当前位置: X-MOL 学术J. Prosthet. Dent. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Flexural strength of CAD-CAM and conventional interim resin materials with a surface sealant
The Journal of Prosthetic Dentistry ( IF 4.6 ) Pub Date : 2020-10-03 , DOI: 10.1016/j.prosdent.2020.09.004
Gülce Çakmak , Hakan Yilmaz , Özge Aydoğ , Burak Yilmaz

Statement of problem

The flexural strength of computer-aided design and computer-aided manufacturing (CAD-CAM) and conventional interim resin materials when they are used with a surface sealant is unclear.

Purpose

The purpose of this in vitro study was to evaluate the flexural strength of different CAD-CAM polymethyl methacrylate (PMMA)-based polymers and conventional interim resin materials, autopolymerized bisacrylate composite resin and polyethyl methacrylate (PEMA) with and without a surface sealant after thermocycling.

Material and methods

Fourteen rectangular-shaped specimens (25×2×2 mm) were fabricated from 5 different interim resin materials, 3 different CAD-CAM PMMA-based polymers: Polident-PMMA, Telio CAD, M-PM-Disc; 2 different conventional interim resin materials, and 1 autopolymerized bisacrylate composite resin: Acyrtemp and 1 PEMA resin: Bosworth Trim according to ISO 10477:2018. Two different types of surface treatments (n=7), conventional polishing and surface sealant application, were applied to 1 surface of the specimens. Ten thousand thermocycles were applied in distilled water for all specimens (5 °C and 55 °C). A 3-point bend test was used to measure the flexural strength of specimens in a universal testing device at a 1 mm/min crosshead speed. The flexural strength data (σ) were calculated in megapascals (MPa) and analyzed by using a 2-way ANOVA. Post hoc pairwise comparisons and independent t test analysis were done (α=.05).

Results

According to the 2-way ANOVA, material type (P<.001) significantly affected the flexural strength. Surface treatment type (P=.818) had no significant effect on flexural strength, and no significant interaction was found between material type and surface treatment type (P=.111). CAD-CAM PMMA-based polymers had significantly higher flexural strength than the conventional interim resin materials. However, no significant difference was found within groups of the same type. Also, no significant difference was found in flexural strength values between the conventional polishing and surface sealant groups within each interim resin material (P≥.162).

Conclusions

The flexural strength of CAD-CAM PMMA-based polymers was higher than the flexural strength of conventional bisacrylate composite resin and PEMA interim resin materials after thermocycling. The surface treatment type (conventional polishing and surface sealant application) was not found to affect the flexural strength of CAD-CAM PMMA-based polymers, conventional bisacrylate composite resin, or PEMA interim resin materials.



中文翻译:

具有表面密封剂的CAD-CAM和常规中间树脂材料的抗弯强度

问题陈述

与表面密封剂一起使用时,计算机辅助设计和计算机辅助制造(CAD-CAM)以及常规中间树脂材料的抗弯强度尚不清楚。

目的

这项体外研究的目的是评估热循环后不同CAD-CAM聚甲基丙烯酸甲酯(PMMA)基聚合物和常规中间树脂材料,自聚合双丙烯酸酯复合树脂和聚甲基丙烯酸乙酯(PEMA)在有无表面密封剂的情况下的抗弯强度。

材料与方法

用5种不同的中间树脂材料,3种不同的基于CAD-CAM PMMA的聚合物制成了14个矩形样本(25×2×2 mm):Polident-PMMA,Telio CAD,M-PM-Disc;根据ISO 10477:2018,有2种不同的常规中间树脂材料和1种自动聚合的双丙烯酸酯复合树脂:Acyrtemp和1种PEMA树脂:Bosworth Trim。将两种不同类型的表面处理(n = 7),即常规抛光和表面密封剂施加,应用于样品的1个表面。对所有样品(5°C和55°C)在蒸馏水中施加一万个热循环仪。在通用测试设备中以3 mm / min的十字头速度使用三点弯曲测试来测量样品的抗弯强度。弯曲强度数据(σ)以兆帕(MPa)计算,并使用2向ANOVA分析。进行t检验分析(α= .05)。

结果

根据2通方差分析,材料类型(P <.001)显着影响抗弯强度。表面处理类型(P = .818)对弯曲强度没有显着影响,并且材料类型和表面处理类型之间没有发现显着的相互作用(P = .111)。基于CAD-CAM PMMA的聚合物比常规的中间树脂材料具有更高的弯曲强度。但是,在相同类型的组中没有发现显着差异。此外,没有显著差异在常规的抛光和表面密封组之间的每个临时树脂材料内的弯曲强度的值(发现P ≥.162)。

结论

热循环后,CAD-CAM PMMA基聚合物的抗弯强度高于传统的双丙烯酸酯复合树脂和PEMA中间树脂材料的抗弯强度。未发现表面处理类型(常规抛光和表面密封剂的应用)会影响CAD-CAM PMMA基聚合物,常规双丙烯酸酯复合树脂或PEMA过渡树脂材料的弯曲强度。

更新日期:2020-12-03
down
wechat
bug