oral shields

or·al shields

removable appliances used in orthodontic treatment, usually placed between the labial and buccal mucosa and the teeth.

or·al shields

(ōrăl shēldz)
Removable appliances used in orthodontic treatment, usually placed between labial and buccal mucosa and teeth.
References in periodicals archive ?
Snorers who breathe through their mouths can use oral shields to help keep the mouth closed;
ORAL Shields and Helen Armstrong set up CJS Payroll in 1997 to provide locally-based payroll training and consultancy services.
For snorers who breathe through their mouth oral shields help to keep the mouth closed.