Skeletal and dental effects of rapid maxillary expansion assessed through three-dimensional imaging: A multicenter study

Joshua Luebbert, Ahmed Ghoneima, Manuel O. Lagravère

Research output: Contribution to journalArticle


Objectives: The aim of this study was to determine the skeletal and dental changes in rapid maxillary expansion treatments in two different populations assessed through cone-beam computer tomography (CBCT). Materials and methods: Twenty-one patients from Edmonton, Canada and 16 patients from Cairo, Egypt with maxillary transverse deficiency (11-17years old) were treated with a tooth-borne maxillary expander (Hyrax). CBCTs were obtained from each patient at two time points (initial T 1 and at removal of appliance at 3-6months T 2). CBCTs were analyzed using AVIZO software and landmarks were placed on skeletal and dental anatomical structures on the cranial base, maxilla and mandible. Descriptive statistics, intraclass correlation coefficients and one-way ANOVA analysis were used to determine if there were skeletal and dental changes and if these changes were statistically different between both populations. Results: Descriptive statistics show that dental changes were larger than skeletal changes for both populations. Skeletal and dental changes between populations were not statistically different (P . 0.05). Conclusion: Rapid maxillary expansion treatments in different populations demonstrate similar skeletal and dental changes. These changes are greater on the dental structures compared to the skeletal ones in a 4:1 ratio.

Original languageEnglish (US)
JournalInternational Orthodontics
StateAccepted/In press - 2016
Externally publishedYes



  • Cone-beam computer tomography
  • Rapid maxillary expansion

ASJC Scopus subject areas

  • Orthodontics

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