Effects of DLP printing orientation and postprocessing regimes on the properties of 3D printed denture bases

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Autor(es): dc.contributorMcGill University-
Autor(es): dc.contributorMansoura University-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorJafarpour, Dana-
Autor(es): dc.creatorEl-Amier, Nesma-
Autor(es): dc.creatorTahboub, Kawkab-
Autor(es): dc.creatorZimmermann, Elizabeth-
Autor(es): dc.creatorPero, Ana Carolina-
Autor(es): dc.creatorde Souza, Raphael-
Data de aceite: dc.date.accessioned2025-08-21T21:49:28Z-
Data de disponibilização: dc.date.available2025-08-21T21:49:28Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.prosdent.2025.02.035-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/298664-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/298664-
Descrição: dc.descriptionStatement of problem: The variety of recommended postprocessing techniques and printing parameters makes it challenging to determine the best approach to 3-dimensionally (3D) printed dentures. Purpose: The purpose of this in vitro study was to assess the effect of printing orientations (0, 45, and 90 degrees) and postprocessing treatments (ultraviolet [UV], heat, or combination) on the mechanical and surface properties of 3D printed denture base resin. Material and methods: Three-dimensionally printed denture base resin specimens were fabricated at 0-, 45-, and 90-degree printing orientations, followed by 4 postprocessing techniques (UV, Heat, UV+Heat, and control). Microhardness was assessed using a Vickers microhardness tester. Additionally, the flexural strength (FS) and modulus of elasticity (MoE) were analyzed using a 3-point bend test. Wettability was measured according to the sessile drop test. The fractured surfaces were observed under scanning electron microscopy (SEM). Results: FS was significantly greater (P<.001) at a print orientation of 90 degrees (73.7 MPa) compared with 0 and 45 degrees (55.2 and 61.8 MPa). No significant difference in FS was found among postprocessing treatments (all complied with the International Organization for Standardization [ISO] requirements). The UV group had the highest MoE (up to 2061 MPa), followed by the heat-treated groups (up to 1412 MPa). The 45-degree print orientation showed the highest contact angle (CA) in almost all groups (CA=117.6±11.7), and UV led to higher hydrophilicity (CA=33.9±12.0). The effect of build orientation on the microhardness depended on the postprocessing technique with the highest value (23.4 ±1.3) achieved by UV postprocessing in combination with the 90-degree orientation. Conclusions: The optimal FS of 3D printed denture base resin is achieved when it is printed in a vertical orientation (90 degrees relative to the platform base). Thermal annealing as a postprocessing technique combined with UV can effectively enhance FS, induce favorable wettability, and reduce stiffness.-
Descrição: dc.descriptionPhD Candidate Faculty of Dental Medicine and Oral Health Sciences McGill University-
Descrição: dc.descriptionPhD Candidate Faculty of Dental Medicine and Oral Health Sciences McGill University Montreal Quebec Canada; and Assistant Lecturer Prosthodontics Faculty of Dentistry Mansoura University-
Descrição: dc.descriptionFaculty of Dental Medicine and Oral Health Sciences McGill University-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Araraquara Dental School São Paulo State University (UNESP)-
Descrição: dc.descriptionFaculty of Dental Medicine Université Laval Quebec Quebec Canada; and Adjunct Professor Faculty of Dental Medicine and Oral Health Sciences McGill University-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Araraquara Dental School São Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationJournal of Prosthetic Dentistry-
???dc.source???: dc.sourceScopus-
Título: dc.titleEffects of DLP printing orientation and postprocessing regimes on the properties of 3D printed denture bases-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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