and microphones used along the way will also have an impact on the sound waves."~Cameron Mizell