Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Randomized Controlled Trial
. 2021 Jan 1;91(1):36-45.
doi: 10.2319/041920-332.1.

Comparison of skeletal maxillary transverse deficiency treated by microimplant-assisted rapid palatal expansion and tooth-borne expansion during the post-pubertal growth spurt stage

Haichao Jia, Li Zhuang, Nan Zhang, Yuanyuan Bian, Song Li
Randomized Controlled Trial

Comparison of skeletal maxillary transverse deficiency treated by microimplant-assisted rapid palatal expansion and tooth-borne expansion during the post-pubertal growth spurt stage

Haichao Jia et al. Angle Orthod. .

Abstract

Objective: To investigate the efficacy of microimplant-assisted rapid palatal expansion (MARPE) to treat skeletal maxillary discrepancies during the post-pubertal growth spurt stage.

Materials and methods: Sixty patients with skeletal maxillary transverse deficiency during the post-pubertal growth spurt stage were randomly divided into MARPE and Hyrax groups. Thirty patients (mean age: 15.1 ± 1.6 years) were treated using the four-point MARPE appliance; 30 patients (mean age, 14.8 ± 1.5 years) were treated using the Hyrax expander. Cone beam computed tomography scans and dental casts were obtained before and after expansion. The data were analyzed using paired t-tests and independent t-tests.

Results: The success rates of midpalatal suture separation were 100% and 86.7% for MARPE and Hyrax groups, respectively. Palatal expansion and skeletal to dental ratio at the first molar level were greater in the MARPE group (3.82 mm and 61.4%, respectively) than in the Hyrax group (2.20 mm and 32.3%, respectively) (P < .01). Reductions in buccal alveolar bone height and buccal tipping of the first molars were less in the MARPE group than in the Hyrax group (P < .01).

Conclusions: MARPE enabled more predictable and greater skeletal expansion, as well as less buccal tipping and alveolar height loss on anchorage teeth. Thus, MARPE is a better alternative for patients with skeletal maxillary deficiency during the post-pubertal growth spurt stage.

Keywords: Maxillary transverse deficiency; Microimplant-assisted rapid palatal expansion; Post-pubertal growth spurt stage; Tooth-borne expansion.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
MARPE appliance. (A) photograph of MARPE appliance. (B) MARPE installation. (C) Direct connection of jackscrew and tube. (D) Indirect connection.
Figure 2.
Figure 2.
Hyrax expander.
Figure 3.
Figure 3.
Transverse measurement of the maxillary first molar. NW indicates nasal width; SE_M1, suture expansion at first molar; MBBW, maxillary basal bone width; MAW, maxillary alveolar width.
Figure 4.
Figure 4.
Measurement of midpalatal suture. SE_ANS indicates suture expansion at ANS; SE_PNS, suture expansion at PNS; SE_M1, suture expansion at maxillary first molar.
Figure 5.
Figure 5.
Dental measurement of maxillary first molar. (A) AW_M1 indicates apical width of root of maxillary first molar. (B) CW_M1, crown width of maxillary first molar.
Figure 6.
Figure 6.
Measurement of tooth inclination. (A) TI_M1, Inclination of maxillary first molar. (B) TI_P1, Inclination of upper first premolar. R and L represent right and left, respectively.
Figure 7.
Figure 7.
Measurement of alveolar height of maxillary first molar. AH_M1 indicate alveolar height of maxillary first molar; R and L represent right and left, respectively.
Figure 8.
Figure 8.
Measurement of appliance expansion.
Figure 9.
Figure 9.
Twin sisters treated with MARPE and Hyrax appliances. (A, B, and C) Younger sister treated with MARPE. (D, E, and F) Older sister treated with Hyrax appliance.
See this image and copyright information in PMC

References

    1. Bishara SE, Staley RN. Maxillary expansion: clinical implications. Am J Orthod Dentofacial Orthop. 1987;91:3–14. - PubMed
    1. Bazargani F, Feldmann I, Bondemark L. Three-dimensional analysis of effects of rapid maxillary expansion on facial sutures and bones. Angle Orthod. 2013;83:1074–1082. - PMC - PubMed
    1. Wertz R, Dreskin M. Midpalatal suture opening: a normative study. Am J Orthod. 1977;71:367–381. - PubMed
    1. Baccetti T, Franchi L, Cameron CG, McNamara JA., Jr Treatment timing for rapid maxillary expansion. Angle Orthod. 2001;71:343–350. - PubMed
    1. Garib DG, Henriques JF, Janson G, de Freitas MR, Fernandes AY. Periodontal effects of rapid maxillary expansion with tooth-tissue-borne and tooth-borne expanders: a computed tomography evaluation. Am J Orthod Dentofacial Orthop. 2006;129:749–758. - PubMed

Publication types

LinkOut - more resources