Table 1 Electronic search strategy

Scopus

Publication date:

From 1 January 1990 to 31 October 2021

#1 TITLE-ABS-KEY (mixed dentition ''OR'' children ''OR'' functional posterior cross bite ''OR'' posterior cross bite ''OR'' unilateral cross bite ''OR'' lateral cross bite ''OR'' mandibular shift ''OR'' lateral shift)

#2 TITLE-ABS-KEY (expansion ''OR'' maxillary expansion ''OR'' maxilla expansion ''OR'' interceptive treatment ''OR'' interceptive therapy ''OR'' interceptive orthodontics)

#3 TITLE-ABS-KEY (intermolar width ''OR'' intercanine width ''OR'' arches width ''OR'' transvers width ''OR'' midline correction)

#4 #1 AND #2 AND #3

EMBASE

Publication date:

From 1 January 1990 to 31 October 2021

#1 (mixed dentition ''OR'' children ''OR'' functional posterior cross bite ''OR'' posterior cross bite ''OR'' unilateral cross bite ''OR'' lateral cross bite ''OR'' mandibular shift ''OR'' lateral shift) #2 (expansion ''OR'' maxillary expansion ''OR'' maxilla expansion ''OR'' interceptive treatment ''OR'' interceptive therapy ''OR'' interceptive orthodontics)

#3 (intermolar width ''OR'' intercanine width ''OR'' arches width ''OR'' transvers width ''OR'' midline correction)

#4 #1 AND #2 AND #3

Google Scholar

Publication date:

From 1 January 1990 to 31 October 2021

#1 (mixed dentition ''OR'' children ''OR'' functional posterior cross bite ''OR'' posterior cross bite ''OR'' unilateral cross bite ''OR'' lateral cross bite ''OR'' mandibular shift ''OR'' lateral shift) AND (expansion ''OR'' maxillary expansion ''OR'' maxilla expansion ''OR'' interceptive treatment ''OR'' interceptive therapy ''OR'' interceptive orthodontics) AND (intermolar width ''OR'' intercanine width ''OR'' arches width ''OR'' transvers width ''OR'' midline correction)