{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T10:55:34Z","timestamp":1788173734481,"version":"build-2803163510"},"reference-count":57,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2022,8,19]],"date-time":"2022-08-19T00:00:00Z","timestamp":1660867200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Fondazione Cariplo and Regione Lombardia"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>In recent years, many research studies have focused on the application of 3D printing in the production of orthopaedic back braces. Several advantages, such as the ability to customise complex shapes, improved therapeutic effect and reduced production costs place this technology at the forefront in the ongoing evolution of the orthopaedic sector. In this work, four different materials, two of them poly(lactic acid) (PLA) and two of them poly(ethylene terephthalate glycol) (PETG), were characterised from a thermal, mechanical, rheological and morphological point of view. Our aim was to understand the effects of the material properties on the quality and functionality of a 3D-printed device. The specimens were cut from 3D-printed hemi-cylinders in two different orientation angles. Our results show that PETG-based samples have the best mechanical properties in terms of elastic modulus and elongation at break. The PLA-based samples demonstrated typical brittle behaviour, with elongation at break one order of magnitude lower. Impact tests demonstrated that the PETG-based samples had better properties in terms of energy absorption. Moreover, 3D-printed PETG samples demonstrated a better surface finishing with a more homogenous fibre\u2013fibre interface. In summary, we demonstrate that the right choice of material and printing conditions are fundamental to satisfy the quality and functionality required for a scoliosis back brace.<\/jats:p>","DOI":"10.3390\/ma15165724","type":"journal-article","created":{"date-parts":[[2022,8,21]],"date-time":"2022-08-21T23:51:01Z","timestamp":1661125861000},"page":"5724","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["A Comparative Study for Material Selection in 3D Printing of Scoliosis Back Brace"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6658-004X","authenticated-orcid":false,"given":"Alfredo","family":"Ronca","sequence":"first","affiliation":[{"name":"Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy, Via Previati 1\/C, 23900 Lecco, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valentina","family":"Abbate","sequence":"additional","affiliation":[{"name":"Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy, Via Previati 1\/C, 23900 Lecco, Italy"},{"name":"Department of Chemical, Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Napoli, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8513-8222","authenticated-orcid":false,"given":"Davide Felice","family":"Redaelli","sequence":"additional","affiliation":[{"name":"Institute of Intelligent Industrial Systems and Technologies for Advanced Manufacturing (STIIMA) National Research Council of Italy, Via Previati 1\/C, 23900 Lecco, Italy"},{"name":"Scientific Institute IRCCS E. Medea, Via Don Luigi Monza 20, 23842 Bosisio Parini, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5977-8090","authenticated-orcid":false,"given":"Fabio Alexander","family":"Storm","sequence":"additional","affiliation":[{"name":"Scientific Institute IRCCS E. Medea, Via Don Luigi Monza 20, 23842 Bosisio Parini, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giacomo","family":"Cesaro","sequence":"additional","affiliation":[{"name":"Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cristina","family":"De Capitani","sequence":"additional","affiliation":[{"name":"Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy, Via Previati 1\/C, 23900 Lecco, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1048-3002","authenticated-orcid":false,"given":"Andrea","family":"Sorrentino","sequence":"additional","affiliation":[{"name":"Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy, Via Previati 1\/C, 23900 Lecco, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9999-8960","authenticated-orcid":false,"given":"Giorgio","family":"Colombo","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Politecnico di Milano, Via G. La Masa, 1, 20156 Milano, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paolo","family":"Fraschini","sequence":"additional","affiliation":[{"name":"Scientific Institute IRCCS E. Medea, Via Don Luigi Monza 20, 23842 Bosisio Parini, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luigi","family":"Ambrosio","sequence":"additional","affiliation":[{"name":"Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,19]]},"reference":[{"key":"ref_1","first-page":"875","article-title":"Idiopathic Scoliosis","volume":"107","author":"Trobisch","year":"2010","journal-title":"Dtsch. Arztebl. 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