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ORIGINAL ARTICLE
Year : 2018  |  Volume : 8  |  Issue : 2  |  Page : 130-136

Effect of rapid maxillary expansion on glenoid fossa and condyle-fossa relationship in growing patients (MEGP): Study protocol for a controlled clinical trial


1 Department of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Lebanese University, Hadath, Lebanon
2 Department of Prosthodontics, School of Dentistry, Lebanese University, Hadath, Lebanon
3 Department of Orthodontics School of Dentistry, Paris Diderot University, Paris, France
4 Department of Biostatistics and Epidemiology, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon

Correspondence Address:
Dr. Mona Sayegh Ghoussoub
Department of Orthodontics, School of Dentistry, Lebanese University, Hadath
Lebanon
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jispcd.JISPCD_458_17

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Aims and Objectives: Rapid maxillary expansion (RME) is an orthodontic nonsurgical procedure aiming at increasing the width of the maxilla by opening mainly the intermaxillary suture in patients presenting a transverse maxillary skeletal deficiency. The objectives of the current prospective controlled clinical and radiographic study are to evaluate the hypothesis that RME in growing patients will result in radiographic changes at the level of interglenoid fossa distance, condyle-fossa relationship, and nasal cavity widths compared to the group who received no treatment initially and served as untreated control. Materials and Methods: In this prospective controlled clinical and radiographic study, forty healthy growing patients selected from a school-based population following a large screening campaign, ranging in age between 8 and 13 years, presenting a maxillary constriction with bilateral crossbite, and candidates for RME are being recruited. The first group will include participants willing to undergo treatment (n = 25) and the other group will include those inclined to postpone (n = 15). Results: The primary outcome is to compare radiologically the interglenoid fossa distance and the condyle-fossa relationship; nasal cavity width will be a secondary outcome. A multivariable analysis of Covariance model will be used, with the assessment of the time by group interaction, using age as covariate. The project protocol was reviewed and approved by the Ethics Committee of the Lebanese University, National Institute in Lebanon (CUEMB process number 31/04/2015). The study is funded by the Lebanese University and Centre National de Recherche Scientifique, Lebanon (Number: 652 on 14/04/2016). Conclusion: This prospective controlled clinical trial will give information about the effect of RME on the glenoid fossa and condyle-fossa relationship and its impact on the nasal cavity width. Trial Registration: Retrospectively registered in BioMed Central (DOI10.1186/ISRCTN77788053).


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