Effect of zirconium oxide and cellulose nanoparticles addition on the flexural strength, impact strength and translucency of heat polymerized acrylic resin: an in vitro study.


Main Article Content

Senbagavalli S Sagadevan K
R Ravichandran
K Harsha Kumar
Vivek V Nair
Janardanan Kavitha
VS Deepthi

Abstract

Background: Polymethyl methacrylate denture base material is considered the most popular denture base material to date. The advantages of the PMMA       include low cost, biocompatibility, ease of processing, stability in the oral environment, and acceptable aesthetics. To improve the acrylic polymer’s properties for removable acrylic appliances, the significant issues to be addressed are its low mechanical properties such as impact, bending, and fatigue.


Aim: This study was aimed to evaluate the effect of incorporating different concentrations of zirconium oxide and cellulose nanoparticles on flexural strength, and impact strength and translucency of heat polymerized acrylic resin.


Materials and methods: A total of 180 acrylic specimens were made and divided into two groups, which comprises 90 specimens in each. Group I and Group II were reinforced with ZrO2 and cellulose nanoparticles, respectively. Each group was divided into three subgroups depending on the properties to be evaluated i.e., flexural strength, Impact strength, and Translucency, respectively. Each subgroup was further divided into three based on the concentrations (1.5 wt%, 2.5 wt% and 5.0 wt%) of the nanoparticles. The flexural strength was determined using a universal testing machine. The Izod impact tester was used to evaluate the impact strength. Translucency measured by UV visible spectrophotometer. The obtained data were analysed using one way ANOVA within the group followed by posthoc comparison by TUKEY’S method for the comparison between groups.


Results: Acrylic specimens incorporated with 2.5 wt% ZrO2 exhibited more mean flexural strength, and the specimens with 2.5 wt% and 5.0 wt% cellulose nanoparticles showed the highest impact strength and translucency, respectively. One-way ANOVA showed significant differences (p=0.000) between the groups.


Conclusion: PMMA incorporated with 2.5 wt% of ZrO2 NPs, 2.5 wt% and 5.0 wt% of cellulose NPs showed superior flexural strength, impact strength, and translucency, respectively.


 

Article Details


How to Cite
Sagadevan K, S. S., Ravichandran, R., Harsha Kumar, K., Nair, V. V. ., Kavitha, J. ., & Deepthi, V. . (2021). Effect of zirconium oxide and cellulose nanoparticles addition on the flexural strength, impact strength and translucency of heat polymerized acrylic resin: an in vitro study. International Journal of Dental Materials, 3(4), 112–119. https://doi.org/10.37983/IJDM.2021.3403
Author Biographies

Senbagavalli S Sagadevan K, Govt. Dental College, Thiruvananthapuram

Junior Resident, Department of Prosthodontics, Government Dental College, Thiruvananthapuram, Kerala, India.

R Ravichandran, Govt. Dental College, Thiruvananthapuram

Professor, Department of Prosthodontics, Govt. Dental College, Thiruvananthapuram, Kerala, India.   

K Harsha Kumar, Govt. Dental College, Thiruvananthapuram

Professor, Department of Prosthodontics, Govt. Dental College, Thiruvananthapuram, kerala, india.

Vivek V Nair, Govt. Dental College, Thiruvananthapuram

Professor , Department of Prosthodontics, Govt. Dental College, Thiruvananthapuram, Kerala, India.

Janardanan Kavitha, Govt. Dental College, Thiruvananthapuram

Assistant Professor, Department of Prosthodontics, Govt. Dental College, Thiruvananthapuram, Kerala, India.

VS Deepthi, Govt. Dental College, Thiruvananthapuram

Assistant Professor, Department of Prosthodontics, Govt. Dental College, Thiruvananthapuram, Kerala, India.

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