A person's wisdom teeth need to be removed only if they
are causing complications with the rest of a person's already existing teeth, or if
there is pain. The most common two problems are either that a person's wisdom teeth
start growing in sideways, or they do not breech the gum line. If the teeth start
growing in sideways it can damage existing
teeth.
Essentially what most dentists believe happened is
that as the human skull evolved, and the jaw shrunk in size the wisdom teeth that used
to fit in our mouths no longer had room to grow in causing complications. Our anatomy
did not keep up with our evolution. Over time the human body continues to evolve, and
given enough time there will be more people without wisdom teeth than there are with
them. Even in the present day there exist people who have no wisdom teeth to
remove.
These days it is common for most people to have
their wisdom teeth removed once they reach about 18 years of age to avoid the
possibility of complications later in life. Even if there is room in the jaw for the
wisdom teeth to grow in, it is common for these teeth to develop infections because they
are so close to the jawline that food gets stuck there, and is difficult to remove even
with flossing (some fingers just aren't long enough!)
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