The minimal width of the periodontal space

Abstract
Radiographs of horizontal serial sections of dentate human mandible disclose a picture of the periodontal space, the bony margin of which is highly irregular. The minimal width of this space was measured at four points roughly 90° apart and the average minimal width obtained. It is suggested that the usual clinical radiographic picture of the periodontal space of a particular tooth or teeth is such that a judgment of the width of the space cannot be made with any certainty.