{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T04:11:36Z","timestamp":1790223096082,"version":"4.1.0"},"reference-count":40,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2023,7,21]],"date-time":"2023-07-21T00:00:00Z","timestamp":1689897600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000024","name":"Canadian Institutes of Health Research","doi-asserted-by":"publisher","award":["AD1\u2010169987"],"award-info":[{"award-number":["AD1\u2010169987"]}],"id":[{"id":"10.13039\/501100000024","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2024,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Fixation in cementless total knee arthroplasty is provided by osseous integration. Radiography, radiostereometric analysis (RSA), and magnetic resonance imaging (MRI) were used simultaneously to investigate fixation. Relationships between RSA\u2010measured implant micromotions and MRI\u2010evaluated osseous integration at the component\u2013bone interface were assessed in 10 patients up to 6 months postoperation. Supine MRI (using multispectral imaging sequences) and RSA exams were performed to evaluate osseous integration and measure longitudinal migration, respectively. Inducible displacement was measured from standing RSA exams. Radiolucent lines were detected on conventional radiographs. Of 10 patients, 6 had fibrous membranes detected on MRI. No fluid or osteolytic interfaces were found, and no components were scored loose. Of 10 patients, 6 had radiolucent lines detected. Average maximum total point motion (MTPM) for longitudinal migration at 6 months was 0.816\u2009mm (range 0.344\u20131.462\u2009mm). Average MTPM for inducible displacement at 6 months was 1.083\u2009mm (range 0.553\u20131.780\u2009mm). Fictive points located in fibrous\u2010classified baseplate quadrants had greater longitudinal migration than fictive points located in baseplate quadrants with normal interfaces at 2 weeks (<jats:italic>p<\/jats:italic>\u2009=\u20090.031), 6 weeks (<jats:italic>p<\/jats:italic>\u2009=\u20090.046), and 3 months (<jats:italic>p<\/jats:italic>\u2009=\u20090.047), and greater inducible displacements at 3 months (<jats:italic>p<\/jats:italic>\u2009=\u20090.011) and 6 months (<jats:italic>p<\/jats:italic>\u2009=\u20090.045). Greater early micromotion may be associated with the presence of fibrous membranes at the component\u2013bone interface. Clinical significance: This multimodal imaging study contributes knowledge of the fixation of modern cementless TKA, supporting the notion that osseous integration is important for optimal implant fixation.<\/jats:p>","DOI":"10.1002\/jor.25662","type":"journal-article","created":{"date-parts":[[2023,7,14]],"date-time":"2023-07-14T01:41:10Z","timestamp":1689298870000},"page":"100-108","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["A multimodal assessment of cementless tibial baseplate fixation using radiography, radiostereometric analysis, and magnetic resonance imaging"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8923-8338","authenticated-orcid":false,"given":"Jordan S.","family":"Broberg","sequence":"first","affiliation":[{"name":"Department of Medical Biophysics Schulich School of Medicine &amp; Dentistry, Western University London Ontario Canada"},{"name":"Imaging 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