Print Email Facebook Twitter Accuracy of Positioning Custom Triflange Acetabular Components in THA Revision and Tumor Resection Surgery – A 3D-CT Assessment Stud Title Accuracy of Positioning Custom Triflange Acetabular Components in THA Revision and Tumor Resection Surgery – A 3D-CT Assessment Stud Author Meurs, Willemijne (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Kaptein, Bart (mentor) Harlaar, J. (graduation committee) Nelissen, R.G.H.H. (mentor) Broekhuis, Demien (mentor) Degree granting institution Delft University of TechnologyUniversiteit LeidenErasmus Universiteit Rotterdam Programme Technical Medicine | Imaging and Intervention Date 2021-05-10 Abstract Introduction In recent years, there has been an increasing interest in custom triflange acetabular components (CTAC) for revision and oncological surgery. The aim of this study was to evaluate the surgical accuracy of positioning CTACs in patients receiving either total hip arthroplasty (THA) revision or tumor resection surgery, using a novel 3D analyzing technique. Method This retrospective cohort study included 35 patients (27 tumor and 8 THA revision cases), between February 2017 and March 2021. All patients received a CTAC. The planned and achieved implant position were assessed by means of a developed semi-automatic 3D-CT assessment method. The primary outcomes were the cup angles described as inclination, anteversion and cup rotation, and the translation of center of rotation (COR), pubic flange, ischial flange and ilium flange in three planes. Results The mean deviation, between planned and achieved, in inclination was 0.5° (SD: 3.9°), in anteversion 1.2° (SD: 6.1°) and in cup rotation 0.6° (SD: 3.2°). The mean deviation in COR in the sagittal plane was -0.8 mm (SD: 3.2), in the coronal plane -0.4 mm (SD: 6.3) and in the axial plane 0,6 mm (SD: 6,1). Translation of the ischial flange showed the largest aberration (median absolute value: 7.0 mm), followed by the pubic flange (6.4 mm) and the ilium flange (5.3 mm). Discussion A semi-automatic method to analyze the 3D position of CTAC was presented in this study. The results show good agreement between the planned and achieved implant position in patients receiving THA revision or tumor resection surgery. 89% of the components in this study were accurately positioned according to our criteria. Subject Pelvic bone defectscustom made implanttumor reconstruction To reference this document use: http://resolver.tudelft.nl/uuid:551ee277-3e7a-4219-86df-cc906e48bd24 Embargo date 2023-05-10 Part of collection Student theses Document type master thesis Rights © 2021 Willemijne Meurs Files PDF TMthesis_Willemijne_Final.pdf 25.57 MB Close viewer /islandora/object/uuid:551ee277-3e7a-4219-86df-cc906e48bd24/datastream/OBJ/view