传统型、大块充填型和生物活性树脂基复合材料的物理机械性能评估及填料颗粒表征

Evaluation of physico-mechanical properties and filler particles characterization of conventional, bulk-fill, and bioactive resin-based composites.

作者信息

Gomes de Araújo-Neto Vitaliano, Sebold Maicon, Fernandes de Castro Eduardo, Feitosa Victor Pinheiro, Giannini Marcelo

机构信息

Department of Restorative Dentistry, Dental Materials Division, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Bairro Areião, Piracicaba, SP, Brazil.

Department of Restorative Dentistry, Operative Dentistry Division, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Bairro Areião, Piracicaba, SP, Brazil.

出版信息

J Mech Behav Biomed Mater. 2021 Mar;115:104288. doi: 10.1016/j.jmbbm.2020.104288. Epub 2020 Dec 27.

DOI:10.1016/j.jmbbm.2020.104288

PMID:33383377

Abstract

OBJECTIVE

This study evaluated physical and mechanical properties and characterized the filler particles of seven composites.

MATERIALS AND METHODS

Filtek Supreme (FS, 3M Oral Care), Forma (FO, Ultradent), Charisma Diamond (CD, Kulzer), Spectra Smart (SS, Dentsply), Filtek Bulk Fill (FB, 3M Oral Care), Tetric N-Ceram Bulk Fill (TB, Ivoclar), and Cention N (Ivoclar) in self- (CNSC) or dual-curing (CNDC) were evaluated. Fillers size, shape, and content were analyzed by scanning electron microscopy (SEM) and X-ray dispersive energy spectroscopy (EDX). Disk-shaped specimens (n = 5) were prepared for sorption (SP) and solubility (SL). Flexural strength and elastic modulus were tested at 24 h and 12 months (n = 10). Degree of conversion (DC%) and maximum rate of polymerization (Rp) were evaluated using micro-Raman spectroscopy. SP and SL results were submitted to Kruskal-Wallis one-way ANOVA and Dunn's pairwise test (α = 0.05). Mechanical properties were analyzed by 2-way ANOVA and Tukey's test (α = 0.05). DC% of CNSC and CNDC was compared by independent t-test (α = 0.05). Rp results were analyzed by 1-way ANOVA and Tukey's test (α = 0.05).

RESULTS

The composites differed regarding filler size, shape, and content. CD and CNSC showed lower SP than FS. SS had lower SL than CNSC and CNDC. CNDC presented higher DC% than CNSC. CD, TB, and CNDC showed the highest Rp. TB, CNSC, and CNDC showed the lowest 24-h flexural strengths. Mechanical properties of CD did not decrease, while FO, TB, and CNSC showed a significant reduction after storage.

CONCLUSIONS

Monomer composition and fillers characteristics greatly influenced the physico-mechanical properties of the tested composites.

摘要

目的

本研究评估了七种复合材料的物理和机械性能，并对其填料颗粒进行了表征。

材料与方法

评估了自固化（CNSC）或双固化（CNDC）的Filtek Supreme（FS，3M口腔护理）、Forma（FO，Ultradent）、Charisma Diamond（CD，Kulzer）、Spectra Smart（SS，登士柏）、Filtek Bulk Fill（FB，3M口腔护理）、Tetric N-Ceram Bulk Fill（TB，义获嘉）和Cention N（义获嘉）。通过扫描电子显微镜（SEM）和X射线色散能谱（EDX）分析填料的尺寸、形状和含量。制备圆盘状试样（n = 5）用于吸附（SP）和溶解度（SL）测试。在24小时和12个月时测试弯曲强度和弹性模量（n = 10）。使用显微拉曼光谱评估转化率（DC%）和最大聚合速率（Rp）。SP和SL结果采用Kruskal-Wallis单向方差分析和Dunn成对检验（α = 0.05）。机械性能通过双向方差分析和Tukey检验（α = 0.05）进行分析。CNSC和CNDC的DC%通过独立t检验进行比较（α = 0.05）。Rp结果采用单向方差分析和Tukey检验（α = 0.05）进行分析。