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SHR Neuro Krebs Kardio Lipid

Guevara-Rojas, G; Figl, M; Schicho, K; Seemann, R; Traxler, H; Vacariu, A; Carbon, CC; Ewers, R; Watzinger, F.
Patient-specific polyetheretherketone facial implants in a computer-aided planning workflow.
J Oral Maxillofac Surg. 2014; 72(9): 1801-1812. (- Case Report)
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Autor/innen der Med Uni Graz:
Schicho Kurt
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Abstract:
In the present study, we report an innovative workflow using polyetheretherketone (PEEK) patient-specific implants for esthetic corrections in the facial region through onlay grafting. The planning includes implant design according to virtual osteotomy and generation of a subtraction volume. The implant design was refined by stepwise changing the implant geometry according to soft tissue simulations. One patient was scanned using computed tomography. PEEK implants were interactively designed and manufactured using rapid prototyping techniques. Positioning intraoperatively was assisted by computer-aided navigation. Two months after surgery, a 3-dimensional surface model of the patient's face was generated using photogrammetry. Finally, the Hausdorff distance calculation was used to quantify the overall error, encompassing the failures in soft tissue simulation and implantation. The implant positioning process during surgery was satisfactory. The simulated soft tissue surface and the photogrammetry scan of the patient showed a high correspondence, especially where the skin covered the implants. The mean total error (Hausdorff distance) was 0.81 ± 1.00 mm (median 0.48, interquartile range 1.11). The spatial deviation remained less than 0.7 mm for the vast majority of points. The proposed workflow provides a complete computer-aided design, computer-aided manufacturing, and computer-aided surgery chain for implant design, allowing for soft tissue simulation, fabrication of patient-specific implants, and image-guided surgery to position the implants. Much of the surgical complexity resulting from osteotomies of the zygoma, chin, or mandibular angle might be transferred into the planning phase of patient-specific implants. Copyright © 2014 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
Find related publications in this database (using NLM MeSH Indexing)
Adult -
Biocompatible Materials -
Computer-Aided Design -
Face - anatomy & histology
Facial Bones - surgery
Female -
Humans -
Image Processing, Computer-Assisted - methods
Imaging, Three-Dimensional - methods
Ketones -
Models, Anatomic -
Osteotomy - methods
Patient Care Planning -
Photogrammetry - methods
Polyethylene Glycols -
Prostheses and Implants -
Prosthesis Design -
Surgery, Computer-Assisted - methods
Tomography, X-Ray Computed - methods
User-Computer Interface -
Zygoma - abnormalities Zygoma - surgery

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