The invention relates to a device for medical use intended to adapt to the dental arches, more particularly to the upper dental arch to facilitate the introduction of medical or surgical equipment in the oral cavity, while protecting the teeth It consists of a rigid, horseshoe-shaped gutter 1, which has in its median part two indentations facing each other, in V and U respectively, in the form of a horseshoe. internal wall 6 and external 7. The channel 1 is integral with a foam liner 11 which has a peripheral bead 17 on which a biological adhesive is deposited and an area 18 intended to act as a damper for the toothing placed in the liner. space 19. / P
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