Effects of DLP printing orientation and postprocessing regimes on the properties of 3D printed denture bases
Rattachement africain : ca, Égypte, br. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
STATEMENT 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.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Effects of DLP printing orientation and postprocessing regimes on the properties of 3D printed denture bases
- Date Crossref
- 01/07/2025
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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McGill University Health Centre pays non établi dans la noticeÉtablissement de santé
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McGill University pays non établi dans la noticeUniversité ou école supérieure
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Mansoura University Mansoura University, Égypte (code pays fourni par la source)Université ou école supérieure
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Centro Universitário de Araraquara pays non établi dans la noticeUniversité ou école supérieure
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Universidade Estadual Paulista (Unesp) pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Dental Medicine and Oral Health Sciences PhD Candidate Mansoura University, Égypte (pays nommé en fin d’affiliation)Université ou école supérieure
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São Paulo State University (UNESP) Department of Dental Materials and Prosthodontics pays non établi dans la noticeUniversité ou école supérieure
McGill University Health Centre, McGill University et Mansoura University (Mansoura University, Égypte), avec 4 autres affiliations. Pays d’affiliation : Égypte.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.