Dental operations today can be done fearlessly. Your dentist can block your pain sense though local or general anesthesia. In case you are scared of even the local anesthesia injection, your dentist can sedate you first so you do not mind taking the injection.
Research has shown that when you are scared of something, even dental treatment, automatically your guard goes up, and at the same time, your pain threshold goes down. In simple words if you are anticipating something painful you become hyper sensitive to every stimulus-even sound. If that happens to you the dentist has very effective means of making you comfortable. He will give a sedative that will calm you down, and will remain composed during the most complicated procedures.