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Reconstruction of mandibular dysplasia using a statistical 3D shape model

Summary: Reconstruction of mandibular dysplasia using a
statistical 3D shape model
Stefan Zachow a,, Hans Lamecker a
, Barbara Elsholtz b
, Michael Stiller b
aZuse-Institute Berlin (ZIB), Takustraße 7, D-14195 Berlin
bZentrum für Zahn-, Mund- und Kieferheilkunde, Universitätsklinikum Charité Berlin, Campus Benjamin Franklin
A statistical 3D shape model of a regularly developed human mandible is presented. The shape model (often referred to as an
atlas) is created from 11 tomographic data sets, representing a mean mandibular shape including all of its variations to any
shape of the underlying training set. The atlas will serve as a foundation for the reconstruction of missing or malformed bony
structures. First preliminary results are presented for three different cases of distinct mandibular deformities, and it is shown,
that such a 3D shape model might provide a reasonable basis for the planning of a surgical reconstruction. Hence, the atlas will
be extended by at least 140 available data sets that have been acquired using a NewTom DVT.
Key words: surgery planning, mandibular reconstruction, statistical shape model, optimization
1. Introduction
Patients with distinct craniofacial deformities or missing bony structures require a surgical reconstruction that
in general is a very complex and difficult task. The main reasons for such malformations, as show in Figure 1, are
tumor related bone resections or craniofacial microsomia [1, 2]. In cases where the reconstruction cannot be guided
by the symmetry of anatomical structures, it becomes particularly challenging. Then a surgeon must compare the


Source: Andrzejak, Artur - Konrad-Zuse-Zentrum für Informationstechnik Berlin


Collections: Computer Technologies and Information Sciences