Effect of rapid maxillary expansion on sleep characteristics in children.
BACKGROUND
Rapid maxillary expansion (RME) is an orthopedic treatment procedure routinely used to treat constricted maxillary arches and also a potential additional treatment in children presenting with sleep-disordered breathing (SDB).


OBJECTIVE
The main objective of this study was to evaluate the effects of RME on sleep characteristics in children.


METHODS
Polysomnography was done on children of 8-13 years of age before expansion (T0), after expansion (T1) and after a period of 3 months after retention (T2). Bonded rapid maxillary expander was cemented in all children. Inter-molar distance was also measured at T0 and T2.


METHODS
Nonparametric Friedman test was used for comparing the averages of sleep parameters at different time period (T0, T1, T2). Wilcoxon signed ranks test was used for comparing the averages of inter-molar width (T0-T2). P < 0.05 were considered as significant.


RESULTS
All children showed an improvement in sleep parameters with an increase in sleep efficiency, decreased in arousal and desaturation index after expansion. Total sleep time showed a statistically significant increase after expansion. A statistically significant increase in inter-molar distance was obtained after expansion.


CONCLUSIONS
Rapid maxillary expansion is a useful treatment option for improving quality of sleep even in normal children without SDB. It also induces widening of the maxilla, corrects posterior crossbites and improves maxillary and mandibular dental arch coordination.
Department of Orthodontics and Dentofacial Orthopaedics, Amrita School of Dentistry, Cochin, Kerala, India.
Navya
N
Ashok
Department of Orthodontics and Dentofacial Orthopaedics, Amrita School of Dentistry, Cochin, Kerala, India.
N K Sapna
NK
Varma
Department of Orthodontics and Dentofacial Orthopaedics, Amrita School of Dentistry, Cochin, Kerala, India.
V V
VV
Ajith
Department of Sleep Medicine, Amrita Institute of Medical Sciences, Cochin, Kerala, India.
Siby
S
Gopinath
Polysomnography; rapid maxillary expansion; sleep-disordered breathing