• About
  • Editorial Board
  • Current Issue
  • Early access
  • Archive
Search
EJPD
  • About
  • Editorial Board
  • Current Issue
  • Early access
  • Archive
  • Sioi
  • Guidelines for Authors
  • Article submission
  • Terms of use
  • Privacy
Home Buccal Alveolar Bone changes and upper first molar displacement after maxillary expansion...

Buccal Alveolar Bone changes and upper first molar displacement after maxillary expansion with RME, Ni-Ti leaf springs expander and Tooth- Bone-borne Expander. A CBCT based analysis

Authors:

  • M. Maschio
    Department of Biomedical Surgical and Dental Sciences, University of Milan, Milan, Italy - Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
  • F. Gaffuri
    Department of Biomedical Surgical and Dental Sciences, University of Milan, Milan, Italy - Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
  • A. Ugolini
    Department of Sciences Integrated Surgical and Diagnostic, University of Genova, Genova, Italy
  • V. Lanteri
    Department of Biomedical Surgical and Dental Sciences, University of Milan, Milan, Italy - Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
  • A. Abate
    Department of Biomedical Surgical and Dental Sciences, University of Milan, Milan, Italy - Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
  • A. Caprioglio
    Department of Biomedical Surgical and Dental Sciences, University of Milan, Milan, Italy - Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy

DOI:

https://doi.org/10.23804/ejpd.2023.1896

ABSTRACT


Aim

To evaluate the buccal alveolar bone changes and the upper first molar displacement in subjects treated with conventional rapid maxillary expansion (RME), Ni-Ti leaf springs expander (Leaf Expander) and Tooth-Bone-borne Expander (Hybrid Expander) using CBCT scans.

Methods

The sample consisted of 52 children treated with RME (n=18), Leaf Expander (n= 17) and Hybrid Expander (n= 17). CBCTs were taken before and after maxillary expansion and the Horos software was used for the analysis. Descriptive statistics and paired t-test were used to assess changes between the pre-treatment and post-treatment measurements. ANOVA test and Tukey’s post hoc test with Bonferroni correction was used for between groups comparison.

Results

The alveolar bone thickness at CEJ 3,5 and 10 decreased after expansion for all the three groups instead alveolar bone height had not significant variations. The ANOVA test showed a significant lower decrease of CJ3 and a greater amount of molar displacement concerning the DR variable in the Hybrid expander group. A significant buccal displacement of the first molars with increasing of DC and DR and decreasing of AI after the three expansion protocols was found.

Conclusion

The Hybrid Expander during preadolescence showed few advantages over the use of tooth-anchored expanders. An expansion approach with mini-screws is not preferable during early mixed dentition to a conventional approach. The differences in dental tipping values were clinically insignificant and the reduction in cortical bone thickness remained less than 1 mm. When possible, the use of second primary molars as anchorage should be preferred.

PLUMX METRICS

Download PDF

Publication date:

September /2023

Keywords:

Bone borne maxillary expander, Leaf expander, Maxillary hypoplasia, cbct, malocclusion, rme

Issue:

Vol.24 – n.3/2023

Page:

211 – 215

Publisher:

Ariesdue

Topic:

Developing dentition and occlusion in paediatric dentistry

Cite:


Harvard: M. Maschio, F. Gaffuri, A. Ugolini, V. Lanteri, A. Abate, A. Caprioglio (2023) "Buccal Alveolar Bone changes and upper first molar displacement after maxillary expansion with RME, Ni-Ti leaf springs expander and Tooth- Bone-borne Expander. A CBCT based analysis", European Journal of Paediatric Dentistry, 24(3), pp211-215. doi: 10.23804/ejpd.2023.1896
Vancouver: M. Maschio, F. Gaffuri, A. Ugolini, V. Lanteri, A. Abate, A. Caprioglio. Buccal Alveolar Bone changes and upper first molar displacement after maxillary expansion with RME, Ni-Ti leaf springs expander and Tooth- Bone-borne Expander. A CBCT based analysis. European Journal of Paediatric Dentistry [Internet]. 2023Sep.31 [cited 2025May.13];24(3):211-215. Available from: https://www.ejpd.eu/abstract-pubmed/buccal-alveolar-bone-changes-and-upper-first-molar-displacement-after-maxillary-expansion-with-rme-ni-ti-leaf-springs-expander-and-tooth-bone-borne-expander-a-cbct-based-analysis/
MLA: M. Maschio, F. Gaffuri, A. Ugolini, V. Lanteri, A. Abate, A. Caprioglio Buccal Alveolar Bone changes and upper first molar displacement after maxillary expansion with RME, Ni-Ti leaf springs expander and Tooth- Bone-borne Expander. A CBCT based analysis. European Journal of Paediatric Dentistry. 2023;24(3):211-215

Copyright (c) 2021 Ariesdue

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Facebook
Twitter
Pinterest
Linkedin
WhatsApp
Email
Print
    Cristina Calchera
    Editor in chief: dott. Luigi Paglia
    European Journal of Paediatric Dentistry © | ISSN (Online): 2035-648X
    powered by Ariesdue

    CONTACT US
    • About
    • Editorial Board
    • Current Issue
    • Early access
    • Archive
    European Journal of Paediatric Dentistry © | ISSN (Online): 2035-648X
    Registrazione del Tribunale di Milano n. 285 del 14.04.1998 | ROC 1946 - 26.09.2001
    /* ----------------------------------------- */ /* Modello di contenuto: Abstracts PubMed - inizio */ /* ----------------------------------------- */ /* ----------------------------------------- */ /* Modello di contenuto: Abstracts PubMed - fine */ /* ----------------------------------------- */