Rapid prototyping (stereolithography) in the management of intra-articular calcaneal fractures
| Autor: | Juerg Hodler, G. M. Kacl, Burkhardt Seifert, M Amgwerd, Marco Zanetti, H Stucki, Otmar Trentz |
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| Přispěvatelé: | University of Zurich, Kacl, G M |
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Adult
Male medicine.medical_specialty Radiography 610 Medicine & health Surgical planning Fractures Bone Calcaneal fracture medicine Image Processing Computer-Assisted Humans 2741 Radiology Nuclear Medicine and Imaging Radiology Nuclear Medicine and imaging Neuroradiology Aged medicine.diagnostic_test Receiver operating characteristic business.industry Ultrasound Interventional radiology General Medicine 10060 Epidemiology Biostatistics and Prevention Institute (EBPI) Middle Aged medicine.disease Calcaneus ROC Curve Coronal plane Female Radiology business |
| Popis: | The purpose of this study was to evaluate and compare the diagnostic performance of stereolithography vs workstation-based three-dimensional (3D) reformations in intra-articular calcaneal fractures. A total of 30 intra-articular calcaneal fractures were examined using standard radiographs, coronal CT scans, and 2D and 3D reformations. The CT data were transferred to an outside institution, and stereolithograms were produced from photopolymer resin employing a laser beam system. 3D reformations and stereolithograms were analyzed in a blinded fashion by two staff radiologists. Receiver-operating-characteristic (ROC) curves were obtained for six clinically significant fracture components. Standard radiographs, coronal CT scans, and 2D reformations served as the standard of reference. The area under the ROC curves for 3D reformations and stereolithograms were 1.0 and 0.98 for abnormal tuber angles, 0.91 and 0.91 for anterior and middle talo-calcaneal joint involvement, 0. 90 and 0.95 for involvement of the posterior talo-calcaneal joint, 0. 65 and 0.78 for the presence of a lateral bulge, 0.80 and 0.81 for the involvement of the calcaneocuboidal joint, and 0.62 and 0.67 for the presence of a "tongue-type" fracture. No statistically significant difference was demonstrated for the two methods (Wilcoxon signed-rank test, p = 0.138). Based on our results stereolithograms did not prove to be statistically superior to workstation-based 3D reformations. Stereolithograms may still be useful for teaching purposes and for surgical planning at a thinking-efficacy level. |
| Databáze: | OpenAIRE |
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