W-arch

W-arch

a fixed maxillary expansion device attached to the lingual part of the molars, with either bilateral or unilateral extension arms.
Farlex Partner Medical Dictionary © Farlex 2012

W-arch

(ahrch)
Fixed maxillary expansion device attached to lingual part of molars, with either bilateral or unilateral extension arms.
Medical Dictionary for the Dental Professions © Farlex 2012