There are two forms of tooth extraction: Surgical and Simple. The type you need will depend on if the tooth has erupted out of the gum tissue or if it is still below the gumline. Teeth which have erupted are removed using the Simple technique. Those that remain below the gumline are removed Surgically.
Regardless of the reason a tooth must be pulled, extractions are only reserved for cases in which no other treatment option will cure the infection or problem.