Cm. Mills et Kj. Mcculloch, CASE-REPORT - MODIFIED USE OF THE JASPER-JUMPER-APPLIANCE IN A SKELETAL CLASS-II MIXED DENTITION CASE REQUIRING PALATAL EXPANSION, The Angle orthodontist, 67(4), 1997, pp. 277-282
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.