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Randomized Controlled Trial
. 2011 May;81(3):370-4.
doi: 10.2319/062210-339.1. Epub 2011 Feb 7.

Effect of RME and headgear treatment on the eruption of palatally displaced canines: a randomized clinical study

Pamela Armi  1 , Paola Cozza, Tiziano Baccetti
Affiliations
Randomized Controlled Trial

Effect of RME and headgear treatment on the eruption of palatally displaced canines: a randomized clinical study

Pamela Armi et al. Angle Orthod. 2011 May.

Abstract

Objective: To determine the effectiveness of orthodontic treatment finalized on the maintenance/improvement the upper arch perimeter to assist in the successful eruption of palatally displaced maxillary canines (PDCs).

Materials and methods: The randomized prospective design comprised 64 subjects with PDCs who were randomly assigned to one of three groups: cervical pull headgear (HG); rapid maxillary expansion and cervical pull headgear (RME/HG); or untreated control group (CG). Panoramic radiographs and lateral cephalograms were evaluated at the time of initial observation (T1) and after an average period of 18 months (T2). At T2 the success of canine eruption was evaluated. A superimposition study on lateral cephalograms was undertaken to evaluate the T1-T2 changes in the sagittal position of the upper molars in the three groups.

Results: The prevalence of successful eruption was 85.7% in the RME/HG group and 82.3% in the HG group. Both these prevalence rates were significantly greater than the success rate in untreated control subjects (36%). The cephalometric superimposition study showed a significant mesial movement of the upper first molars in the CG compared with the HG and RME/HG groups.

Conclusions: The use of rapid maxillary expansion and headgear (or headgear alone) in PDC cases increases the success rate of eruption of the canine significantly (almost three times more than in untreated controls).

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Figures

Figure 1
Figure 1
(A) Female patient (enrolled in the headgear group), age 11 years 8 months, with palatally displaced 1.3; (B) After 11 months of headgear treatment (at night only) the canine is fully erupted.
See this image and copyright information in PMC

Comment in

References

    1. Peck S, Peck L, Kataja M. Site-specificity of tooth maxillary agenesis in subjects with canine malpositions. Angle Orthod. 1996;66:473–476. - PubMed
    1. Thilander B, Jakobsson S. Local factors in impaction of maxillary canines. Acta Odont Scand. 1968;26:145–168. - PubMed
    1. Brin I, Becker A, Shalhav M. Position of the permanent canine in relation to anomalous or missing lateral incisors: a population study. Eur J Orthod. 1986;8:12–16. - PubMed
    1. Ericson S, Kurol J. Radiographic examination of ectopically erupting maxillary canines. Am J Orthod Dentofacial Orthop. 1987;91:483–492. - PubMed
    1. Baccetti T. A controlled study of associated dental anomalies. Angle Orthod. 1998;68:267–274. - PubMed

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