Expansion never holds or does it?
Parker
W S
WS
D000293:Adolescent; D000328:Adult; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008875:Middle Aged; D009967:Orthodontic Appliances; D014087:Tooth Movement Techniques / Q000295:instrumentation / Q000379:methods