{
  "abstract": "Objectives\n\nTo evaluate five post-polymerization protocols (385, 400 and 460 nm 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).Materials and methods\n\n360 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°C). FL was measured in a universal testing machine, TBW by laser scanning. Data were analysed with three-way ANOVA, Kruskal-Wallis and post-hoc tests (α = 0.05).Results\n\nThe protocol (p < 0.001) and the material (p < 0.001) significantly affected FL, whereas aging showed no significant main effect (p = 0.100); the three-way interaction was significant (p = 0.009). Initially, 460 nm yielded the highest FL for VAR (1505 ± 251 N) and FRE (1910 ± 237 N), the two-capacitor flashlight for CRO (1783 ± 333 N). Aging increased FL significantly in two and decreased it in three of 15 combinations. TBW (- 0.16 to - 0.35 mm) did not differ between protocols or materials.Conclusions\n\nThe 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.Clinical relevance\n\nMean 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.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, Munich, 80336, Germany. sophie.gekle@med.uni-muenchen.de.",
    "Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, Munich, 80336, Germany.",
    "Biomaterials and Technology, Department Research, University Center for Dental Medicine Basel UZB, University of Basel, Basel, Switzerland.",
    "Department of Reconstructive Dentistry, University Center for Dental Medicine Basel UZB, University of Basel, Basel, Switzerland.",
    "NK Optik GmbH, Baierbrunn, Germany.",
    "Department of Conservative Dentistry, Periodontology and Digital Dentistry, University Hospital, LMU Munich, Munich, Germany."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Sophie Gekle"
    },
    {
      "affs": [
        1,
        2
      ],
      "name": "Bogna Stawarczyk"
    },
    {
      "affs": [
        1,
        3
      ],
      "name": "Felicitas Mayinger"
    },
    {
      "affs": [
        4
      ],
      "name": "Ursula Kreitmair"
    },
    {
      "affs": [
        1
      ],
      "name": "Moritz Hoffmann"
    },
    {
      "affs": [
        1
      ],
      "name": "John Meinen"
    },
    {
      "affs": [
        5
      ],
      "name": "Marcel Reymus"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/btqh7kh7j8bvw.bib",
  "cited_by": 0,
  "doi": "10.1007/s00784-026-07232-9",
  "fulltext_url": "https://europepmc.org/articles/PMC13687201",
  "id": "btqh7kh7j8bvw",
  "issns": [
    "1432-6981",
    "1436-3771"
  ],
  "landing_url": "https://europepmc.org/article/MED/42907690",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3505|Dental materials and restorations"
    ]
  ],
  "openalex": "W7223116025",
  "pdf_url": "https://europepmc.org/articles/PMC13687201?pdf=render",
  "pmcid": "PMC13687201",
  "pmid": "42907690",
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/btqh7kh7j8bvw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:53Z",
      "native_id": "MED:42907690",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42907690"
    }
  ],
  "subjects": [],
  "title": "Impact of different post-polymerization protocols on fracture load and two-body wear of 3D-printed fixed dental prostheses.",
  "title_text": "Impact of different post-polymerization protocols on fracture load and two-body wear of 3D-printed fixed dental prostheses.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:53Z",
  "url": "https://research.draconitic.com/paper/btqh7kh7j8bvw",
  "venue": "Clinical oral investigations",
  "versions": []
}