{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T02:39:47Z","timestamp":1792636787914,"version":"4.5.0"},"reference-count":35,"publisher":"Springer Science and Business Media LLC","issue":"11","license":[{"start":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T00:00:00Z","timestamp":1792627200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T00:00:00Z","timestamp":1792627200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Clin Oral Invest"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To evaluate five post-polymerization protocols (385, 400 and 460\u00a0nm LEDs; one- and two-capacitor flashlights) and aging on fracture load (FL) and two-body wear (TBW) of three 3D-printed resins for fixed dental prostheses (FDPs).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and methods<\/jats:title>\n                    <jats:p>360 single-unit FDPs for mandibular molars were DLP-printed from two permanent resins (Varseo Smile CrownPlus [VAR], Crowntec [CRO]) and one temporary resin (Freeprint temp [FRE]). Half was artificially aged (480,000 mastication cycles, thermocycling 5\/55\u00b0C). FL was measured in a universal testing machine, TBW by laser scanning. Data were analysed with three-way ANOVA, Kruskal\u2013Wallis and post-hoc tests (\u03b1\u2009=\u20090.05).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The protocol (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001) and the material (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001) significantly affected FL, whereas aging showed no significant main effect (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.100); the three-way interaction was significant (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.009). Initially, 460\u00a0nm yielded the highest FL for VAR (1505\u2009\u00b1\u2009251\u00a0N) and FRE (1910\u2009\u00b1\u2009237\u00a0N), the two-capacitor flashlight for CRO (1783\u2009\u00b1\u2009333\u00a0N). Aging increased FL significantly in two and decreased it in three of 15 combinations. TBW (\u2212\u20090.16 to \u2212\u20090.35\u00a0mm) did not differ between protocols or materials.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The protocol effect on FL depended on the material and the aging level. Aging had no overall effect but increased FL in two combinations, possibly through continued polymerization. Protocol selection should consider the material.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical relevance<\/jats:title>\n                    <jats:p>Mean fracture loads exceeded reported maximum molar bite forces, although individual specimens failed below that range. Two-capacitor flashlight post-curing gave the most consistent performance for the materials tested.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00784-026-07232-9","type":"journal-article","created":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T01:57:09Z","timestamp":1792634229000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of different post-polymerization protocols on fracture load and two-body wear of 3D-printed fixed dental prostheses"],"prefix":"10.1007","volume":"30","author":[{"given":"Sophie","family":"Gekle","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bogna","family":"Stawarczyk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felicitas","family":"Mayinger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ursula","family":"Kreitmair","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Moritz","family":"Hoffmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Meinen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcel","family":"Reymus","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,10,22]]},"reference":[{"key":"7232_CR1","doi-asserted-by":"publisher","first-page":"2202","DOI":"10.3390\/ma18102202","volume":"18","author":"X Liang","year":"2025","unstructured":"Liang X, Yu B, Dai Y, Wang Y, Hu M, Zhong HJ et al (2025) Three-dimensional printing resin-based dental provisional crowns and bridges: Recent progress in properties, applications, and perspectives. 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This in vitro study did not involve human subjects, human tissue, or human data; therefore, institutional ethics committee approval was not required.","order":1,"name":"Ethics","label":"Ethical approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":2,"name":"Ethics","label":"Informed consent","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Conflict of interest: Author U. Kreitmair is employed by NK Optik GmbH, Baierbrunn, Germany, which manufactured the experimental post-polymerization devices used in this study and provided them for this investigation. The other authors declare that they have no competing interests.","order":3,"name":"Ethics","label":"Compliance with ethical standards","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"542"}}