Weibull characteristics and modulus calculation in adhesion studies: A methodological investigation

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dc.authorid0009-0003-5598-2267
dc.authorid0009-0009-0849-3755
dc.authorid0009-0003-9631-7116
dc.authorid0000-0001-6576-267X
dc.authorid0000-0002-9623-6098
dc.contributor.authorBerisha, Florentin
dc.contributor.authorŞener, Alpaslan
dc.contributor.authorCankja, Angelo
dc.contributor.authorUzun Pekintürk, Berre
dc.contributor.authorFreitas Brum Souza, Luiza
dc.contributor.authorÖzcan, Mutlu
dc.date.accessioned2026-04-30T12:25:46Z
dc.date.available2026-04-30T12:25:46Z
dc.date.issued2025
dc.departmentEnstitüler, Lisansüstü Eğitim Enstitüsü, Pedodonti Programı
dc.description.abstractObjective: This study aimed to determine the minimum number of specimens required to obtain statistically reliable conclusions in adhesion studies using the Weibull statistic and to estimate the probability of failure under defined conditions. Materials-methods: Specimens (N=160) were prepared from resin composite (RC: Brilliant, Coltene), lithium disilicate (LD: IPS e.max Press, Ivoclar), zirconia (YZ: Z-CAD, Metoxid AG), and titanium (TI: Ti CP Grade 4, Permascand). RC, YZ, and TI were air-abraded (50 µm Al2 O2 , 2.5 bar, 10 s), and LD was etched with 5% hydrofluoric acid (20 s). Resin cement cylinders (Ø=3×4 mm) were bonded using one of the following: Variolink Esthetic DC (Ivoclar), Panavia V5 (Kuraray Noritake), Panavia 21 (Kuraray Noritake), or Multilink Automix (Ivoclar). The combinations tested were as follows: RC-Variolink Esthetic DC/Panavia V5; LD-Variolink Esthetic DC/Panavia V5; YZ-Panavia 21/Multilink Automix; TI Panavia 21/Multilink Automix. Half of the specimens were stored at 37 °C for 24 h; the other half underwent thermocycling (x6000, 5-55 °C). Shear bond strength was tested (1 mm/min), and failure modes were assessed under digital microscopy. Weibull analysis evaluated bond reliability for 10, 20, 30 and 40 specimens in each group. Maximum likelihood estimation and 95% confidence intervals determined differences. Results: For RC, Variolink Esthetic DC showed higher characteristic strength (η) at n=10 and 20 vs. n=30 and 40. Panavia V5 showed a significant decrease from n=10 to 40 only in the non-aged condition. In LD, both cements showed decreasing η with increasing n. In YZ and TI, both Panavia 21 and Multilink Automix showed reduced characteristic strength with increasing n. Failures were mainly cohesive in LD but adhesive with the other materials. Conclusions: Increasing sample size reduced characteristic strength (η) across all materials, indicating that small sample sizes overestimate adhesive performance. Larger samples yield more reliable estimates. The Weibull modulus (β) remained stable or increased slightly after aging, especially for zirconia.
dc.identifier.citationBerisha, F., Şener, A., Cankja, A., Uzun Pekintürk, B., Freitas Brum Souza, L., & Özcan, M. (2025). Weibull characteristics and modulus calculation in adhesion studies: A methodological investigation. M. Özcan (Ed.), Abstracts from the 48th Annual Conference of the European Prosthodontic Association (EPA) 11th - 13th September 2025 Cappadocia, Turkey Poster Presentations, (p. 109), Cappadocia, Dennis Barber Journals.
dc.identifier.endpage109
dc.identifier.issn2396-8893
dc.identifier.issn0965-7452
dc.identifier.scopusqualityQ1
dc.identifier.startpage109
dc.identifier.urihttps://hdl.handle.net/20.500.13055/1460
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.indekslendigikaynak.otherESCI - Emerging Sources Citation Index
dc.institutionauthorUzun Pekintürk, Berre
dc.institutionauthorid0009-0003-9631-7116
dc.language.isoen
dc.publisherDennis Barber Journals
dc.relation.ispartofAbstracts from the 48th Annual Conference of the European Prosthodontic Association (EPA) 11th - 13th September 2025 Cappadocia, Turkey Poster Presentations
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Öğrenci
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectAdhesion
dc.subjectDental Materials
dc.subjectProsthodontics
dc.subjectWeibull
dc.subjectMethodology
dc.titleWeibull characteristics and modulus calculation in adhesion studies: A methodological investigation
dc.typeConference Object
dspace.entity.typePublication

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