{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,22]],"date-time":"2025-12-22T18:40:05Z","timestamp":1766428805419,"version":"build-2065373602"},"reference-count":44,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2023,12,22]],"date-time":"2023-12-22T00:00:00Z","timestamp":1703203200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Applied Sciences"],"abstract":"<jats:p>This pilot study aimed to compare the fit accuracy of cobalt\u2013chromium (Co-Cr) and polyether ether ketone (PEEK) removable partial denture frameworks, produced by digital technologies. Two study models of previously prepared Kennedy\u2019s Class I and Class III mandibular dental arches were scanned. For each model, two frameworks were digitally designed and manufactured using a Co-Cr alloy via the selective laser melting (SLM) technique, and using PEEK via the milling technique. A qualitative assessment of the framework\u2019s fit accuracy to the corresponding study models was carried out using calibrated endodontic instruments and image amplification. Best-fit superimpositions between the reference design and the scanned frameworks were performed using the Geomagic Control X version 2018, 3D Systems software, allowing the expression of trueness by calculating the root mean square (RMS) value. Higher fit accuracy was observed for the milled frameworks, with the Class I PEEK framework showing the best fit accuracy to the corresponding model. RMS values were Class I\u2014148.3 \u03bcm for Co-Cr and 69.2 \u03bcm for PEEK; Class III\u2014107.2 \u03bcm for Co-Cr and 59.7 \u03bcm for PEEK. In the experimental conditions used, the milled PEEK frameworks showed better fit accuracy and higher trueness than the SLM-printed Co-Cr ones in both Kennedy classes.<\/jats:p>","DOI":"10.3390\/app14010118","type":"journal-article","created":{"date-parts":[[2023,12,22]],"date-time":"2023-12-22T04:44:40Z","timestamp":1703220280000},"page":"118","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Fit Accuracy of Cobalt\u2013Chromium and Polyether Ether Ketone Prosthetic Frameworks Produced Using Digital Techniques: In Vitro Pilot Study"],"prefix":"10.3390","volume":"14","author":[{"given":"Lara","family":"Barbosa","sequence":"first","affiliation":[{"name":"Department of Prosthodontics, Faculdade de Medicina Dent\u00e1ria, Universidade do Porto (FMDUP), 4200-393 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8583-8096","authenticated-orcid":false,"given":"Maria Helena","family":"Figueiral","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial (INEGI), Faculdade de Medicina Dent\u00e1ria, Universidade do Porto (FMDUP), 4200-393 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4327-1372","authenticated-orcid":false,"given":"Cristina Bettencourt","family":"Neves","sequence":"additional","affiliation":[{"name":"Biomedical and Oral Sciences Research Unit (UICOB), Faculdade de Medicina Dent\u00e1ria, Universidade de Lisboa (FMDUL), 1600-277 Lisboa, Portugal"}]},{"given":"Rodrigo","family":"Malheiro","sequence":"additional","affiliation":[{"name":"DigiTech, Faculdade de Medicina Dent\u00e1ria, Universidade de Lisboa (FMDUL), 1600-277 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0783-2355","authenticated-orcid":false,"given":"Manuel Ant\u00f3nio","family":"Sampaio-Fernandes","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, Faculdade de Medicina Dent\u00e1ria, Universidade do Porto (FMDUP), 4200-393 Porto, Portugal"}]},{"given":"Susana Jo\u00e3o","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, Faculdade de Medicina Dent\u00e1ria, Universidade do Porto (FMDUP), 4200-393 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9814-041X","authenticated-orcid":false,"given":"Maria Margarida","family":"Sampaio-Fernandes","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial (INEGI), Faculdade de Medicina Dent\u00e1ria, Universidade do Porto (FMDUP), 4200-393 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,12,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Lee, W.T., and Chen, Y.C. 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