Yes and no.
For certain teeth, such as your wisdom teeth, it is unlikely that
you will need to replace them. For other teeth, if they are not
replaced movement will occur, which can lead to other problems.
As adults we
have three molar teeth and we do most (about 80%) of our chewing
from the first molar to the first bicuspid/canine area. About 20%
is done in the second molar area, and very little is done in the
wisdom teeth area. Therefore, we seldom miss or need our wisdom
teeth if they are absent or removed. The second molar does at times
need replacing, depending on each individual's situation.
baby teeth maintain space for the developing permanent teeth. If
baby teeth are lost early, crowding problems may be unnecessarily
created and may require orthodontic treatment to correct. Baby teeth
are generally not replaced with another tooth; however, an appliance
(space maintainer) is often placed until the permanent tooth erupts.