Surgically assisted maxillary expansion in adults: prospective study
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Updated: Jul 4, 2026

Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
R R de Freitas1, A J Gonçalves, N J Moniz
1Unit of Oral and Maxillofacial Surgery, Irmandade da Santa Casa de Misericórdia de São Paulo-Faculty of Medical Sciences, São Paulo, Brazil. rrdefreitas@terra.com.br
Abstract:
The purpose of this research was to carry out a prospective clinical study of patients with transverse maxillary deficiency, orthopaedically expanded after minimum osteotomies of the zygomatic pillars and the median palatine suture, with quantitative assessment of the stability of the transverse dimensions of the maxilla. The distance between the superior canines and the first superior molars was measured six times during the clinical experiment. The desired expansion was achieved by 15 days postoperatively for all patients. After one year of follow-up, clinical measurements showed a relapse rate of 23% in the superior canine area and 18% in the superior first molar area.

