twin block	crossbow
bonded twin block	upper lower bite plane
orthognathic splints	hawley
herbst	begg
bionator	tru tain (clear retainer)
tad appliance	mouth guard
rme	bonded lingual palatal retainer
bonded rme	ura
lingual arch	lra
palatal arch	sved appliance
quad helix	spring aligner
tpa	slow expansion appliance
band and loop	frankle
anti habit	positioner
disimpacting appliance	activator
nance	open bite activator
hilgers	woodside activator
haas	teuscher appliance