Related Experiment Video
Updated: Jul 24, 2026
Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
Condylar volume comparison after rapid maxillary expansion by Haas and Hyrax in growing patients: A retrospective
W Dias Mendes1, P C da Silva Mira1, C L Bitencourt Reis1
1Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP)-Ribeirão Preto, São Paulo, Brazil.
Purpose:
This study aimed to evaluate the condylar volume of growing patients after rapid maxillary expansion (RME) by Haas and Hyrax appliances.
Methods:
This retrospective cross- sectional study assessed the records of patients diagnosed with transversal maxillary deficiency and with incomplete maturation of midpalatal suture. RME was performed with Haas or Hyrax appliances. Condylar volume was obtained by segmentation of DICOM images from cone-beam computerized tomographys before (T1) and after one year (T2) of RME. The results were compared between the experimental times, sex, and appliances by parametric tests (alpha=5%).
Results:
Twenty-seven patients were included (128±21 months old). There were no statistical differences in condylar volume between experimental times (T1 and T2), sex, and appliances to the right and left condyle (P>0.05).
Conclusion:
RME by Haas or Hyrax does not impact the condylar volume of growing patients.
