Biaxial flexural strength of nanoglass and multiwalled carbon nanotubes reinforced 3D-printed denture base resins and their shear bond strength to 3D-printed and acrylic denture teeth.

Autor: Ibrahim YM; Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt., Mohamed PA; Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt., Hanno KI; Department of Prosthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt., Abdul-Monem MM; Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt; Division of Dental Biomaterials, Department of Prosthodontics, Faculty of Dentistry, Alamein International University, Alamein, Egypt. Electronic address: mohamed.mahmoud@dent.alex.edu.eg.
Jazyk: angličtina
Zdroj: Dental materials : official publication of the Academy of Dental Materials [Dent Mater] 2024 Oct; Vol. 40 (10), pp. 1557-1567. Date of Electronic Publication: 2024 Jul 29.
DOI: 10.1016/j.dental.2024.07.026
Abstrakt: Objective: Evaluation of biaxial flexural strength (BFS) of nanoglass (NG) and multiwalled carbon nanotubes (MWCNTs) reinforced 3D-printed denture base resins and their shear bond strength (SBS) to 3D-printed and acrylic denture teeth.
Methods: Silanized NG and MWCNTs were added to 3D-printed denture base resin to obtain four groups: Control, 0.25 wt% NG, 0.25 wt% MWCNTs, and a combination group with 0.25 wt% of both fillers. All specimens were tested before and after 600 cycles of thermal aging. BFS (n = 88) was tested using disk-shaped specimens (12 ×2 mm) centralized on an O ring in a universal testing machine. Weibull analysis was conducted to assess predictability of failure. SBS (n = 176) was tested for acrylic and 3D-printed denture teeth attached to bar-shaped specimens in a universal testing machine followed by failure mode analysis using stereomicroscope. Two and three-way ANOVA tests followed by Tukey post hoc test were conducted for BFS and SBS. Kruskal-Wallis test compared percent change among groups with subsequent Dunn post hoc test with Bonferroni correction (α = 0.05).
Results: BFS was affected significantly by filler content (P < 0.001) and thermal cycling (P < 0.001), with thermal cycling displaying the uppermost effect (Ƞp 2 =0.551). A significant interaction between filler content, thermal cycling, and teeth type was displayed by SBS results (P < 0.001, F=10.340, Ƞp 2 =0.162). The highest BFS values belonged to 0.25 % MWCNTs while the highest SBS to printed teeth was displayed by the combination.
Significance: The combination group displayed higher BFS and SBS to printed teeth compared to control which allows 3D-printed materials to have a long-term clinical success.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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