Abstract
Objective: the aim of this study is to compare the perception of pain and discomfort of patients and their guardians after treatment with miniscrew-anchored maxillary protraction therapy using hybrid and conventional Hyrax expanders. Material and Methods: Two groups will be assessed. Group HH was composed of 18 subjects (8 female, 10 male; initial age of 10.80 years) with Class III malocc…