Endocrown restorations in premolars: influence of remaining axial walls of tooth structure and restorative materials on fatigue resistance

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de Sergipe (UFS)-
Autor(es): dc.contributorDar Al-Uloom University-
Autor(es): dc.contributorUniversity of Amsterdam and Vrije Universiteit Amsterdam-
Autor(es): dc.creatorDemachkia, Amir Mohidin-
Autor(es): dc.creatorVelho, Helder Callegaro-
Autor(es): dc.creatorValandro, Luiz Felipe-
Autor(es): dc.creatorDimashkieh, Mohiddin Rida-
Autor(es): dc.creatorSamran, Abdulaziz-
Autor(es): dc.creatorTribst, João Paulo Mendes-
Autor(es): dc.creatorde Melo, Renata Marques-
Data de aceite: dc.date.accessioned2025-08-21T19:02:23Z-
Data de disponibilização: dc.date.available2025-08-21T19:02:23Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s00784-023-04895-6-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/248353-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/248353-
Descrição: dc.descriptionObjectives: To evaluate the effect of the remaining tooth structure and different CAD/CAM materials on the fatigue performance and failure mode of endodontically treated premolars restored with endocrowns. Materials and methods: Ninety maxillary premolars were endodontically treated and assigned into 6 groups (n = 15) according to the number of remaining axial walls (four, three, and two) and restorative materials (ultra-translucent zirconia 5Y-PSZ [KATANA UTML] and lithium disilicate [IPS e.max-CAD]). The specimens were subjected to cyclic fatigue loading test (initial load 200 N; 20 Hz). An incremental step load of 100 N per 10,000 cycles was applied until failure. The fatigue failure load (FFL) and number of failure cycles (CFFs) data were statistically analyzed with two-way ANOVA and Kaplan–Meier test (α = 0.05). Failed specimens were examined under a stereomicroscope 25 × and failure modes were determined. Results: FFL and CFF were significantly influenced by restorative material (p < 0.05). 5Y-PSZ endocrowns showed significantly higher FFL when compared with lithium disilicate. The number of remaining walls did not affect the fatigue behavior or failure mode of the specimens. Of the lithium disilicate restorations, 51% had repairable failures, while 95% 5Y-PSZ restorations had non-repairable failures. Conclusions: Zirconia endocrowns showed better FFL than lithium disilicate endocrowns, regardless of the number of remaining axis walls. Lithium disilicate and 5Y-PSZ endocrowns showed FFL higher than the normal masticatory loads. Clinical relevance: Restoring endodontically treated premolars with endocrown could be a promising treatment, regardless of the remaining axial walls. However, precaution should be taken in material selection since it affects the fatigue resistance and failure mode.-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Institute of Science and Technology São Paulo State University (UNESP), Av. Engenheiro Francisco José Longo,777. 12245000, São José Dos Campos-
Descrição: dc.descriptionPost-Graduate Program in Oral Science Faculty of Dentistry Federal University of Santa Maria (UFSM), Rio Grande Do Sul State-
Descrição: dc.descriptionDepartment of Restorative and Prosthetic Dental Sciences College of Dentistry Dar Al-Uloom University-
Descrição: dc.descriptionDepartment of Oral Regenerative Medicine Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Institute of Science and Technology São Paulo State University (UNESP), Av. Engenheiro Francisco José Longo,777. 12245000, São José Dos Campos-
Idioma: dc.languageen-
Relação: dc.relationClinical Oral Investigations-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCAD/CAM-
Palavras-chave: dc.subjectEndocrowns-
Palavras-chave: dc.subjectEndodontic treatment-
Palavras-chave: dc.subjectFatigue failure-
Palavras-chave: dc.subjectLithium disilicate-
Palavras-chave: dc.subjectZirconia-
Título: dc.titleEndocrown restorations in premolars: influence of remaining axial walls of tooth structure and restorative materials on fatigue resistance-
Tipo de arquivo: dc.typelivro digital-
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