BACKGROUND:The facemask is used to treat early class III malocclusion, in combination with expansion therapy. There is a great deal of controversy in literature regarding the effectiveness of protraction facemask treatment as studies report results anywhere from considerable changes to lack of any maxillary improvement. This controversy may be due to the fact that the process of placing the orthopaedic facemask on patients has, in part, been done empirically, without the use of literature containing the clinical parameters for facemask placement for maxillary protraction.