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Most current percutaneous implant\u2010based solutions for transfemoral amputees make use of high stiffness intramedullary rods for skeletal fixation, which can have risks including infection, femoral fractures, and bone resorption due to stress shielding. This work details the cadaveric testing of a short, cortical bone stiffness\u2010matched subcutaneous implant, produced using additive manufacture, to determine bone implant micromotion and push\u2010out load. The results for the micromotions were all &lt;20\u2009\u03bcm and the mean push\u2010out load was 2,099 Newtons. In comparison to a solid control, the stiffness\u2010matched implant exhibited significantly higher micromotion distributions and no significant difference in terms of push\u2010out load. These results suggest that, for the stiffness\u2010matched implant at time zero, osseointegration would be facilitated and that the implant would be securely anchored. For these metrics, this provides justification for the use of a short\u2010stem implant for transfemoral amputees in this subcutaneous application. \u00a9 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:2104\u20132111, 2019<\/jats:p>","DOI":"10.1002\/jor.24389","type":"journal-article","created":{"date-parts":[[2019,6,5]],"date-time":"2019-06-05T09:29:14Z","timestamp":1559726954000},"page":"2104-2111","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Micromotion and Push\u2010Out Evaluation of an Additive Manufactured Implant for Above\u2010the\u2010Knee Amputees"],"prefix":"10.1002","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0004-6565","authenticated-orcid":false,"given":"Spencer C.","family":"Barnes","sequence":"first","affiliation":[{"name":"The Royal British Legion Centre for Blast Injury Studies Imperial College London  London United Kingdom"},{"name":"Department of Mechanical Engineering Imperial College London  London United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jon C.","family":"Clasper","sequence":"additional","affiliation":[{"name":"The Royal British Legion Centre for Blast Injury Studies Imperial College London  London United Kingdom"},{"name":"Defence Medical Group South East Frimley Park Hospital  Camberley United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anthony M. 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