Wisdom teeth usually don’t “erupt” through the gums until we’re teenagers or in our twenties. They are usually the last teeth to come into our mouth. The majority of us have four wisdom teeth. Quite often, there is little space at the rear of the jaw for wisdom teeth to come easily through the gums. If the jaw does not have enough room for the wisdom tooth to come through, the tooth will become wedged or impacted.
Some impacted wisdom teeth remain buried and cause no trouble. However, other impacted wisdom teeth may cause severe problems. Partially erupted wisdom teeth are very difficult to clean and brush. When food and bacteria build up between the wisdom teeth and adjacent molars, this eventually leads to tooth decay and gum infection.