Because this tooth usually erupts when the person is about 16 - 21 years of age, it is called the wisdom tooth. In reality, the tooth is often non-functional or even problematic.
When there is insufficient space in the jaw for the tooth to emerge fully, the wisdom tooth may get trapped under the gum and bone. Partial eruption makes the tooth susceptible to gum infection which may result in recurrent bouts of pain and swelling. Left alone for long periods, chronic gum infection can lead to fibrous growths or cyst formation.
In certain cases, the tooth may be slanted against the next tooth - the second molar. The resulting gap between the two teeth traps food and promotes bad breath as well as decay.
This OPG X-ray depicting four impacted wisdom teeth, you can see two wisdom teeth in the upper jaw and two wisdom teeth in the lower jaw. In this case for the upper no need required surgery but for the lower one required surgery anywhere if you are Singaporean or Singaporean PR the total of this surgery you can use your medisave for both of this surgery. (Full amount, No need cash, No need deposit required )