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MRI can be used to assess adverse postoperative events. In this prospective randomized controlled trial, we evaluated MRI findings and whether platelet-rich plasma affected postoperative healing of the gluteal muscles (gluteus medius and minimus).<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Materials and methods<\/jats:title>\n            <jats:p>Forty patients with hip osteoarthritis requiring treatment with total hip arthroplasty, aged between 60 and 76 years, were included. Patients were randomized into two groups: 19 patients in the platelet-rich plasma group and 21 in the placebo group. Platelet-rich plasma or placebo was injected into the gluteus medius tendon incision line during closure. Postoperative hip MRI and plain radiographs were taken 3 and 12 months after surgery.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>MRI showed fatty atrophy of the gluteal muscles in all 40 patients (100%), gluteal muscle tear in 11 patients (28%), and atrophy in 16 patients (40%) at both 3 and 12 months postoperatively. Fluid collections related to the operated hip joint were seen in 18 patients (45%) at 3 months and 13 patients (33%) at 12 months, heterotopic ossification formation in nine patients (23%) at 3 months, and 12 patients (31%) at 12 months. There were no significant differences in imaging findings between the two groups.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>MRI can be a valuable tool for evaluating postoperative healing after total hip arthroplasty. Fatty atrophy of the gluteal muscles was a common finding. Platelet-rich plasma injection into the gluteus medius tendon did not improve healing detected by MRI.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s00256-025-04876-8","type":"journal-article","created":{"date-parts":[[2025,1,27]],"date-time":"2025-01-27T21:54:19Z","timestamp":1738014859000},"page":"1697-1706","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Platelet-rich plasma does not influence magnetic resonance imaging findings of the gluteus muscles after total hip arthroplasty through the Hardinge approach"],"prefix":"10.1007","volume":"54","author":[{"given":"Anette","family":"Nieminen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Janne","family":"Nurminen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anni","family":"Aavikko","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jani","family":"Puhakka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jussi","family":"Haapala","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hannes","family":"Keemu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juha","family":"Kukkonen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ari","family":"Alho","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Panu","family":"Uusalo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keijo","family":"M\u00e4kel\u00e4","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jussi","family":"Kosola","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,1,27]]},"reference":[{"issue":"4","key":"4876_CR1","doi-asserted-by":"publisher","first-page":"780","DOI":"10.2106\/00004623-200704000-00012","volume":"89","author":"S Kurtz","year":"2007","unstructured":"Kurtz S, Ong K, Lau E, Mowat F, Halpern M. 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