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Home Maxillary “en masse” high-pull traction in Class II division 1 subjects: Which...

Maxillary “en masse” high-pull traction in Class II division 1 subjects: Which kind of skeletal outcomes does it produce?

Authors:

  • F. Silvestrini-Biavati
    Department of Orthodontics, University of Genoa, Genoa, Italy
  • L. Lazzarotti
    Department of Orthodontics, University of Genoa, Genoa, Italy
  • S. Bini
    Department of Orthodontics, University of Genoa, Genoa, Italy
  • M. Migliorati
    Department of Orthodontics, University of Genoa, Genoa, Italy
  • A. Ugolini
    Department of Orthodontics, University of Genoa, Genoa, Italy

DOI:

https://doi.org/10.23804/ejpd.2020.21.04.3

ABSTRACT


Aim

The aim of the present prospective study was to evaluate if the treatment performed using high-pull traction on a
Stephenson plate had real orthopaedic outcomes in subjects with severe Class II Division 1 malocclusion due to maxillary protrusion.

Methods

Twenty-three growing patients showing Class II Division 1 malocclusion (Stephenson plate group, SPG)
were treated and compared with an untreated Class II control group (CG – 21 subjects selected from the database of Bolton-Brush
Growth Study). Lateral cephalograms at T0 and T1 for both groups were analysed using cephalometric tracing by Jarabak, Pancherz
and Ghosh-Nanda.

Results

Orthopaedic forces were applied in SPG. SPG group showed significantly greater decrease than CG
group of SNA° (-1.4° vs +0.7°), ANB° (-1.3° vs +0°), WITS (-1° vs 0.6°), overjet (-4.1 mm vs +0.3 mm), molar relationships (–6.1° mm vs
-0.1 mm) and upper incisors proclination (1/SpP, -10.3° vs -1°). The maxilla substantially maintained its position (A/OLp +0.3 mm, SNA°
-1.4°) while the mandible slightly grew (Pg/OLp +1.7 mm; SNB° + 0.7°). Facial pattern and AFA/AFP ratio did not change.

Conclusion

The high-pull traction on the Stephenson plate produced more dental than skeletal outcomes in growing subjects,
despite of the application of orthopaedic forces.

PLUMX METRICS

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Publication date:

December /2020

Keywords:

class ii malocclusion, maxillary distal movement, orthopaedic force, orthopaedic high-pull traction, stephenson plate

Issue:

Vol.21 – n.4/2020

Page:

271 – 276

Publisher:

Ariesdue

Cite:


Harvard: F. Silvestrini-Biavati, L. Lazzarotti, S. Bini, M. Migliorati, A. Ugolini (2020) "Maxillary “en masse” high-pull traction in Class II division 1 subjects: Which kind of skeletal outcomes does it produce?", European Journal of Paediatric Dentistry, 21(4), pp271-276. doi: 10.23804/ejpd.2020.21.04.3
Vancouver: F. Silvestrini-Biavati, L. Lazzarotti, S. Bini, M. Migliorati, A. Ugolini. Maxillary “en masse” high-pull traction in Class II division 1 subjects: Which kind of skeletal outcomes does it produce?. European Journal of Paediatric Dentistry [Internet]. 2020Dec.1 [cited 2025May.12];21(4):271-276. Available from: https://www.ejpd.eu/abstract-pubmed/maxillary-en-masse-high-pull-traction-in-class-ii-division-1-subjects-which-kind-of-skeletal-outcomes-does-it-produce/
MLA: F. Silvestrini-Biavati, L. Lazzarotti, S. Bini, M. Migliorati, A. Ugolini Maxillary “en masse” high-pull traction in Class II division 1 subjects: Which kind of skeletal outcomes does it produce?. European Journal of Paediatric Dentistry. 2020;21(4):271-276

Copyright (c) 2021 Ariesdue

Creative Commons License

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

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    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
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