Abstract: A teat for a baby or a child, the teat comprising a plate on which the dental arches rest and defining a bite plane, said plate being terminated towards the front by a vestibular screen against which at least one of the dental arches comes into abutment in a desired position, said plate being secured to means projecting forwards out from the mouth, the teat having a nipple projecting from the rear of the plate, said nipple being in register with the back portion of the tongue when the teat is in operation in the mouth of the baby or child so as to co-operate with the tongue and the palate and stimulate movement analogous to that of suckling.