There are numerous possibilities that may lead to the need for tooth extraction. Usually, the reasoning behind undergoing the process include if your tooth is too badly damaged to repair with a crown or other procedure, if you suffer from widespread gum disease, which can result in loose teeth or if your mouth is too crowded with milk teeth inhibiting the protrusion of adult teeth, which may lead to overcrowding and crookedness.
Another factor that can subsequently lead to teeth needing to be removed can be to accommodate dental braces. This can be because space needs to be made to allow for tooth movement to straighten the teeth when the brace is applied.