Mechanical properties of 3D-printed and milled composite resins for definitive restorations : an in vitro comparison of initial strength and fatigue behavior

Prause, Elisabeth (avtor), Malgaj, Tine (avtor), Kocjan, Andraž (avtor), Beuer, Florian (avtor), Hey, Jeremias (avtor), Jevnikar, Arne Peter (avtor), Schmidt, Franziska (avtor)

Objective: To evaluate the flexural strength and fatigue behavior of a novel 3D-printed composite resin for definitive restorations. Materials and Methods: Fifty disc-shaped specimens were manufactured from each of a nanohybrid composite resin (NHC), polymer-infiltrated ceramic network (PICN), and 3D-printed composite resin (3D) with CAD-CAM technology. Biaxial flexural strength (σ$_{in}$) (n = 30 per group) and biaxial flexural fatigue strength (σ$_{ff}$) (n = 20 per group) were measured using piston-on-three-balls method, employing a staircase approach of 105 cycles. Weibull statistics, relative-strength degradation calculations, and fractography were performed. The results were analyzed with 1-way ANOVA and Games-Howell post hoc test (α = 0.05). Results: Significant differences in σ$_{in}$ and σ$_{ff}$ among the groups (p < 0.001) were detected. The NHC group provided the highest mean ± standard deviation σ$_{in}$ and σ$_{ff}$ (237.3 ± 31.6 MPa and 141.3 ± 3.8 MPa), followed by the PICN (140.3 ± 12.9 MPa and 73.5 ± 9.9 MPa) and the 3D (83.6 ± 18.5 MPa and 37.4 ± 23.8 MPa) groups. The 3D group exhibited significantly lower Weibull modulus (m = 4.7) and up to 15% higher relative strength degradation with areas of nonhomogeneous microstructure as possible fracture origins. Conclusions: The 3D-printed composite resin exhibited the lowest mechanical properties, where areas of nonhomogeneous microstructure developed during the mixing procedure served as potential fracture origins.

• Jezik: Angleški jezik
• Ključne besede: 3D-printed composite resins, Weibull, additive manufacturing, flexural fatigue strength, flexural strength, milled composite resins, staircase approach
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: MF - Medicinska fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 391–401
• Številčenje: Vol. 36, iss. 2
• PID: 20.500.12556/RUL-154085
• UDK: 616.31
• ISSN pri članku: 1708-8240
• DOI: 10.1111/jerd.13132
• COBISS.SI-ID: 163917571
• Datum objave v RUL: 24.01.2024

Gradivo je del revije

• Naslov: Journal of esthetic and restorative dentistry
• Založnik: Wiley
• ISSN: 1708-8240
• COBISS.SI-ID: 3185684

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: 3D-natisnjene kompozitne smole, aditivna izdelava, upogibna napetost, mlete kompozitne smole

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0087
• Naslov: Keramični in komplementarni materiali za napredne inženirske in biomedicinske aplikacije

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J3-3064
• Naslov: Predklinične in klinične raziskave cirkonijeve oksidne dentalne keramike, izdelane s tehnologijami aditivnega oblikovanja (ZIRAMDENT)