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The major concerns of uncemented hip-stems, however, are peri-prosthetic fracture, thigh pain, and proximal femoral stress-\/strain-shielding. In this study, a novel design of uncemented hip-stem is proposed that will reduce such concerns, improve osseointegration, and benefit both osteoporotic and arthritic patients. The stem has a central titanium alloy core surrounded by a set of radial buttresses that are partly porous titanium, as is the stem tip. The aim of the study was to investigate the mechanical behaviour of the proposed partly-porous design, examining load transfer in the short-term, and comparing its strain-shielding behaviour with a solid metal implant. The long-term effect of implant-induced bone remodelling was also simulated. Computed tomography based three-dimensional finite element models of an intact proximal femur, and the same femur implanted with the proposed design, were developed. Peak hip contact and major muscle forces corresponding to level-walking and stair climbing were applied. The proposed partly-porous design had approximately 50% lower strain-shielding than the solid-metal counterpart. Results of bone remodelling simulation indicated that only 16% of the total bone volume is subjected to reduction of bone density. Strain concentrations were observed in the bone around the stem-tip for both solid and porous implants; however, it was less prominent for the porous design. Lower strain-shielding and reduced bone resorption are advantageous for long-term fixation, and the reduced strain concentration around the stem-tip indicates a lower risk of peri-prosthetic fracture.<\/jats:p>","DOI":"10.1177\/09544119241244537","type":"journal-article","created":{"date-parts":[[2024,4,21]],"date-time":"2024-04-21T23:43:50Z","timestamp":1713743030000},"page":"471-482","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":8,"title":["A novel design of hip-stem with reduced strain-shielding"],"prefix":"10.1177","volume":"238","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-6371-2714","authenticated-orcid":false,"given":"Tanmoy","family":"Loha","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rounak","family":"Bhattacharya","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3470-6223","authenticated-orcid":false,"given":"Bidyut","family":"Pal","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India"},{"name":"Department of Mechanical Engineering, Imperial College London, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew A","family":"Amis","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Imperial College London, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2024,4,21]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.3109\/17453671003685400"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-013-2941-7"},{"key":"e_1_3_3_4_2","unstructured":"NJR Editorial Committee and contributors 19th Annual Report 2022 https:\/\/www.njrcentre.org.uk\/njr-annual-report-2022\/. 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