article_metadata: Syed Mohammed Yaseen Ravindranath Acharya
article_metadata: 10.1155/2012/860385
article_metadata: Case Rep Dent
article_metadata: 2012;2012:860385.
article_metadata: CC BY
article_metadata: https://pubmed.ncbi.nlm.nih.gov/23119188/
article_metadata: PMC3479939
article_metadata: 23119188
article_metadata: Hexa helix: modified quad helix appliance to correct anterior and posterior crossbites in mixed dentition
article_metadata: 2012