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Engineering could give reconstructive surgery a facelift
Date:7/12/2010

CHAMPAIGN, Ill. Facial reconstruction patients may soon have the option of custom-made bone replacements optimized for both form and function, thanks to researchers at the University of Illinois and the Ohio State University Medical Center.

Whether resulting from illness or injury, loss of facial bones poses problems for reconstructive surgeons beyond cosmetic implications: The patient's chewing, swallowing, speaking or even breathing abilities may be impaired.

"The mid-face is perhaps the most complicated part of the human skeleton," said Gabriel Paulino, the Donald Biggar Willett Professor of Engineering at U. of I. "What makes mid-face reconstruction more complicated is its unusual unique shape (bones are small and delicate) and functions, and its location in an area susceptible to high contamination with bacteria."

To fashion bone replacements, surgeons often will harvest bone from elsewhere in the patient's body the shoulder blade or hip, for example and manually fashion it into something resembling the missing skull portion. However, since other bones are very different from facial bones in structure, patients may still suffer impaired function or cosmetic distortion.

The interdisciplinary research team, whose research results will be published in the July 12 edition of the Proceedings of the National Academy of Sciences, applied an engineering design technique called topology optimization. The approach uses extensive 3-D modeling to design structures that need to support specific loads in a confined space, and is often used to engineer high-rise buildings, car parts and other structures.

"It tells you where to put material and where to create holes," said Paulino, a professor of civil and environmental engineering. "Essentially, the technique allows engineers to find the best solution that satisfies design requirements and constraints."

Facial reconstruction seemed a natural fit for the
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Contact: Liz Ahlberg
eahlberg@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign
Source:Eurekalert  

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