. Author manuscript; available in PMC: 2017 Aug 15.

Published in final edited form as: Am J Orthod Dentofacial Orthop. 2016 Aug;150(2):313–323. doi: 10.1016/j.ajodo.2015.12.029

Table II.

Nine simulated combinations to test maxillary expansion with deciduous molars, permanent molars, or a combination of the molars as anchors

Expansion force applied to teeth	Abbreviations
Maxillary right deciduous first molar to maxillary left deciduous first molar	URD-ULD
Maxillary right deciduous second molar to maxillary left deciduous second molar	URE-ULE
Maxillary right permanent first molar to maxillary left permanent first molar	UR6-UL6
Maxillary right deciduous first molar to maxillary left deciduous second molar	URD-ULE
Maxillary right deciduous first molar to maxillary left permanent molar	URD-UL6
Maxillary right deciduous second molar to maxillary left deciduous first molar	URE-ULD
Maxillary right deciduous second molar to maxillary left permanent first molar	URE-UL6
Maxillary right permanent molar to maxillary left deciduous first molar	UR6-ULD
Maxillary right permanent first molar to maxillary left deciduous second molar	UR6-ULE