The aim of this review was to identify the appropriate treatment for the correction of anterior crossbite.

The authors searched in Scopus, Medline, Cochrane Library, Embase and Psychinfo databases for studies involving Children in the primary or mixed dentition with an anterior crossbite affecting one or more incisors, and no underlying skeletal class III discrepancy.  Reference lists of identified articles were also checked for relevant studies and possible inclusion.  Articles were checked for inclusion independently, and in duplicate by two investigators, with data extraction also being conducted independently by the two investigators.

The data were arranged by type of study and further subdivided by treatment type.  The main outcome considered was time taken to correct the crossbite and treatment duration. 46 articles were included.  However as a result of the low levels of evidence found, no statistical methods were employed.

They concluded:-

This review has highlighted the lack of high quality evidence for the management of anterior crossbites in children. Although the level of evidence is  low, there is similarity in the length of time it took to successfully treat anterior crossbites using similar treatment modalities. High level studies are required before definitive conclusions can be made.

Borrie F, Bearn D. Early correction of anterior crossbites: a systematic review. J Orthod. 2011 Sep;38(3):175-84. PubMed PMID: 21875991.