title: CT-generated porous hydroxyapatite orbital floor prosthesis as a prototype bioimplant.
abstract: 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.
authors.affiliation: Department of Radiology, University of Michigan Hospitals, Ann Arbor, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Levy
authors.forename: T M
authors.initials: TM
authors.lastname: Chu
authors.forename: J W
authors.initials: JW
authors.lastname: Halloran
authors.forename: S E
authors.initials: SE
authors.lastname: Feinberg
authors.forename: S
authors.initials: S
authors.lastname: Hollister
mesh_terms: D002648:Child; D017886:Durapatite; D006801:Humans; D007091:Image Processing, Computer-Assisted; D009915:Orbit / Q000473:pathology / Q000601:surgery*; D016348:Osseointegration; D019047:Phantoms, Imaging; D019736:Prostheses and Implants; D011474:Prosthesis Design; D017755:Prosthesis Fitting; D014057:Tomography, X-Ray Computed
chemical_list: D017886:Durapatite