Fig. 2From: An expansion to the Nägerl’s theory of proportionality in reduced alveolar bone height models: a 3D finite element analysis3D model of an upper central incisor with 20 points on its labial surface to be served as different force application sites. X, Y, and Z axes are displayed to show the three-dimensionality of the image, and the dark and light lines indicate the distance of 2500 µmBack to article page