Table 1 Search strategy

#14

(rapid palatal expansion) AND chewing

7

#13

(rapid maxillary expansion) AND chewing

8

#12

(rapid palatal expansion) AND muscle activity

3

#11

(rapid maxillary expansion) AND muscle activity

4

#10

(rapid palatal expansion) AND facial musculature

1

#9

(rapid maxillary expansion) AND facial musculature

1

#8

(rapid palatal expansion) AND OSAS

9

#7

(rapid maxillary expansion) AND OSAS

14

#6

(rapid palatal expansion) AND breathing

88

#5

(rapid maxillary expansion) AND breathing

105

#4

(rapid palatal expansion) AND oral health

27

#3

(rapid maxillary expansion) AND oral health

29

#2

(rapid palatal expansion) AND general health

4

#1

(rapid maxillary expansion) AND general health

4