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The PRISMA guidelines were followed, and the quality of studies was assessed. Data were extracted from the identified articles and summarised.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Twelve retrospective studies on 1,260 patients analyzed complications of conversion to total hip arthroplasty (cTHA) after internal fixation of the femur. After fixation with an intramedullary nail, cTHA showed a 6.01% dislocation rate, 3.14% periprosthetic fractures, 2.59% aseptic loosening, and 3.41% periprosthetic infections, with a 3.82% reoperation rate. Fixation with a plate\/screw system resulted in fewer complications but a higher incidence of periprosthetic fractures (11.57%). A notably higher dislocation rate of 10.04% was observed following fixation with cannulated screws.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This review confirms that cTHA after IFix of proximal femoral fractures is associated to an elevated rate of perioperative complications, with a higher incidence when cTHA is performed after intramedullary nail fixation; a higher incidence of intraoperative periprosthetic fractures is observed on those patients treated by plate\/screws system at first surgery. Unexpectedly, a higher rate of implant dislocations is recorded in those patients undergoing cTHAs after IFix by cannulated screws.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00068-025-02977-6","type":"journal-article","created":{"date-parts":[[2025,9,16]],"date-time":"2025-09-16T12:47:15Z","timestamp":1758026835000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Outcomes and complications of conversion THA after internal fixation of proximal femur fractures: a systematic review"],"prefix":"10.1007","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0716-4951","authenticated-orcid":false,"given":"Alberto","family":"Di Martino","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2616-0662","authenticated-orcid":false,"given":"Claudio","family":"D\u2019Agostino","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Riccardo","family":"Poluzzi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matteo","family":"Brunello","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giuseppe","family":"Geraci","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesco","family":"Traina","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cesare","family":"Faldini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,9,16]]},"reference":[{"key":"2977_CR1","doi-asserted-by":"publisher","first-page":"91","DOI":"10.1302\/0301-620X.101B6.BJJ-2018-1375.R1","volume":"101\u2013B","author":"A Smith","year":"2019","unstructured":"Smith A, Denehy K, Ong KL, et al. 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