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
. 2015 Nov;85(6):927-33.
doi: 10.2319/052414-366.1. Epub 2014 Dec 31.

Short-term effects produced by rapid maxillary expansion and facemask therapy in Class III patients with different vertical skeletal relationships

Chiara Pavoni  1 , Caterina Masucci  2 , Silvia Cerroni  3 , Lorenzo Franchi  4 , Paola Cozza  5
Affiliations

Short-term effects produced by rapid maxillary expansion and facemask therapy in Class III patients with different vertical skeletal relationships

Chiara Pavoni et al. Angle Orthod. 2015 Nov.

Abstract

Objective: To evaluate the dentoskeletal short-term effects of rapid maxillary expansion and facemask therapy (RME/FM) in a sample of Class III patients showing different vertical skeletal relationships.

Materials and methods: Seventy-nine patients (35 females and 44 males) having Class III malocclusion were consecutively treated using RME/FM therapy with application of the protraction force in a downward and forward direction and inclination of about 30° to the occlusal plane. All patients were evaluated at the beginning (T1; mean age, 7.7 years) and at the end (T2; mean age, 9.2 years) of orthopedic therapy and divided into three groups according to their vertical skeletal relationships: normal group (NG), hypodivergent group (HypoG), and hyperdivergent group (HyperG). Statistical comparisons between the three groups were performed on the starting forms (T1), the final forms (T2), and the treatment changes (T1-T2) using the ANOVA with Tukey's post hoc tests.

Results: Favorable modification in terms of maxillary advancement (changes in SNA ranging from 1.4° to 1.8°) and intermaxillary sagittal skeletal relationships (changes in Wits appraisal ranging from 2.5 mm to 3.5 mm) were recorded in all groups. The three groups showed no statistically significant differences in changes in either sagittal or vertical skeletal variables.

Conclusions: The various vertical skeletal features do not influence the short-term outcomes of RME/FM therapy.

Keywords: Class III malocclusion; Facemask; Orthopedic treatment.

PubMed Disclaimer

Figures

Figure 1. Occlusal view of bonded maxillary expander.
Figure 1.
Occlusal view of bonded maxillary expander.
Figure 2. Occlusal view of banded maxillary expander.
Figure 2.
Occlusal view of banded maxillary expander.
Figure 3. Extraoral lateral view of facemask.
Figure 3.
Extraoral lateral view of facemask.
See this image and copyright information in PMC

Comment in

  • Letters From Our Readers.
    Pavoni C, Masucci C, Cerroni S, Franchi L, Cozza P. Pavoni C, et al. Angle Orthod. 2016 Nov;86(6):1062. doi: 10.2319/0003-3219-86.6.1062. Angle Orthod. 2016. PMID: 27792425 Free PMC article. No abstract available.
  • Letters From Our Readers.
    Fulin J, Juan L. Fulin J, et al. Angle Orthod. 2016 Nov;86(6):1061. doi: 10.2319/0003-3219-86.6.1061. Angle Orthod. 2016. PMID: 27792426 Free PMC article. No abstract available.

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Toffol L, Pavoni C, Baccetti T, Franchi L, Cozza P. Orthopedic treatment outcomes in Class III malocclusion; a systematic review. Angle Orthod. 2008;78:561–573. - PubMed
    1. Ngan P, Yiu C, Hu A, Hägg U, Wei SHY, Gunel E. Cephalometric and occlusal changes following maxillary expansion and protraction. Eur J Orthod. 1998;20:237–254. - PubMed
    1. Macdonald KE, Kapust AJ, Turley PK. Cephalometric changes after the correction of Class III malocclusion with maxillary expansion/facemask therapy. Am J Orthod Dentofacial Orthop. 1999;116:13–24. - PubMed
    1. Westwood PV, McNamara JA, Jr, Baccetti T, Franchi L, Sarver DM. Long-term effects of Class III treatment with rapid maxillary expansion and facemask therapy followed by fixed appliances. Am J Orthod Dentofacial Orthop. 2003;123:306–320. - PubMed
    1. Vaughn GA, Mason B, Moon HB, Turley PK. The effects of maxillary protraction therapy with or without rapid palatal expansion: a prospective, randomized clinical trial. Am J Orthod Dentofacial Orthop. 2005;128:299–309. - PubMed

Publication types