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British Journal of Orthodontics Volume 6, 1979 - Issue 1
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Original Articles

The Expansion ‘W’ and its Modification in Orthodontic Treatment

J. A. SandhamVictoria Hospital, Kirkcaldy, Scotland
, B.D.S., F.D.S., R.C.S.(Ed.), D.Orth., R.C.S.(Eng.)
Pages 31-32 | Published online: 21 Jun 2016
 
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Abstract

A quad helix expansion device is described and modifications shown which increase its range of action.

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