Impaction means the tooth has become trapped in the jawbone and can’t fully emerge. There are several types of impactions, and all of them can lead to dental health problems.nnSoft tissue impaction is when a wisdom tooth erupts but is partially covered by the gums, preventing you from cleaning the tooth properly.nA partial impaction may start to come in, then get stuck or blocked. The tooth never fully emerges, leading to cleaning problems and a non-functional tooth.nComplete impaction means there is no space for your wisdom tooth. It stays in the jawline and has to be surgically removed. This extraction can present difficulties as you get older because nerves and tissue become entwined around the tooth.