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

IF 4.6 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Dental Materials Pub Date : 2024-07-29 DOI:10.1016/j.dental.2024.07.026

Yomna M. Ibrahim , Pansai A. Mohamed , Kenda I. Hanno , Mohamed M. Abdul-Monem

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Abstract

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 (Ƞp² =0.551). A significant interaction between filler content, thermal cycling, and teeth type was displayed by SBS results (P < 0.001, F=10.340, Ƞp² =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.

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纳米玻璃和多壁碳纳米管增强型三维打印义齿基底树脂的双轴抗弯强度及其与三维打印义齿和丙烯酸义齿的剪切粘接强度。

目的：评估纳米玻璃（NG）和多壁碳纳米管（MWCNTs）增强3D打印义齿基底树脂的双轴抗弯强度（BFS）及其与3D打印义齿和丙烯酸义齿的剪切粘结强度（SBS）：将硅烷化 NG 和 MWCNTs 添加到 3D 打印义齿基底树脂中，得到四组：对照组、0.25 wt% NG 组、0.25 wt% MWCNTs 组和含 0.25 wt% 两种填料的组合组。所有试样都在 600 次热老化前后进行了测试。在万能试验机中，使用集中在 O 形环上的圆盘状试样（12 × 2 毫米）对 BFS（n = 88）进行了测试。进行了 Weibull 分析，以评估失效的可预测性。用万能试验机对连接在棒状试样上的丙烯酸义齿和 3D 打印义齿进行 SBS（n = 176）测试，然后用体视显微镜进行失效模式分析。对 BFS 和 SBS 进行了两方和三方方差分析，然后进行 Tukey 后检验。Kruskal-Wallis 检验比较了各组之间的百分比变化，随后进行了 Dunn 后检验，并进行了 Bonferroni 校正（α = 0.05）：结果：BFS 受填料含量的影响很大（P 2 =0.551）。SBS 结果显示，填料含量、热循环和牙型之间存在明显的交互作用（P 2 =0.162）。0.25 % MWCNTs 的 BFS 值最高，而组合组的印齿 SBS 值最高：意义：与对照组相比，组合组打印牙齿的 BFS 和 SBS 值更高，这使得三维打印材料能够获得长期的临床成功。

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.