Quadhelix Swart, R. Quad Helix Expansion. Orthodontic Practice 2014 | Download Scientific Diagram
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Figure 2 from Treatment effects of a modified quad-helix in patients with dentoskeletal open bites. | Semantic Scholar
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 ...