Mordida cruzada posterior

Abstract

The posterior cross bite is a term that indicates abnormal lip-lingual relation of antagonist teeth, not only in the intercuspal position, but also during the movements of the mandibular dynamics, presenting multifactorial etiology, such as oral suction habits, mouth breathing, atypical swallowing, early extractions, among other factors. This malocclusion should be promptly treated with the goal that all face structures are in harmony or symmetrical for their development, reducing the complexity of a possible future treatment. The preferred treatment of cross bite is maxillary expansion, which can be done through rapid maxillary expansion appliances, as Haas or Hyrax, or slow expansion appliances, such as Quad-helix.