According to most (possibly all) Dentists in the US it is recommended to remove the wisdom tooth on both ends and their counter parts on the top row. That is a total of 4 teeth! The claim is that they are not used in the chewing process. I have never heard this from Dentists in India.
In general, the attitude of Dentists in India is to try and save every tooth as far as possible. Dentists in the US on the other hand love to do an extraction at the slightest excuse. Someone told me the supposed rational for this approach. If you remove a tooth then they are free of law suits. If you try some fancy exercise on the tooth and something goes wrong, Dentists are likely to get sued! Also, given the crazy health insurance racket in the US, I believe an extraction is easy money. I am curious to know the experiences of anyone around here on this.