Our patented*  WUNDERBRUSH for GUMS is perfect for cleaning bonded lingual retainers!  Its vertically-offset head enables direct access to all lingual retainers, and its short, 5-tuft head enables it to fit the narrowest of curvatures of the anterior mandibular arch!  And it's also a sulcus brush - to fit and clean subgingivally!

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*U.S. Patent # D931,618; E.U. Patent # DM/220 430; other U.S. and international patents pending