American Academy of Pediatric Dentistry: http://www.mychildrensteeth.org
American Board of Pediatric Dentistry: http://www.abpd.org
American Dental Association Desktop Site: http://www.mouthhealthy.org
American Dental Association Mobile Site: http://www.mouthhealthy.org/en/?device=Mobile
American Academyof Pediatrics: http://www2.aap.org/oralhealth/SOPDOH.html
Additional room for a permanent lower incisor can be achieved through either the extraction of a primary tooth, or the discing away of portion of the primary tooth. If enough room is provided. the permanent lower incisors usually glide into a straight orientation without further intervention.
Guidance eruption may reduce the need for future orthodontic movement of the permanent lower incisors. Guidance eruption may also reduce the risk of future gingival recession and periodontal concerns of the lower front incisors, however, it will not gain any room for future permanent tooth eruption. Because more crowding may be encountered at about 9 years old, the need for space maintenance or future orthodontic treatment may be warranted.