CASE-REPORT - MODIFIED USE OF THE JASPER-JUMPER-APPLIANCE IN A SKELETAL CLASS-II MIXED DENTITION CASE REQUIRING PALATAL EXPANSION

The Jasper Jumper appliance provides a method of Class II correction w ith an active force component that the patient cannot remove. A modifi cation of classic Jasper Jumper usage is illustrated in a mixed dentit ion case where full banding is impractical. This report shows how Jasp er Jumper springs can be attached to a fixed maxillary expansion appli ance and a lower lingual holding arch for correction of a Class II mal occlusion. Cephalometric analysis revealed that despite seemingly adeq uate anchorage for the springs, treatment changes were largely dentoal veolar, with minimal improvement in the underlying skeletal structures . Some restraint of maxillary growth was found, but most of the overje t correction was due to forward movement of the mandibular dentoalveol ar complex and retraction of the maxillary dentoalveolar complex.