{
  "abstract": "This in vitro study evaluated the effects of magnesium oxide (MgO) nanoparticles on the flexural strength, surface roughness, and color characteristics of a self-cure polymethyl methacrylate (PMMA) provisional crown material. A commercially available PMMA resin was modified with 0.3, 0.5, or 1.0% w/w MgO nanoparticles, while unmodified resin served as the control. A total of 144 specimens were prepared and allocated equally among the four groups for the three outcome assessments. Surface roughness was measured using a contact profilometer, flexural strength was determined using a three-point bending test according to ISO 4049, and color coordinates were recorded using a spectrophotometer in the CIE L*a*b* system. Data were analyzed using the Kruskal–Wallis test followed by Dunn’s post-hoc test with Holm correction. Surface roughness differed significantly among the groups ( p = 0.008), with the 1.0% MgO group exhibiting significantly lower roughness than the control. Flexural strength also differed significantly ( p < 0.001); the 0.5 and 1.0% MgO groups showed significantly higher values than the 0.3% group, while none differed significantly from the control. L* and b* did not differ significantly among the groups, whereas a* showed a significant shift ( p < 0.001). Control-referenced ΔE*ab values derived from the group mean CIELAB coordinates remained below established perceptibility and acceptability thresholds. Within the limitations of this study, 1.0% MgO reduced surface roughness while maintaining flexural strength and overall color characteristics comparable to the control.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "Preetham Kotian"
    },
    {
      "name": "I. N. Aparna"
    },
    {
      "name": "Gayathri Krishnamoorthy"
    },
    {
      "name": "Gauri Shahi"
    },
    {
      "name": "Shilpa S. Prabhu"
    },
    {
      "name": "Prajna Pramod Nayak"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5yj99tweeb6rf.bib",
  "cited_by": 0,
  "doi": "10.1038/s41598-026-74371-0",
  "fulltext_url": "https://doi.org/10.1038/s41598-026-74371-0",
  "id": "5yj99tweeb6rf",
  "issns": [
    "2045-2322"
  ],
  "landing_url": "https://www.nature.com/articles/s41598-026-74371-0",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "Q"
    ],
    [
      "lcc",
      "R"
    ],
    [
      "openalex",
      "3505|Dental materials and restorations"
    ]
  ],
  "openalex": "W7221835307",
  "pdf_url": "https://www.nature.com/articles/s41598-026-74371-0.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/5yj99tweeb6rf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:28Z",
      "native_id": "10.1038/s41598-026-74371-0",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s41598-026-74371-0"
    },
    {
      "first_seen": "2026-10-30T13:45:53Z",
      "native_id": "774b1bc4b28b48c5afe5b866caa42f31",
      "source": "doaj",
      "url": "https://doi.org/10.1038/s41598-026-74371-0"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "lcc:R",
      "subfield": "general"
    }
  ],
  "title": "Effect of magnesium oxide nanoparticles on the flexural strength, surface roughness, and color of self-cure PMMA provisional crowns",
  "title_text": "Effect of magnesium oxide nanoparticles on the flexural strength, surface roughness, and color of self-cure PMMA provisional crowns",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:45:53Z",
  "url": "https://research.draconitic.com/paper/5yj99tweeb6rf",
  "venue": "Scientific Reports",
  "versions": []
}