口腔医学研究

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (10): 978-980.

• 基础研究论著 • 上一篇    下一篇

改性纳米氧化铈对义齿树脂基托机械性能的影响

初明慧,高士军*,魏思怡,任国欣,王冬霞,肖媛媛   

  1. 佳木斯大学附属第二医院口腔医院修复二科 黑龙江 佳木斯 154002
  • 收稿日期:2015-03-30 出版日期:2015-10-28 发布日期:2016-05-04
  • 通讯作者: 高士军,E-mail:995214081@qq.com
  • 作者简介:初明慧(1989~ ),女,硕士在读,主要从事口腔修复学科的临床及基础研究工作。
  • 基金资助:
    佳木斯大学研究生科技创新项目(编号:LM2015_066)

Effect of Modified Cerium Oxide Nanoparticles on Mechanical Properties of Denture Resin Base

CHU Ming-hui, GAO Shi-jun, WEI Si-yi, REN Guo-xin, WANG Dong-xia, XIAO Yuan-yuan   

  1. The Second Department of Prosthodontics, the Second Affiliated Stomatology Hospital, Jiamusi University, Jiamusi 154002, China
  • Received:2015-03-30 Online:2015-10-28 Published:2016-05-04

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摘要： 目的:研究经硬脂酸改性后的纳米CeO2对义齿树脂基托机械性能的影响。方法:将改性纳米颗粒按照质量比分别为1%、2%、3%、4%和5%的添加量添加到义齿基托材料(PMMA)的单体中,制成不同浓度的纳米齿复合材料,制成标准试件。对每组试件冲击强度,弯曲强度等指标进行检测,并与未添加纳米颗粒组比较,将最终数据进行统计分析。结果:经硬脂酸改性后的纳米氧化铈能够提高树脂基托的机械性能,所测试指标都呈现先增大后减小的趋势。其中添加比例为3%时纳米复合材料的综合性能达到最佳状态,其冲击强度、弯曲强度和弯曲模量分别为(4.186±0.149) J/cm2、(88.865±2.345) MPa和(1.539±0.096) GPa(P<0.05)。结论:在义齿基托材料单体中加入不同浓度的纳米氧化铈颗粒可以提高传统义齿基托的冲击强度,弯曲强度等机械性能,从而可以获得品质优良的纳米义齿复合材料。

关键词: 纳米颗粒, 聚甲基丙烯酸甲酯, 表面改性, 树脂基托, 机械性能

Abstract: Objective: To investigate the effect of nano-CeO2 modified by stearic acid on mechanical properties of denture resin base. Methods: Modified nanoparticles were added in the monomer of denture base materials (PMMA) at the ratios of 0%, 1%, 2%, 3%, 4% and 5% (m:m). Standard specimens were prepared. Impact strength and bending strength were detected in each group. Results: The addition of modified nano-CeO2 improved the mechanical properties of resin denture base. The best combination property was obtained at the ratio of 3%. The impact strength, flexural strength and flexural modulus were (4.186 ± 0.149) J/cm2, (88.865 ± 2.345) MPa, and (1.539 ± 0.096 ) GPa, respectively (P<0.05). Conclusion: The addition of modified nano-CeO2 can improve the mechanical properties of denture resin base.

Key words: Polymethyl methacrylate, Nanoparticles, Denture resin base, Mechanical properties

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