Jamilian A, Showkatbakhsh R, Kamali Z .R-Appliance: A different design in functional therapy in Cl II Div I malocclusion. International journal of orthodontics 2009; 20(2): 11-15
Abstract
The aim of this study was to compare the effects of a differently designed functional appliance (R-appliance) with control group in Class II Division I (Cl II Div I) cases.
METHODS:
18 girls treated with R-Appliance were selected as the experimental group. The control group consisted of 20 untreated girls. All of the patients had Cl II Div I malocclusion due to mandibular deficiency. Lateral cephalograms were analyzed at the beginning (T’1, T’2) and end of the study (T’1, T2).
RESULTS AND CONCLUSIONS:
Increase of IMPA and reduction of SNA are two prevalent side effects of most functional appliances; however, results of this study showed SNA and IMPA had no significant changes in experimental group in comparison with the control group.