Retention period after treatment of posterior crossbite with maxillary expansion: a systematic review.

Julia Garcia Costa,Claudia Trindade Mattos,Thaís Magalhães Galindo,Adriana De Alcantara Cury-Saramago

doi:10.1590/2177-6709.22.2.035-044.oar

Julia Garcia Costa, Claudia Trindade Mattos + Show 2 more

Open Access

https://doi.org/10.1590/2177-6709.22.2.035-044.oar

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Abstract

ABSTRACTOBJECTIVE: The aim of this systematic review was to evaluate the duration of the retention period in growing patients undergoing maxillary expansion and its relation with posterior crossbite stability. METHODS: Search strategies were executed for electronic databases Cochrane Library, Web of Science, PubMed and Scopus, which were completed on January 15, 2016. The inclusion criteria included randomized, prospective or retrospective controlled trials in growing subjects with posterior crossbite; treated with maxillary expanders; retention phase after expansion; post-retention phase of at least 6 months. The exclusion criteria were anterior crossbite, craniofacial anomalies, surgery or another orthodontic intervention; case reports; author’s opinions articles, thesis, literature reviews and systematic reviews. The risk of bias of selected articles was assessed with Cochrane risk of bias tool for RCTs and Downs and Black checklist for non-RCTs.RESULTS: A total of 156 titles/abstracts was retrieved, 44 full-texts were examined, and 6 articles were selected and assessed for their methodological quality. The retention period after maxillary expansion ranged between 4 weeks and 16 months. Fixed (acrylic plate, Haas, Hyrax and quad-helix) or removable (Hawley and Hawley expander) appliances were used for retention.CONCLUSIONS: Six months of retention with either fixed or removable appliances seem to be enough to avoid relapse or to guarantee minimal changes in a short-term follow-up.

Highlights

IntroductionPosterior crossbite is a common malocclusion in the deciduous and mixed dentitions, with prevalence rates of 7.5%1 to 22%,2 and in the permanent dentition with rates of 10.2% to 14.4%.3
Posterior crossbite is a common malocclusion in the deciduous and mixed dentitions, with prevalence rates of 7.5%1 to 22%,2 and in the permanent dentition with rates of 10.2% to 14.4%.3The etiology of this malocclusion may be dental, skeletal and/or functional.[4]
The aim of this systematic review was to evaluate the duration of the retention period in growing patients undergoing maxillary expansion and its relation with posterior crossbite stability

Summary

Introduction

Posterior crossbite is a common malocclusion in the deciduous and mixed dentitions, with prevalence rates of 7.5%1 to 22%,2 and in the permanent dentition with rates of 10.2% to 14.4%.3. The etiology of this malocclusion may be dental, skeletal and/or functional.[4] Few studies have reported the self-correction of posterior crossbite in the deciduous dentition, related to the discontinuation of sucking habits and chronic respiratory childhood diseases.[5,6] this condition is usually not self-corrected.[4,7,8]. Studies with adolescents and adults have revealed that patients presenting posterior crossbite have an increased risk to develop craniomandibular disorders, showing more signs and symptoms of these conditions.[2,5] Several authors suggest the early treatment of crossbites to prevent mandibular dysfunction as well as craniofacial asymmetry.[7,8,9,10]

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