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Korean J Orthod
Copyright © The Korean Association of Orthodontists.
Ney Paredes1,2, Ausama Gargoum2, Ramon Dominguez-Mompell3, Ozge Colak4, Joseph Bui2, Tam Duong2, Maya Giannetti5, Fernanda Silva2, Kendra Brooks2, Won Moon6,7
1 Private Practice, Innova Orthodontics, Houston, TX.
2 UCLA School of Dentistry, Section of Orthodontics, Center for Health Science, Room 63-082 CHS, 10833 Le Conte Ave, Box 951668, Los Angeles, CA 90095-1668.
3 Orthodontics Department, Rey Juan Carlos University, Madrid, Spain.
4 Orthodontics Department, State University of New York, at Buffalo, NY.
5 UCSF School of Dentistry, Section of Orthodontics
6 Adjunt Professor at Orthodontic and Craniofacial Development Research, Forsyth Institute, 245 First Street, Cambridge, MA 02142.
7 Professor at AJOU University, School of Medicine, Orthodontic Department, South Korea
Correspondence to:Won Moon and Ney Paredes
1550 Burnett St, Houston, TX 77009.
e-mails: themoonprinciples@gmail.com and neyalbertoparedes@gmail.com
Phone numbers: 3108660814 - 4243992391
Objective: The aim of this study was to analyze the microimplant displacement pattern of the MSE expander on cone-beam computed tomography (CBCT).
Methods: Thirty-nine subjects (12 male and 27 female) with a mean age of 18.2 ± 4.2 years were treated successfully with MSE II. Pre- and post-expansion CBCT records were superimposed. Anterior and posterior inter-MI angle, neck and apical inter-MI distance, plate angle, palatal bone thickness at MI positions, and suture opening at MIs positions were measured and compared between the pre- and post-expansion records.
Results: The jackscrew plate slightly bends in both the anterior and posterior area. There was no significant difference between the amount of anterior and posterior suture opening at MIs positions (P>0.05). The posterior micro-implant to hemi-plate line was greater than the anterior one (P<0.05). The apical distance between the posterior MIs was greater than the anterior one (P<0.05). The palatal thickness at the anterior MIs was significantly higher than the bone thickness at the posterior MIs. (P>0.01).
Conclusions: In the coronal plane, the angulation between the anterior micro-implants in relation to the jackscrew plate was greater than the angulation between the posterior micro-implants due to the differential palatal bone thickness.
Keywords: expansion, microimplant-assisted rapid palatal expansion (MARPE), maxillary skeletal expander (MSE), bone-anchored maxillary expander (BAME)
Korean J Orthod
First Published Date July 21, 2023
Copyright © The Korean Association of Orthodontists.
Ney Paredes1,2, Ausama Gargoum2, Ramon Dominguez-Mompell3, Ozge Colak4, Joseph Bui2, Tam Duong2, Maya Giannetti5, Fernanda Silva2, Kendra Brooks2, Won Moon6,7
1 Private Practice, Innova Orthodontics, Houston, TX.
2 UCLA School of Dentistry, Section of Orthodontics, Center for Health Science, Room 63-082 CHS, 10833 Le Conte Ave, Box 951668, Los Angeles, CA 90095-1668.
3 Orthodontics Department, Rey Juan Carlos University, Madrid, Spain.
4 Orthodontics Department, State University of New York, at Buffalo, NY.
5 UCSF School of Dentistry, Section of Orthodontics
6 Adjunt Professor at Orthodontic and Craniofacial Development Research, Forsyth Institute, 245 First Street, Cambridge, MA 02142.
7 Professor at AJOU University, School of Medicine, Orthodontic Department, South Korea
Correspondence to:Won Moon and Ney Paredes
1550 Burnett St, Houston, TX 77009.
e-mails: themoonprinciples@gmail.com and neyalbertoparedes@gmail.com
Phone numbers: 3108660814 - 4243992391
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Objective: The aim of this study was to analyze the microimplant displacement pattern of the MSE expander on cone-beam computed tomography (CBCT).
Methods: Thirty-nine subjects (12 male and 27 female) with a mean age of 18.2 ± 4.2 years were treated successfully with MSE II. Pre- and post-expansion CBCT records were superimposed. Anterior and posterior inter-MI angle, neck and apical inter-MI distance, plate angle, palatal bone thickness at MI positions, and suture opening at MIs positions were measured and compared between the pre- and post-expansion records.
Results: The jackscrew plate slightly bends in both the anterior and posterior area. There was no significant difference between the amount of anterior and posterior suture opening at MIs positions (P>0.05). The posterior micro-implant to hemi-plate line was greater than the anterior one (P<0.05). The apical distance between the posterior MIs was greater than the anterior one (P<0.05). The palatal thickness at the anterior MIs was significantly higher than the bone thickness at the posterior MIs. (P>0.01).
Conclusions: In the coronal plane, the angulation between the anterior micro-implants in relation to the jackscrew plate was greater than the angulation between the posterior micro-implants due to the differential palatal bone thickness.
Keywords: expansion, microimplant-assisted rapid palatal expansion (MARPE), maxillary skeletal expander (MSE), bone-anchored maxillary expander (BAME)
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