Xiaowen Niu1, Gabriele Di Carlo1,2, Marie A Cornelis1, Paolo M Cattaneo1. 1. Section of Orthodontics, Department of Dentistry and Oral Health, Health, Aarhus University, Aarhus, Denmark. 2. Department of Oral and Maxillofacial Sciences, Unit of Pediatric Dentistry, Sapienza University of Rome, Rome, Italy.
Abstract
INTRODUCTION: The purpose of this systematic review was to evaluate the three-dimensional (3D) changes occurring at short- and long-term follow-up after rapid maxillary expansion (RME) in nasal cavity (NC) and upper airway (UA) in growing patients. METHODS: A literature search up to 1 July 2019 was performed. Randomized and non-randomized clinical trials and cohort studies comparing the effects of RME in a paediatric population using 3D analyses based on computed tomography (CT), cone-beam CT and MRI were included. The risks of bias of the included studies were assessed using the Cochrane Collaboration's risk of bias tool, the GRADE approach and a customized tool. The random-effects meta-analyses of the mean differences and 95% confidence intervals of NC and UA volume changes were carried out, followed by subgroup analyses. RESULTS: Twenty-seven studies were included, with 18 selected for quantitative synthesis. Immediately after expansion, the nasopharynx and oropharynx increased significantly. After 3 months of retention, only the NC and nasopharynx showed a significant volume increase. Two studies mentioned the use of a sleep-disordered breathing questionnaire, and one study reported the difference before and after RME. None of the 27 articles included assessed the correlation between the skeletal widening and NC or UA volume changes after RME. CONCLUSIONS: The existing evidence confirmed only the short-term positive effect of RME on expanding the volume of the NC and the upper part of the UA. However, long-term stability could not be sustained.
INTRODUCTION: The purpose of this systematic review was to evaluate the three-dimensional (3D) changes occurring at short- and long-term follow-up after rapid maxillary expansion (RME) in nasal cavity (NC) and upper airway (UA) in growing patients. METHODS: A literature search up to 1 July 2019 was performed. Randomized and non-randomized clinical trials and cohort studies comparing the effects of RME in a paediatric population using 3D analyses based on computed tomography (CT), cone-beam CT and MRI were included. The risks of bias of the included studies were assessed using the Cochrane Collaboration's risk of bias tool, the GRADE approach and a customized tool. The random-effects meta-analyses of the mean differences and 95% confidence intervals of NC and UA volume changes were carried out, followed by subgroup analyses. RESULTS: Twenty-seven studies were included, with 18 selected for quantitative synthesis. Immediately after expansion, the nasopharynx and oropharynx increased significantly. After 3 months of retention, only the NC and nasopharynx showed a significant volume increase. Two studies mentioned the use of a sleep-disordered breathing questionnaire, and one study reported the difference before and after RME. None of the 27 articles included assessed the correlation between the skeletal widening and NC or UA volume changes after RME. CONCLUSIONS: The existing evidence confirmed only the short-term positive effect of RME on expanding the volume of the NC and the upper part of the UA. However, long-term stability could not be sustained.
Authors: Yanxian Lin; Xiaoyang Ma; Yuanliang Huang; Lin Mu; Liya Yang; Minghao Zhao; Fang Xie; Chao Zhang; Jiajie Xu; Jianjian Lu; Li Teng Journal: Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi Date: 2021-01-15
Authors: Yara Al Senani; Al Jouharah Al Shammery; Abeer Al Nafea; Nisreen Al Absi; Omar Al Kadhi; Deema Al-Shammery Journal: Int J Environ Res Public Health Date: 2021-01-10 Impact factor: 3.390