What complications are associated with treating a knocked out tooth?

The most serious complications that can occur if you undergo treatment for a knocked out tooth are infection and inflammation. In some cases, the root where the tooth is reimplanted may become infected with bacteria, leading to inflammation. The presence of inflammation can damage tissue and lead to loss of the tooth. The threat of this complication is reduced if a knocked out tooth is kept healthy prior to being reimplanted by a dentist. If you have a tooth knocked out, try to put it back in place, then go straight to a dentist. If you can't put the tooth back in place, carry it to the dentist in a cup of milk or in your mouth, tucked under the tongue or between your cheek and gum.