Related Experiment Video
Updated: Aug 13, 2026
Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
Initial results regarding force exertion during rapid maxillary expansion in children
Christian Sander1, Stefan Hüffmeier, Franz Martin Sander
1University of Ulm, Department of Orthodontics, Oberer Eselsberg, 89081 Ulm, Germany. Dr.Sander@imail.de
Aim And Method:
We developed a method to measure the forces occurring during rapid maxillary expansion and carried out the University of Ulm rapid maxillary expansion method, similar to that of Chatellier and Chateau, in ten patients.
Results:
The forces occurring on the maxilla increased up to 120 N. There was considerable variation in force level from patient to patient. After "rupture" of the midpalatal suture, the forces decreased. The remaining forces seemed to be the result from stress on soft tissue and bone.
