IP Indian Journal of Orthodontics and Dentofacial Research 2020;6(4):229–235
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Review Article
Molar protaction –A review
Nikhil Asok
1,
*, Stuti Raj
1
, Sonal
1
, Ragni Tandon
1
, Shally Mahajan
1
, Zeyaullah Khan
1
1
Dept. of Orthodontics, Saraswati Dental College, Lucknow, Uttar Pradesh, India
ARTICLE INFO
Article history:
Received 24-09-2020
Accepted 05-11-2020
Available online 18-11-2020
Keywords:
Molar protraction
Biomechanics of molar protraction
ABSTRACT
Objectives: To provide a assortment of the various methods as of how the dogma of molar protraction is
achieved.
Materials and Methods: Orthodontically relevant sources of information were searched using electronic
databases including PubMed and Google Scholar and current reports.
Results: Due to the rapidly evolving new techniques in Orthodontics various methods have been explored
and much is left to be disclosed.
Conclusion: Keeping in mind the various methods through which one can approach Molar protraction,
one should always check on the ease of the procedure avoiding dexterity for the clinician and also patient
compliance must be seen. Over all the efficiency lies in the hand of the clinician more than the technique
itself.
© This is an open access article distributed under the terms of the Creative Commons Attribution
License (https://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and
reproduction in any medium, provided the original author and source are credited.
1. Introduction
Conventional anchorage provides very limited options for
anterior anchorage reinforcement during molar protraction,
especially in the mandibular arch. It typically involves
using the anterior teeth as the anchorage unit, but this
is limited by these teeth’s relatively low combined root
surface areas.
1
Protraction of molars is easier in the maxilla
than in the mandible owing to the relative abundance of
trabecular bone in the former. The large amount of cortical
bone and the surrounding powerful musculature in the
posterior mandible adversely affect anteroposterior molar
movement, which becomes even more difficult with time as
the alveolar bone narrows.
2
In lieu of surgical alveolar ridge
augmentation, substantial reductions in alveolar height and
width may severely limit mesial movement of the posterior
teeth, especially in hypodontia cases (where the alveolus is
hypoplastic) or long-standing edentulous sites (where it has
atrophied).
1
* Corresponding author.
E-mail address: nikhilasok@gmail.com (N. Asok).
Molar protraction is also more difficult in adults than in
children. Children and young adults have fewer periodontal
and root resorption problems during space closure than do
older adults.
2
This review article provides a brief idea on the
assortment of treatment approaches for molar protraction.
1.1. Indications
1. Class I, II and III malocclusions with generalized
spacing where overjet is minimal.
2. Class II molar relationship where mandibular is to be
protracted.
3. Cases of Class I malocclusion Type 1 where first
premolars extraction was done and after complete
retraction, the extraction space is left in the maxillary
arch
4. Cases of end on/full class II molar relation due
to mandibular retrognathism where second premolars
extraction were done to correct the molar relation.
5. Cases of class III molar relation, where the molar
correction is to be done and also to correct the reverse
overjet.
https://doi.org/10.18231/j.ijodr.2020.045
2581-9356/© 2020 Innovative Publication, All rights reserved. 229