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Head & Face Medicine
Published in: Head & Face Medicine 1/2015

Open Access 01-12-2015 | Research

Effects of a novel magnetic orthopedic appliance (MOA-III) on the dentofacial complex in mild to moderate skeletal class III children

Authors: Ning Zhao, Jing Feng, Zheng Hu, Rongjing Chen, Gang Shen

Published in: Head & Face Medicine | Issue 1/2015

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Abstract

Introduction

The objective of this study was to evaluate the changes of skeletal and dental structures in mild to moderate skeletal Class III children following the use of a new magnetic orthopedic appliance (MOA-III).

Methods

A total of 36 patients (14 boys and 22 girls, mean age 9 years and 5 months) who presented with a mild to moderate skeletal Class III jaw discrepancy were treated with MOA-III. Another group of 20 untreated patients (9 boys and 11 girls, mean age 9 years and 2 months) with the same level of deformity served as the control group. The average treatment time was 6.6 months. Radiographs were taken at the same time intervals for both groups. A paired t test was used to determine the significant differences before and after treatment, and a two-sample t test was used to analyze the differences between the treatment and control groups.

Results

The anterior crossbite in all subjects was corrected after MOA-III therapy. The maxillomandibular relationship showed favorable changes (ANB, Wits, overjet increased significantly, P < 0.001). The maxilla was anteriorly positioned (SNA, ptm-A, ptm-S increased significantly, P < 0.001) with clockwise rotation (PP-FH increased, P < 0.001). The mandible showed a slight downward and backward rotation (SNB decreased, P < 0.05, MP-SN, Y-axis increased, P < 0.05). The length of the mandibular body showed no significant changes (Go-Pg, P > 0.05). Significant upper incisor proclination and lower incisor retroclination were observed (UI-NA increased, P < 0.001, LI-NB, FMIA decreased, P < 0.001). The upper lip moved forward, and the lower lip moved backward (UL-EP increased, P < 0.001, LL-EP decreased, P < 0.05). In the control group, most of the parameters showed normal growth, except for some unfavorable mandibular skeletal and soft tissue changes (Go-Pg, Go-Co, MP-SN, N′-SN-Pg′ increased, P < 0.001). Significant positive changes were induced with the MOA-III appliance compared to the untreated group.

Conclusions

The MOA-III was effective for the early treatment of a mild to moderate Class III malocclusion in children.
Literature
1.
Dermaut LR, Aelbers CM. Orthopedics in orthodontics: Fiction or reality. A review of the literature--Part II. Am J Orthod Dentofacial Orthop. 1996;110:667–71.CrossRefPubMed
2.
3.
4.
Muller M. The use of magnets in orthodontics: an alternative means to produce tooth movement. Eur J Orthod. 1984;6:247–53.CrossRefPubMed
5.
Sandler JP. An attractive solution to unerupted teeth. Am J Orthod Dentofacial Orthop. 1991;100:489–93.CrossRefPubMed
6.
Mancini GP, Noar JH, Evans RD. The physical characteristics of neodymium iron boron magnets for tooth extrusion. Eur J Orthod. 1999;21:541–50.CrossRefPubMed
7.
Cole BO, Shaw AJ, Hobson RS, Nunn JH, Welbury RR, Meechan JG, et al. The role of magnets in the management of unerupted teeth in children and adolescents. Int J Paediatr Dent. 2003;13:204–7.CrossRefPubMed
8.
Woods MG, Nanda RS. Intrusion of posterior teeth with magnets: an experiment in nongrowing baboons. Am J Orthod Dentofacial Orthop. 1991;100:393–400.CrossRefPubMed
9.
Hwang HS, Lee KH. Intrusion of overerupted molars by corticotomy and magnets. Am J Orthod Dentofacial Orthop. 2001;120:209–16.CrossRefPubMed
10.
Blechman AM. Magnetic force systems in orthodontics. Clinical results of a pilot study. Am J Orthod. 1985;87:201–10.CrossRefPubMed
11.
Kawata T, Hirota K, Sumitani K, Umehara K, Yano K, Tzeng HJ, et al. A new orthodontic force system of magnetic brackets. Am J Orthod Dentofacial Orthop. 1987;92:241–8.CrossRefPubMed
12.
Bernhold M, Bondemark L. A magnetic appliance for treatment of snoring patients with and without obstructive sleep apnea. Am J Orthod Dentofacial Orthop. 1998;113:144–55.CrossRefPubMed
13.
Darendeliler MA, Chiarini M, Joho JP. Early class III treatment with magnetic appliances. J Clin Orthod. 1993;27:563–9.PubMed
14.
Vardimon AD, Graber TM, Stutzmann J, Voss L, Petrovic AG. Reaction of the pterygomaxillary fissure and the condylar cartilage to intermaxillary Class III magnetic mechanics. Am J Orthod Dentofacial Orthop. 1994;105:401–13.CrossRefPubMed
15.
Vardimon AD, Graber TM, Voss LR, Muller TP. Functional orthopedic magnetic appliance (FOMA) III--modus operandi. Am J Orthod Dentofacial Orthop. 1990;97:135–48.CrossRefPubMed
16.
Vardimon AD, Stutzmann JJ, Graber TM, Voss LR, Petrovic AG. Functional orthopedic magnetic appliance (FOMA) II--modus operandi. Am J Orthod Dentofacial Orthop. 1989;95:371–87.CrossRefPubMed
17.
Bondemark L, Kurol J. Distalization of maxillary first and second molars simultaneously with repelling magnets. Eur J Orthod. 1992;14:264–72.CrossRefPubMed
18.
Itoh T, Tokuda T, Kiyosue S, Hirose T, Matsumoto M, Chaconas SJ. Molar distalization with repelling magnets. J Clin Orthod. 1991;25:611–7.PubMed
19.
Gianelly AA, Vaitas AS, Thomas WM. The use of magnets to move molars distally. Am J Orthod Dentofacial Orthop. 1989;96:161–7.CrossRefPubMed
20.
Darendeliler MA, Strahm C, Joho JP. Light maxillary expansion forces with the magnetic expansion device. A preliminary investigation. Eur J Orthod. 1994;16:479–90.CrossRefPubMed
21.
Vardimon AD, Graber TM, Voss LR, Verrusio E. Magnetic versus mechanical expansion with different force thresholds and points of force application. Am J Orthod Dentofacial Orthop. 1987;92:455–66.CrossRefPubMed
22.
Dellinger EL. A clinical assessment of the Active Vertical Corrector--a nonsurgical alternative for skeletal open bite treatment. Am J Orthod. 1986;89:428–36.CrossRefPubMed
23.
Kiliaridis S, Egermark I, Thilander B. Anterior open bite treatment with magnets. Eur J Orthod. 1990;12:447–57.CrossRefPubMed
24.
Meral O, Yuksel S. Skeletal and dental effects during observation and treatment with a magnetic device. Angle Orthod. 2003;73:716–22.PubMed
25.
Noar JH, Shell N, Hunt NP. The performance of bonded magnets used in the treatment of anterior open bite. Am J Orthod Dentofacial Orthop. 1996;109:549–56. discussion 557.CrossRefPubMed
26.
Xu Y, Hu J, Li P. The effects of twin-block magnetic appliance on the early skeletal Class III malocclusion. Zhonghua Kou Qiang Yi Xue Za Zhi. 1999;34:148–50.PubMed
27.
Zhao N, Xu Y, Chen Y, Xu Y, Han X, Wang L. Effects of class III magnetic orthopedic forces on the craniofacial sutures of rhesus monkeys. Am J Orthod Dentofacial Orthop. 2008;133:401–9.CrossRefPubMed
28.
Tuncer C, Uner O. Effects of a magnetic appliance in functional Class III patients. Angle Orthod. 2005;75:768–77.PubMed
29.
Kim JH, Viana MA, Graber TM, Omerza FF, BeGole EA. The effectiveness of protraction face mask therapy: a meta-analysis. Am J Orthod Dentofacial Orthop. 1999;115:675–85.CrossRefPubMed
30.
Mitani H. Early application of chincap therapy to skeletal Class III malocclusion. Am J Orthod Dentofacial Orthop. 2002;121:584–5.CrossRefPubMed
31.
Deguchi T, McNamara JA. Craniofacial adaptations induced by chincup therapy in Class III patients. Am J Orthod Dentofacial Orthop. 1999;115:175–82.CrossRefPubMed
32.
Abu Alhaija ES, Richardson A. Long-term effect of the chincap on hard and soft tissues. Eur J Orthod. 1999;21:291–8.CrossRefPubMed
33.
Darendeliler MA, Sinclair PM, Kusy RP. The effects of samarium-cobalt magnets and pulsed electromagnetic fields on tooth movement. Am J Orthod Dentofacial Orthop. 1995;107:578–88.CrossRefPubMed
34.
Saleh M, Hajeer MY, Al-Jundi A. Short-term soft- and hard-tissue changes following Class III treatment using a removable mandibular retractor: a randomized controlled trial. Orthod Craniofac Res. 2013;16:75–86.CrossRefPubMed
35.
Darendeliler MA, Darendeliler A, Sinclair PM. Effects of static magnetic and pulsed electromagnetic fields on bone healing. Int J Adult Orthod Orthognath Surg. 1997;12:43–53.
36.
Yan QC, Tomita N, Ikada Y. Effects of static magnetic field on bone formation of rat femurs. Med Eng Phys. 1998;20:397–402.CrossRefPubMed
37.
Metadata
Title
Effects of a novel magnetic orthopedic appliance (MOA-III) on the dentofacial complex in mild to moderate skeletal class III children
Authors
Ning Zhao
Jing Feng
Zheng Hu
Rongjing Chen
Gang Shen
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Head & Face Medicine / Issue 1/2015
Electronic ISSN: 1746-160X
DOI
https://doi.org/10.1186/s13005-015-0092-7

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