{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T18:27:12Z","timestamp":1754159232456,"version":"3.41.2"},"reference-count":30,"publisher":"Wiley","license":[{"start":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T00:00:00Z","timestamp":1753315200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Prosthodontics"],"abstract":"Abstract<\/jats:title>Purpose<\/jats:title>The aim of this study was to investigate the impact of an increasing level of monomer contamination of isopropanol (isopropyl alcohol [IPA]) during post\u2010rinsing on the dimensional stability of test samples produced by vat photopolymerization. The effect of resin deposits due to insufficient post\u2010rinsing on the accuracy (volume, mean, and maximum deviation) of additive manufacturing workflows was investigated, which has received limited attention in studies on accuracy.<\/jats:p><\/jats:sec>Materials and Methods<\/jats:title>Forty test specimens (four groups, n<\/jats:italic> = 10) were produced from a commonly used resin for dental model fabrication and underwent post\u2010rinsing in IPA with different levels of monomer contamination (0, 10, 20, and 30\u00a0wt%). The dimensional stability was assessed by comparing the optical scan of the produced test specimens with the original digital design. Both the volume of the deposited resin and the effect of different model shapes (inner edges, smooth surfaces, and outer edges) on deposition were investigated. Statistical evaluation was performed using the Kruskal\u2013Wallis test and Dunn's test for pairwise comparisons with Holm correction. To simulate clinical conditions, 20 dental models (four groups, n<\/jats:italic> = 5) were produced, post\u2010processed, and examined using a scanning method.<\/jats:p><\/jats:sec>Results<\/jats:title>No significant deviations in specimen dimensions occurred when the monomer contamination was 0%\u201310%. In the range of 10%\u201320% contamination, a few significant deviations occurred in the area of sharp inner edges, \u201cinside structures\u201d and small structures (diameter <1000\u00a0\u00b5m). At contamination levels of 30%, significant deviations were observed eventually in all measured areas.<\/jats:p><\/jats:sec>Conclusions<\/jats:title>This study showed that, contrary to the manufacturer's specifications, the IPA should only be replaced during post\u2010rinsing if the monomer contamination of the rinsing solution is >20%. At contamination levels of 10%\u201320%, post\u2010rinsing of components with large smooth surfaces without sharp edges (e.g., custom trays) is possible without significant deformation. Only for components with very small, sharp\u2010edged, or inverted structures is it advisable to replace the IPA from a contamination level of 10%.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jopr.70011","type":"journal-article","created":{"date-parts":[[2025,7,25]],"date-time":"2025-07-25T03:35:02Z","timestamp":1753414502000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of monomer contamination of isopropanol during post\u2010rinsing on the accuracy of dental models fabricated by vat photopolymerization"],"prefix":"10.1111","author":[{"given":"Florian","family":"Flierl","sequence":"first","affiliation":[{"name":"Center for Dental Medicine Department of Prosthetic Dentistry Faculty of Medicine University of Freiburg Freiburg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1702-1679","authenticated-orcid":false,"given":"Benedikt C.","family":"Spies","sequence":"additional","affiliation":[{"name":"Center for Dental Medicine Department of Prosthetic Dentistry Faculty of Medicine University of Freiburg Freiburg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Severin","family":"Rothlauf","sequence":"additional","affiliation":[{"name":"Center for Dental Medicine Department of Prosthetic Dentistry Faculty of Medicine University of Freiburg Freiburg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9278-2203","authenticated-orcid":false,"given":"Kirstin","family":"Vach","sequence":"additional","affiliation":[{"name":"Institute of Medical Biometry and Statistics Faculty of Medicine University of Freiburg Freiburg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7095-4190","authenticated-orcid":false,"given":"Ralf 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