Unerupted teeth - It’s the stage where the wisdom tooth is already within the jaw. Tissues and bones protect it (partially). The appearance of wisdom teeth is indicated by pain at this time.
Partially erupted teeth - The wisdom tooth does not completely mature at this point. They are in the process of developing.
Impacted teeth - When the jaw area is thin, an impacted wisdom tooth develops. It is unable to accommodate additional teeth. The condition is made worse by obstruction and friction from the adjacent teeth. The wisdom tooth erupts in an angular position in this situation.