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American Journal of Neuroradiology, Vol 18, Issue 8 1522-1525, Copyright © 1997 by American Society of Neuroradiology

ARTICLES

CT-generated porous hydroxyapatite orbital floor prosthesis as a prototype bioimplant

RA Levy, TM Chu, JW Halloran, SE Feinberg and S Hollister
Department of Radiology, University of Michigan Hospitals, Ann Arbor, USA.

Hydroxyapatite bioceramic was used for the manufacture of an orbital floor prosthesis from spiral CT data acquired transaxially at 1-mm beam collimation, pitch of 1, and 0.2-mm reconstruction intervals. CT data were converted to vector file format for subsequent prosthesis manufacture on a stereo-lithography machine. The orbital floor prosthesis was engrafted onto an acrylic model of the orbit as a qualitative indication of its overall accuracy. High anatomic accuracy was achieved, as determined by visual inspection. Cross-hatching of the vector file data allowed a porous internal architecture of the prosthesis. Refinements in chemical structure of the hydroxyapatite bioceramic are expected to enhance mechanical properties.




Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X