This movie shows how an impacted lower wisdom tooth can cause damage to the tooth anterior to it. It erupts and can resorb the root in its path. The root pulp may then get exposed and the tooth can infect due to the exposed pulp as well as possible oral bacteria that the area can be exposed to. The treatment will then be to remove the wisdom tooth as well as the damaged one. The upper tooth may now also over erupt into the empty space.