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Treatment effects of Reverse Twin‐Block and Reverse Pull Face Mask on craniofacial morphology in early and late mixed dentition children
Author(s) -
Fareen N.,
Alam M. K.,
Khamis M. F.,
Mokhtar N.
Publication year - 2017
Publication title -
orthodontics and craniofacial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 55
eISSN - 1601-6343
pISSN - 1601-6335
DOI - 10.1111/ocr.12179
Subject(s) - craniofacial , dentistry , orthodontics , medicine , cephalometry , malocclusion , psychiatry
Structured Abstract Objective Reverse Twin‐Block ( RTB ) and Reverse Pull Face Mask ( RPFM ) appliances are used to correct Class III malocclusion in growing patients. Aim of this retrospective study was to compare and analyse craniofacial changes produced by RTB and RPFM in the early and late mixed dentition in Malay children with Class III malocclusion. Methods Data consisted of pre‐ and post‐treatment lateral cephalograms of 95 children, 49 patients with RTB and 46 patients with RPFM , divided into an early (8‐9 year) and late (10‐11 year) group. Treatment changes were assessed by the Ricketts analysis using CASSOS software, where 71 anatomic landmarks were identified in each cephalogram. Paired and independent t tests were performed for statistical comparison. Results Paired t test revealed significant changes in facial axis, facial angle, MD plane to FH , lower facial height, mandibular arc, maxillary convexity, U1 to AP og, L1 to AP og, L1 to AP og angle and upper lip to E‐plane measurements in RPFM , whereas significant changes were found in facial taper, U1 to AP og and lower lip to E‐plane values with RTB in the early treatment group. Independent t test revealed significant changes in U1 to AP og, L1 to AP og and U6 to PtV values in the RTB group. Post‐treatment comparison of RTB and RPFM showed significant differences in L1 to AP og and L1 to AP og angle values. Conclusions RPFM revealed more favourable craniofacial changes than RTB , particularly in the late mixed dentition stage.