Abstract
Effects of Mandibular Protraction Appliance and Jasper Jumper in Class II Malocclusion Treatment
Highlights
AND STATEMENT OF THE PROBLEMThe current tendency for nonextraction treatment of Class II malocclusion is the use of appliances that do not need patient compliance, including fixed functional orthopedic appliances [1, 2]
The null hypothesis tested was: There are no differences between the effects of the Mandibular Protraction Appliance (MPA) and Jasper Jumper (JJ) appliances in the Class II treatment
The MPA is an intraoral fixed functional appliance developed by Coelho Filho [5] in 1995, that induces continuous mandibular protrusion to correct Class II malocclusions
Summary
AND STATEMENT OF THE PROBLEMThe current tendency for nonextraction treatment of Class II malocclusion is the use of appliances that do not need patient compliance, including fixed functional orthopedic appliances [1, 2]. The Jasper Jumper appliance, more recently developed, had similar effects to the Herbst appliance, at a lower cost [1]. Some studies have demonstrated the efficacy of this appliance in correcting Class II malocclusion [5 - 10]. The Mandibular Protraction Appliance (MPA) and Jasper Jumper (JJ) are indicated for skeletal Class II malocclusion, mainly due to mandibular retrusion, and their main difference is rigidity. The effects of the MPA have not been compared with other fixed functional appliance, especially the JJ, to demonstrate the different effects in the correction of Class II malocclusions. The objective of this study was to cephalometrically compare the dentoskeletal and soft-tissue changes after treatment of Class II malocclusions with MPA and JJ, associated with fixed appliances. The null hypothesis tested was: There are no differences between the effects of the MPA and JJ appliances in the Class II treatment
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