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Evaluating a Novel 3D-Printed Resin for Dental Restorations: Fracture Resistance of Restorations Fabricated by Digital Press Stereolithography

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Pubblicato in:Polymers vol. 17, no. 17 (2025), p. 2322-2335
Autore principale: Abad-Coronel Cristian
Altri autori: Freire Bonilla Cinthya, Vidal Sebastián, Rosero Fabián, Encalada Abad Carolina, Mena Córdova Nancy, Paltán, César A, Fajardo, Jorge I, Aliaga Paulina
Pubblicazione:
MDPI AG
Soggetti:
United States > US
Mechanical properties
Polymers
Fracture surfaces
Lithium
Resins
CAD/CAM
Computer aided design > CAD
Ceramics
Fracture toughness
Manufacturers
Fracture testing
Dentistry
Three dimensional printing
Automation
Aesthetics
Additive manufacturing
Lithography
Thermal cycling
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Abstract:An in vitro study evaluated the fracture resistance of four CAD/CAM restorative materials: lithium disilicate ceramic (IPS e.max CAD, EM), hybrid ceramic (Vita Enamic, VE), a polymer-based composite (Cerasmart, CS), and a novel 3D-printed resin (Ceramic Crown, CC) fabricated using digital press stereolithography (DPS) technology. Standardized full-coverage crowns were designed and manufactured for each material. All specimens underwent thermocycling and fracture testing using a universal testing machine. EM exhibited the highest fracture resistance (mean: 440.49 N), while VE showed the lowest (173.82 N). CS (265.49 N) and CC (306.76 N) presented intermediate values without statistically significant differences between them. Stereomicroscopic analysis revealed differences in fracture patterns, with IPS e.max CAD showing smooth, brittle fractures, while hybrid and polymer-based materials exhibited tortuous fracture surfaces. These results suggest that DPS technology achieves mechanical performance for Ceramic Crown comparable to that of milled polymer-based composites, while offering production advantages in terms of time efficiency. As one of the first studies to evaluate Ceramic Crown and DPS technology, these findings provide initial insights into their mechanical behavior. However, further studies are required to validate their clinical performance before widespread use can be recommended.
ISSN:2073-4360
DOI:10.3390/polym17172322
Fonte:Materials Science Database