perforated saw

A saw with apertures behind each gum of the teeth, as originally made. These serve to prevent fractures at the bases of the teeth, and le en the amount of filing required, becoming themselves the gums after each refiling. perforated-space, s. Anat. (pl.): Two spaces in the cerebrum, the anterior perforated space or spot constituting a depre ion near the entrance of the Sylvian fi ure and the posterior, forming a deep fo a between the peduncles at the base.