The following tissues are designated as specified risk material: ... (ii) the skull including the brain and eyes, the tonsils and the spinal cord of ovine and caprine animals aged over 12 months or which have a permament incisor erupted from the gum, and the spleen of ovine and caprine animals of all ages.
Before the erupting teeth enter the mouth cavity, gum pads develop; these are slight elevations of the overlying oral mucous membrane. When tooth eruption is complete, the gum embraces the neck region of each tooth. As well as being attached to adjacent alveolar bone, gum is connected to the cement of each tooth and to the tooth enamel.
