If they are impacted and infected or cause crowding in your teeth, it is recommended that they be removed to avoid damaging the surrounding teeth. If they grow into the normal position and function properly, it is not necessary to have them removed.
A wisdom tooth is considered impacted if there is not enough room after the second molar for the tooth to emerge or develop normally.
Wisdom teeth, if it is not erupted properly, can cause further dental problems, including damage to surrounding teeth, jaw damage, infected gum tissues, cavities, alignment problems and sinus issues.
Being the last tooth to erupt in the mouth, very often there is not enough space and these teeth either do not erupt completely or erupt partially in the mouth. Moreover, these teeth have curved roots and it may be close to the nerve of the lower jaw. This makes it much more difficult to remove as compared to a normally erupted tooth.
The cost of the treatment depends on the complexity of the case.