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In this work, the mechanical properties of metallic lattices made of five different unit cell types, Cubic (C), Truncated Octahedron (TO), Truncated Cubic (TC), Rhombicuboctahedron (RCO), and Rhombitruncated Cuboctahedron (RTCO), were evaluated under uniaxial compression at three different relative densities, 5%, 15%, and 45%. The evaluation was experimental, and it was compared with previous and new finite element simulations. Specimens for the experimental tests were fabricated in stainless steel 316L by laser powder bed fusion, and stress\u2013strain curves were obtained for the different lattices. The combination of the test results with a critical interpretation of the deformation mechanisms allowed us to confirm that two unit cell types, TO and RTCO, are stable for the whole range of relative densities evaluated. The other three unit cells exhibit more unpredictable behaviour, either due to manufacturing defects or limitations, or because their unstable compression behaviour leads to bucking. For these reasons, TO and RTCO unit cell types are mechanically more adequate for applications in the medical implant industry.<\/jats:p>","DOI":"10.3390\/met14070780","type":"journal-article","created":{"date-parts":[[2024,7,2]],"date-time":"2024-07-02T12:58:42Z","timestamp":1719925122000},"page":"780","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Evaluation of Lattice Structures for Medical Implants: A Study on the Mechanical Properties of Various Unit Cell Types"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4848-2614","authenticated-orcid":false,"given":"Pedro","family":"Nogueira","sequence":"first","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"given":"Pedro","family":"Lopes","sequence":"additional","affiliation":[{"name":"INEGI\u2014Institute of Science and Innovation in Mechanical and Industrial Engineering, Faculdade de Engenharia da Universidade do Porto, 4200-465 Porto, Portugal"}]},{"given":"Lu\u00eds","family":"Oliveira","sequence":"additional","affiliation":[{"name":"INEGI\u2014Institute of Science and Innovation in Mechanical and Industrial Engineering, Faculdade de Engenharia da Universidade do Porto, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9327-9092","authenticated-orcid":false,"given":"Jorge L.","family":"Alves","sequence":"additional","affiliation":[{"name":"INEGI\u2014Institute of Science and Innovation in Mechanical and Industrial Engineering, Faculdade de Engenharia da Universidade do Porto, 4200-465 Porto, Portugal"}]},{"given":"Jo\u00e3o P. G.","family":"Magrinho","sequence":"additional","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0451-6245","authenticated-orcid":false,"given":"Augusto Moita de","family":"Deus","sequence":"additional","affiliation":[{"name":"CeFEMA\u2014Center of Physics and Engineering of Advanced Materials, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1629-523X","authenticated-orcid":false,"given":"M. F\u00e1tima","family":"Vaz","sequence":"additional","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5284-8391","authenticated-orcid":false,"given":"M. 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