{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T16:17:40Z","timestamp":1784305060029,"version":"3.55.0"},"reference-count":35,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T00:00:00Z","timestamp":1773964800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Support Program for Research Universities","award":["ADT-2024-11128"],"award-info":[{"award-number":["ADT-2024-11128"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Effects of gastric acid and antiacid medications on the surface and optical properties of resin-based restorative materials were evaluated. A hybrid-CAD\/CAM block, a 3D-printed resin, a paste-type composite, and a flowable composite were investigated (n = 9). Samples were prepared (1 mm thickness) and polished. All samples were exposed to gastric acid for 6 days, followed by a second exposure to distilled water, antiacid medication, or gastric acid for 56 min. Surface roughness, translucency, and fluorescence were assessed at baseline (T0), after gastric acid exposure (T1), and after the second exposure (T2). Surface morphology was examined by scanning electron microscopy. Data were analyzed with a significance level of p &lt; 0.05. Gastric acid exposure caused a significant increase in surface roughness and a significant reduction in translucency in all materials (p &lt; 0.05). CAD\/CAM and paste-type composites exhibited significantly higher roughness values than the 3D-printed and flowable composites (p &lt; 0.001). Fluorescence changes were observed in all groups, but the highest \u0394E00 values were observed in the 3D-printed and flowable composites (p &lt; 0.001). Gastric acid adversely affected the surface and optical properties of resin-based restorative materials, while antiacid medication showed limited, material-dependent protective effects.<\/jats:p>","DOI":"10.3390\/polym18060756","type":"journal-article","created":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T10:49:58Z","timestamp":1774003798000},"page":"756","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Effects of Gastric Acid and Antiacid Medications on Surface Roughness, Morphology, and Optical Properties of Resin-Based Materials"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9087-493X","authenticated-orcid":false,"given":"Ezgi","family":"T\u00fcter Bayraktar","sequence":"first","affiliation":[{"name":"Department of Restorative Dentistry, Faculty of Dentistry, Marmara University, \u0130stanbul 34854, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3542-4877","authenticated-orcid":false,"given":"Ay\u015fe Asl\u0131","family":"\u015eenol","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry, Faculty of Dentistry, Marmara University, \u0130stanbul 34854, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7167-6946","authenticated-orcid":false,"given":"Elif","family":"Alkan","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry, Faculty of Dentistry, Marmara University, \u0130stanbul 34854, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3116-2016","authenticated-orcid":false,"given":"Beng\u00fc","family":"Do\u011fu Kaya","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry, Faculty of Dentistry, \u00c7anakkale Onsekiz Mart University, \u00c7anakkale 17100, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2675-1764","authenticated-orcid":false,"given":"Dilek","family":"Ta\u011ftekin","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry, Faculty of Dentistry, Marmara University, \u0130stanbul 34854, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"5814","DOI":"10.1038\/s41598-020-62795-1","article-title":"Global prevalence and risk factors of gastro-oesophageal reflux disease (GORD): Systematic review with meta-analysis","volume":"10","author":"Nirwan","year":"2020","journal-title":"Sci. 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