 The purpose of this study was to examine the positioning of mini-screws used for maxillary expansion in late adolescence. The study found that mini-screws did not remain in the same position throughout the course of treatment, but rather moved along the suture line. This movement was correlated with the thickness of the surrounding bone, particularly in the anterior region of the maxilla. This article was authored by Marco Miglierotti, Anna de Marie, Fabio Anarama, and others.