[Orthopedic expansion of the maxilla].

This paper evaluates maxillary expansion by synthesizing the scientific literature, focusing its role in treatment of maxillary insufficiency, buccal cross bites, and deviations in mandibular closure as well as its effectiveness in correcting a lack of harmony between tooth and jaw size. By its creation of maxillary bone "capital" it facilitates treatment of arch length discrepancies in an environment of periodontal health. And by restoring the maxilla to normal size it improves the orthopedic effectiveness of Class II treatment of mandibular advancement appliances. In a similar fashion rapid palatal expansion, by relaxing circum-maxillary sutures, prepares the way for maxillary advancement in Class III cases with masks of Delaire or Petit. And, by broadening the floor of the nose, palate splitting improves nasal airflow and helps mouth breathers learn how to breathe through their noses. Most authors emphasize the benefits of early intervention through truly orthopedic movement that eliminates tipping of posterior teeth and reduces the risk of buccal fenestration.