{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,29]],"date-time":"2026-01-29T11:35:06Z","timestamp":1769686506001,"version":"3.49.0"},"reference-count":29,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T00:00:00Z","timestamp":1758585600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T00:00:00Z","timestamp":1758585600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The aim of the study was to design a standardized mechanical test setup and a corresponding finite element analysis to assess the stability and strength of both patient\u2010specific and conventional implants for posterior wall acetabular fractures. Ten synthetic hemi\u2010pelves with posterior wall fractures were biomechanically tested with two types of implants: a patient\u2010specific implant (PSI) and a seven\u2010hole plate conventional implant. 3D\u2010printed guides ensured reproducibility. The models were tested using an Instron machine. The protocol involved 10,000 cyclic load cycles with static tests at 3200\u2009N before and after to simulate early postoperative weightbearing conditions. Construct stiffness, stiffness over cyclic loading and fracture gapping were measured and compared. A finite element analysis was created with similar conditions to investigate stresses within the synthetic bone and fixation materials. The mechanical tests showed comparable stiffness for PSI (1.75\u2009kN\/mm) and the conventional implant (1.71\u2009kN\/mm,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.47). Stability over 10,000 cycles was similar, and fracture gapping remained minimal (0.0\u20130.8\u2009mm) without significant differences. No failure or plastic deformation occurred under 3200\u2009N loading. Finite element analysis confirmed that von Mises stresses remained below the yield stress. This study introduces a reproducible workflow for biomechanical testing of acetabular fractures using synthetic bone models and 3D\u2010printed guides. It serves as a step\u2010by\u2010step guideline and standard reference for pelvic biomechanical testing. Both patient\u2010specific and conventional implants, using a seven\u2010hole plate construct with one or two screws through the plate in the fracture fragment, provide stable fixation for large posterior wall fragments.\n                  <\/jats:p>","DOI":"10.1002\/jor.70062","type":"journal-article","created":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T14:41:47Z","timestamp":1758638507000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Mechanical Evaluation of Posterior Wall Acetabular Facture Fixation: Patient\u2010Specific Implants Versus Conventional Implants"],"prefix":"10.1002","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4161-3634","authenticated-orcid":false,"given":"Miriam G. E.","family":"Oldhoff","sequence":"first","affiliation":[{"name":"Department of Trauma Surgery University Medical Centre Groningen, University of Groningen Groningen The Netherlands"},{"name":"3D Lab University Medical Centre Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6882-0054","authenticated-orcid":false,"given":"Anne M. L.","family":"Meesters","sequence":"additional","affiliation":[{"name":"Department of Trauma Surgery University Medical Centre Groningen, University of Groningen Groningen The Netherlands"},{"name":"3D Lab University Medical Centre Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8527-960X","authenticated-orcid":false,"given":"Joep","family":"Kraeima","sequence":"additional","affiliation":[{"name":"3D Lab University Medical Centre Groningen, University of Groningen Groningen The Netherlands"},{"name":"Department of Oral and Maxillofacial Surgery University Medical Centre Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mehool R.","family":"Acharya","sequence":"additional","affiliation":[{"name":"Pelvic and Acetabular Reconstruction Unit Southmead Hospital, North Bristol NHS Trust Bristol UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8920-8796","authenticated-orcid":false,"given":"Kaj","family":"ten Duis","sequence":"additional","affiliation":[{"name":"Department of Trauma Surgery University Medical Centre Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2669-320X","authenticated-orcid":false,"given":"Jean\u2010Paul P. M.","family":"de Vries","sequence":"additional","affiliation":[{"name":"Department of Surgery, Division of Vascular Surgery University Medical Center Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0994-3104","authenticated-orcid":false,"given":"Bram B. J.","family":"Merema","sequence":"additional","affiliation":[{"name":"3D Lab University Medical Centre Groningen, University of Groningen Groningen The Netherlands"},{"name":"Department of Oral and Maxillofacial Surgery University Medical Centre Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9420-2732","authenticated-orcid":false,"given":"Frank F. A.","family":"IJpma","sequence":"additional","affiliation":[{"name":"Department of Trauma Surgery University Medical Centre Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,9,23]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.injury.2020.06.016"},{"issue":"1","key":"e_1_2_8_3_1","first-page":"2","article-title":"Operative Treatment of Displaced Fractures of the Acetabulum: A Meta\u2010Analysis","volume":"87","author":"Giannoudis P. V.","year":"2005","journal-title":"Journal of Bone and Joint Surgery. 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