MADs
Two types of MAD were used in this study, namely, MAD-H (Herbst appliance; 4Dental labs, Amsterdam, the Netherlands) and MAD-S (SomnoDent appliance; SomnoDent Flex, SomnoMed, Sydney, Australia). Both types of MAD were titratable, two-piece, custom-made MADs, and were randomly allocated to the participants [The detailed titration protocol was described previously [