Many people are nervous about going to the dentist, and they all usually fear the same thing: pain.

Long ago, this fear probably made sense. Anesthesia consisted of being hit on the head or choked until unconsciousness set in. Later, less violent methods included opium, belladonna and alcohol, but treatment had to be done quickly before the effects wore off.

These days, no one should expect to endure pain at the dentist office. The number of sedatives and types of anesthesia now available provide more ways to experience pain-free dental treatment than ever before. Even the sting of the numbing needle can now be avoided, thanks to topical gels and computer-guided injection methods. And newer methods, such as electronic anesthesia — electrical impulses delivered through electrodes help block pain — allow you to escape needles completely. Many dentists now offer other ways in addition to anesthetics to help you relax. You may be able to listen to your choice of music through headphones or watch a movie on a personal theater system.

No matter what type of pain control you receive, always tell your dentist if you don't think it's working as well as it should, or if you feel it starting to wear off. The effect of an anesthetic can vary widely from one person to the next, and your dentist can't always recognize when you are feeling discomfort. So be sure to let him or her know if the anesthetic doesn't seem to be doing its job.

Usually your dentist will test the numbed area to make sure the anesthetic is working before beginning any treatment. You can also ask to arrange a signal (such as a raised finger or hand) to alert your dentist if you are feeling any pain or discomfort.