Quad-helix compression to decompensate molar inclination prior to skeletal expansion | Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Long Beach Orthodontist Explains Palatal Expansion
Orthodontics - A MODIFIED QUAD HELIX APPLIANCE ------------------------------- www.orthotropics.co.uk ------------------------------- This is one of the earliest appliances introduced for posterior expansion, it is made of 0.036 Blue Elgiloy and ...