Comparison Between Protraction Facemask and Upper Braces for Underbite Correction in Growing Children

Patients assigned to intervention 1 will utilize the Petit protraction facemask, in conjunction with a rapid maxillary expansion (RME). This facemask consists of a forehead pad and chin pad linked by a sturdy steel support rod.

Upper partial fixed appliance / 2 by 4 appliance will be used in this study by using bracket set (119-142 Unitek™ Gemini Bracket MBT™ U/L 5x5 0T-Cuspid 3Hk) with molar bands (3M™ Victory Series™ First Molar Bands) or buccal tubes (3M™ Victory Series™ Superior Fit Buccal Tubes) and upper nickel titanium archwires (3M™ Unitek™ Nitinol Heat-activated Archwire) and upper stainless steel archwires (3M™ Unitek™ Permachrome Standard Archwire) .