Skeletal and Dentoalveolar Outcomes of Hyrax vs Quad-Helix with Petit Facemask in Mixed-Dentition Cleft Lip and Palate Patients: a Randomized Clinical Trial

INTERVENTION: Hyrax Quad Helix CONDITION: ; Oral Health Oral Health PRIMARY OUTCOME: SNA angle (Angle between Sella‐Nasion plane and Point A): Degrees (°) SECONDARY OUTCOME: ANB angle (Difference between SNA and SNB): Degrees (°) Angle of convexity (Angle at intersection of Nasion, Point A, and Pogonion): Degrees (°) AO‐BO (Wits appraisal / Distance between perpendicular lines from Point A and B to occlusal plane): Millimeters (mm) Co‐A (Distance from Condylion to Point A / Effective maxillary length): Millimeters (mm) Co‐Gn (Distance from Condylion to Gnathion / Effective mandibular length): Millimeters (mm) Go‐Me (Distance from Gonion to Menton / Mandibular body length): Millimeters (mm) Gonial angle (Angle formed by mandibular body and posterior border of ramus): Degrees (°) IMPA (Incisor mandibular plane angle / Angle between mandibular plane and lower incisor long axis): Degrees (°) LAFH (Lower anterior facial height / ANS to Menton): Millimeters (mm) LL‐E Plane (Distance from lower lip to Ricketts' Esthetic plane): Millimeters (mm) Mc‐A (Distance from McNamara line to Point A): Millimeters (mm) Mc‐Pog (Distance from McNamara line to Pogonion): Millimeters (mm) PFH (Posterior facial height / Sella to Gonion): Millimeters (mm) SNB angle (Angle between Sella‐Nasion plane and Point B): Degrees (°) SNMP (Angle between Sella‐Nasion plane and Mandibular plane): Degrees (°) SNPP (Angle between Sella‐Nasion plane and Palatal plane): Degrees (°) TFH (Total facial height / Nasion to Menton): Millimeters (mm) UI‐SN (Angle between Sella‐Nasion plane and upper incisor long axis): Degrees (°) UL‐E Plane (Distance from upper lip to Ricketts' Esthetic plane): Millimeters (mm) INCLUSION CRITERIA: Repaired cleft lip and palate (unilateral or bilateral). Mixed dentition stage. Chronological age between 8 and 12 years. Presence of maxillary hypoplasia. Skeletal and dental Class III malocclusion.