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Eur J Paediatr Dent. 2018 Sep;19(3):199-204. doi: 10.23804/ejpd.2018.19.03.06.

Comparison between RME, SME and Leaf Expander in growing patients: a retrospective postero-anterior cephalometric study.

Author information

1
DDS, MS, Post-doc researcher, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Fondazione IRCCS Ca´ Granda, Ospedale Maggiore Policlinico, Milan, Italy.
2
DDS, MS Private Practice, Bra (CN), Italy.
3
DDS, MS Private Practice, Casale Monferrato (AL), Italy.
4
MD, DDS, MS, Private practice, Casale Monferrato (AL), Italy.
5
MD, DDS, MS, Full Professor and Dean, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Fondazione IRCCS Ca´ Granda, Ospedale Maggiore Policlinico, Milan, Italy.

Abstract

AIM:

The aim of this study is to compare the dental and orthopaedic effects of the Leaf Expander with rapid and slow maxillary expanders.

MATERIALS AND METHODS:

The sample comprised 30 patients with a posterior crossbite divided into three groups: the rapid maxillary expander (RME) group (3 m, 7 f), average age 8.9 years; the slow maxillary expander (SME) group (7 m, 3 f) average age 12.2 years; the Leaf Expander (LE) group (7 m, 3 f), average age 7.9 years. Postero-anterior cephalometric studies have been obtained at the beginning of the therapy (T1) and after 9 months (T2). Nasal width, maxillary width, mandibular width, upper permanent molars width have been measured by a calibrated examiner.

RESULTS:

All the measurements increased significantly after the treatment (paired t-test P=0.05). Maxillary average width increased of 4.2 mm (SD 3.6 mm) in RME; + 2.8 mm (SD 2.8 mm) in RSE and +3.6 mm (SD 2.2 mm) in LE group. Upper permanent molars width increased: + 5.4 mm (SD 3.31 mm) in RME; + 5.4 mm (SD 3.3 mm) in SME and + 3.8 mm (SD 2.1 mm) in LE group. No statistical differencesbetween the groups have been found (t-student test P=.05).

CONCLUSIONS:

The effectiveness of the LE in transversal deficiency correction has been confirmed.

PMID:
30063151
DOI:
10.23804/ejpd.2018.19.03.6
[Indexed for MEDLINE]
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