{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,25]],"date-time":"2026-07-25T05:31:07Z","timestamp":1784957467502,"version":"3.55.0"},"reference-count":49,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2023,7,28]],"date-time":"2023-07-28T00:00:00Z","timestamp":1690502400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Background. In revision hip arthroplasty (RHA), establishing the center of rotation (COR) can be technically challenging due to the acetabular bone destruction that is usually present, particularly in severe cases such as Paprosky type II and III defects. The aim of this study was to demonstrate the use of open-source medical image reconstruction software and low-cost 3D anatomical models in pre-surgical planning of RHA. Methods. A total of 10 patients, underwent RHA and were included in the study. Computed tomography (CT) scans were performed for all cases, before surgery and approximately 1 week after the procedure. The reconstruction of CT data, 3D virtual planning of the COR and positioning of acetabular cups, including their inclination and anteversion angles, was carried out using the free open source software platform 3D Slicer. In addition, anatomical models of the pelvis were built on a desktop 3D printer from polylactic acid (PLA). Preoperative and postoperative reconstructed imaging data were compared for each patient, and the position of the acetabular cups as well as the COR were evaluated for each case. Results. Analysis of the pre- and post-op center of rotation position data indicated statistically insignificant differences for the location of the COR on the X-axis (1.5 mm, t = 0.5741, p = 0.5868) with a fairly strong correlation of the results (r = \u22120.672, p = 0.0982), whilst for the location of the COR in the Y and Z-axes, there was statistical dependence (Y axis, 4.7 mm, t = 3.168 and p = 0.0194; Z axis, 1.9 mm, t = 1.887 and p = 0.1081). A strong correlation for both axes was also observed (Y and Z) (Y-axis, r = 0.9438 and p = 0.0014; Z-axis, r = 0.8829 and p = 0.0084). Analysis of inclination angle values showed a statistically insignificant difference between mean values (3.9 degrees, t = 1.111, p = 0.3092) and a moderate correlation was found between mean values (r = \u22120.4042, p = 0.3685). Analysis of the anteversion angle showed a statistically insignificant difference between mean values (1.9 degrees, t = 0.8671, p = 0.4192), while a moderate correlation between mean values was found (r = \u22120.4782, p = 0.2777). Conclusions. Three-dimensional reconstruction software, together with low-cost anatomical models, are very effective tools for pre-surgical planning, which have great potential use in orthopedic surgery, particularly RHA. In up and in- and up and out-type defects, it is essential to establish a new COR and to identify three support points within the revision acetabulum in order to correctly position acetabular cups.<\/jats:p>","DOI":"10.3390\/diagnostics13152516","type":"journal-article","created":{"date-parts":[[2023,7,28]],"date-time":"2023-07-28T01:56:16Z","timestamp":1690509376000},"page":"2516","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Optimization of Revision Hip Arthroplasty Workflow by Means of Detailed Pre-Surgical Planning Using Computed Tomography Data, Open-Source Software and Three-Dimensional-Printed Models"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9363-4982","authenticated-orcid":false,"given":"Krzysztof","family":"Andrzejewski","sequence":"first","affiliation":[{"name":"Department of Orthopaedics and Trauma, Veteran\u2019s Memorial Hospital, Medical University of Lodz, Zeromskiego 113, 90-549 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcin","family":"Dom\u017calski","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Trauma, Veteran\u2019s Memorial Hospital, Medical University of Lodz, Zeromskiego 113, 90-549 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4035-7501","authenticated-orcid":false,"given":"Piotr","family":"Komorowski","sequence":"additional","affiliation":[{"name":"Division of Biophysics, Institute of Materials Science, Lodz University of Technology, Stefanowskiego 1\/15, 90-924 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5759-807X","authenticated-orcid":false,"given":"Jan","family":"Poszepczy\u0144ski","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Trauma, Veteran\u2019s Memorial Hospital, Medical University of Lodz, Zeromskiego 113, 90-549 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo\u017cena","family":"Rokita","sequence":"additional","affiliation":[{"name":"Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcin","family":"Elgalal","sequence":"additional","affiliation":[{"name":"Second Department of Radiology and Diagnostic Imaging, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"845","DOI":"10.1302\/2058-5241.5.200046","article-title":"Three-dimensional pre-operative planning of primary hip arthroplasty: A systematic literature review","volume":"5","author":"Moralidou","year":"2020","journal-title":"EFORT Open Rev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1080\/17453674.2019.1708655","article-title":"Outcome of revision hip arthroplasty in patients younger than 55 years: An analysis of 1,037 revisions in the Dutch Arthroplasty Register","volume":"91","author":"Kuijpers","year":"2020","journal-title":"Acta Orthop."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Park, J.-W., Won, S.-H., Moon, S.-Y., Lee, Y.-K., Ha, Y.-C., and Koo, K.-H. 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