A comparative evaluation of properties of zirconia reinforced high impact acrylic resin with that of high impact acrylic resin

The Saudi Journal for Dental Research Pub Date : 2015-07-01 DOI:10.1016/j.sjdr.2015.02.003

Vipul Asopa , S. Suresh , Meenakshi Khandelwal , Vivek Sharma , Shivalika S. Asopa , Laxman Singh Kaira

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引用次数: 100

Abstract

Statement of the problem

Poly methyl methacrylate (PMMA) acrylic resin, although being the most popular denture base material, is associated with poor mechanical properties. It has been documented that acrylic resin can be strengthened with an addition of structural component (filler) added in the acrylic matrix, to form a composite structure.

Objective

To evaluate and compare the transverse strength, impact strength, surface hardness and water sorption of 10% and 20% zirconia (ZrO₂) reinforced high impact acrylic resin with that of high impact acrylic resin (Trevalon HI, Dentsply India).

Materials and methods

There were 30 specimens in each of the four tests, amounting to a total of 120 specimens. Each of the tests had 10 specimens fabricated from high impact acrylic resin (control); 10 specimens fabricated from 10% zirconia (ZrO₂) and 10 specimens fabricated from 20% zirconia (ZrO₂) reinforced high impact acrylic resin. Specimens were subjected to the test of transverse strength in Universal Testing Machine, impact strength in Izod pendulum impact testing machine and surface hardness by Vickers Microhardness tester according to ISO Specification No. 1567. Water sorption was assessed according to ADA Specification No. 12. Data were analyzed by means of a one-way ANOVA and Bonferroni multiple comparison test.

Results

A significant increase in the transverse strength was observed in the reinforced specimens when compared to the control group. Impact strength and surface hardness were found having lesser values compared to the control group. Water sorption was found to increase on the addition of 10% and 20% zirconia (ZrO₂) but the value lied below 0.8 mg/cm² i.e. within the limit of ADA Specification No. 12.

Conclusion

Reinforcement of acrylic resin with zirconia powder affects its physical and mechanical properties significantly.

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对氧化锆增强高冲击丙烯酸树脂与高冲击丙烯酸树脂性能进行了比较评价

问题说明聚甲基丙烯酸甲酯(PMMA)丙烯酸树脂虽然是最流行的义齿基托材料，但其机械性能较差。有文献记载，丙烯酸树脂可以通过在丙烯酸基体中添加结构组分(填料)来增强，形成复合结构。目的评价和比较10%和20%氧化锆(ZrO2)增强高冲击丙烯酸树脂与高冲击丙烯酸树脂(Trevalon HI, Dentsply India)的横向强度、冲击强度、表面硬度和吸水性。材料与方法四次试验各30个试件，共120个试件。每个试验有10个由高冲击丙烯酸树脂制成的试样(对照);10个由10%氧化锆(ZrO2)制成的样品和10个由20%氧化锆(ZrO2)增强的高冲击丙烯酸树脂制成的样品。试样在万能试验机上进行横向强度试验，在摆动式冲击试验机上进行冲击强度试验，在维氏显微硬度计上进行表面硬度试验。吸水率根据ADA规范No. 12进行评估。数据分析采用单因素方差分析和Bonferroni多重比较检验。结果增强后试件的横向强度较对照组有明显提高。与对照组相比，发现冲击强度和表面硬度值较小。在添加10%和20%的氧化锆(ZrO2)时，吸水性增加，但该值低于0.8 mg/cm2，即在ADA规范No. 12的限制范围内。结论氧化锆粉增强丙烯酸树脂对其物理力学性能有明显影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The Saudi Journal for Dental Research

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