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Clinical Oral Investigations
Published in: Clinical Oral Investigations 8/2015

01-11-2015 | Original Article

Comparison of the soft and hard tissue effects of two different protraction mechanisms in class III patients: a randomized clinical trial

Authors: Mevlut Celikoglu, Ibrahim Yavuz, Tuba Unal, Husamettin Oktay, Abdulvahit Erdem

Published in: Clinical Oral Investigations | Issue 8/2015

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Abstract

Objective

The objective of the present study is to test the null hypotheses that there were no significant differences for hard and soft tissue changes induced by mini maxillary protractor (MMP) and face mask and rapid maxillary expansion (FM/RME).

Materials and methods

Thirty-two patients who met the criteria were randomly divided into two groups: 16 patients (males/females 7/9) in the MMP group and 16 patients (males/females 6/10) in the FM/RME group. The patients in both groups were instructed to wear the appliances for at least 20 h per day until a 2-mm positive overjet was achieved. Hard and soft tissue profile changes observed by MMP and FM/RME were compared using paired and Student’s t tests.

Results

Class III malocclusion and negative overjet were improved by means of skeletal changes in conjunction with upper incisor proclination and lower incisor retroclination in both groups. Maxilla and surrounding soft tissues (SNA, Ls-E, and Ls-PMV) were significantly moved anteriorly with less rotation of the palatal plane in the MMP group. Mandibular incisors were found to be more retrusive in the FM/RME group (p = 0.024).

Conclusion

Both groups showed similar effects except more anterior movement of the maxilla and surrounding soft tissues with less rotation of the palatal plane and retrusion of lower incisors in the MMP group.

Clinical relevance

This is the first study to compare the soft and hard tissue changes induced by MMP appliance with a conventional FM /RME.
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Metadata
Title
Comparison of the soft and hard tissue effects of two different protraction mechanisms in class III patients: a randomized clinical trial
Authors
Mevlut Celikoglu
Ibrahim Yavuz
Tuba Unal
Husamettin Oktay
Abdulvahit Erdem
Publication date
01-11-2015
Publisher
Springer Berlin Heidelberg
Published in
Clinical Oral Investigations / Issue 8/2015
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-015-1408-5

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