Abstract
Exophthalmia is characterized by a protrusion of the eyeball. The most frequent surgery consists in an osteotomy of the orbit walls to increase the orbital volume and to retrieve a normal eye position. Only a few clinical observations have estimated the relationship between the eyeball backward displacement and the decompressed fat tissue volume. This paper presents a method to determine the relationship between the eyeball backward displacement and the osteotomy surface made by the surgeon, in order to improve exophthalmia reduction planning. A poroelastic finite element model involving morphology, material properties of orbital components, and surgical gesture is proposed to perform this study on 12 patients. As a result, the osteotomy surface seems to have a non-linear influence on the backward displacement. Moreover, the FE model permits to give a first estimation of an average law linking those two parameters. This law may be helpful in a surgical planning framework.
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Luboz, V., Pedrono, A., Ambard, D., Boutault, F., Swider, P., Payan, Y. (2004). A Finite Element Study of the Influence of the Osteotomy Surface on the Backward Displacement during Exophthalmia Reduction. In: Cotin, S., Metaxas, D. (eds) Medical Simulation. ISMS 2004. Lecture Notes in Computer Science, vol 3078. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-25968-8_6
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DOI: https://doi.org/10.1007/978-3-540-25968-8_6
Publisher Name: Springer, Berlin, Heidelberg
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