fig4

Figure 4. Pruzansky-Kaban Type I. All mandibular and temporomandibular joint components are present and normal in shape, but they are hypoplastic to a variable degree, compared to the contralateral side. (a) Frontal facial view of an affected girl during childhood; (b) three-dimensional (3D) reconstruction of a multi-slice computed tomography (CT) scan of the skull of a Type I deformity, with deviation of the mandibular midline to the left; (c) submento-vertical projection of the same 3D CT scan, demonstrating mandibular asymmetry; (d) frontal view of an affected girl during adolescence; (e) frontal view of the occlusion of the same girl in (d), demonstrating cross-bite on the right; (f) orthopantomogram of the girl in (d), showing the joint structures with a normal shape and location, but with a degree of hypoplasia. Note the downward growth of the skull base on the affected side