Sometimes teeth do not erupt into the mouth as they should. This can be caused by growth patterns of the jaws, or by retained primary teeth. If the tooth doesn’t erupt on its own, it usually requires orthodontic therapy to move it into normal position. Before orthodontic therapy can begin, the tooth must be unexposed from underneath the gum tissue. Once the tooth is uncovered, orthodontic appliances can be attached and activated. If a retained primary tooth is present, it usually needs to be extracted at the time of uncovery.