Quad Helix Expander Ortholab | China Orthodontic
shared by ortholabchina on Sep 27
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The Quad Helix Expander is used to expand the maxillary arch and derotate the first molars by selectively making use of the four helical springs built into the design. it is capable of applying forces...
in numerous directions depending on how it is activated. The helical springs can be activated in unison or individually to achieve the desired results.
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https://chin...-expander/Category
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