Читать книгу Orthodontic Treatment of Impacted Teeth - Adrian Becker - Страница 86

The clinical aim was to learn why the right central incisor had refused to erupt, and to establish its exact location and anatomy and assess its proximity to other teeth and structures. The right central incisor was horizontally and sagitally re‐aligned in the axial (Figure 4.19a) and sagittal (Figure 4.19b) planes and the centre of the rotating tool was placed on its long axis in the coronal window (Figure 4.19c). Rotating the tool has revealed the tooth anatomy and interproximal contact areas. Figure 4.19(d) represents the cut produced by the rotating tool. In this case it demonstrates the point of contact with the lateral incisor (Animation 4.4) (orthodontic treatment by Dr Morris Strauss).

Fig. 4.17 Diagnosing resorption with multi‐planar reconstruction. The long axis of the lateral incisor from Figure 4.16 has been tilted to a vertical position in the coronal (c) and sagittal (b) planes. The rotating tool is placed on the tooth axis in the axial (a) plane. Window (d) shows the resorption in the disto‐palatal aspect.

Fig. 4.18 Diagnosing resorption with multi‐planar reconstruction (MPR). The axial (a) and the special tool window (b) are cropped from the MPR screen. The appearance in (b) reveals the resorption in the palatal aspect.