Effect of Electron Beam Irradiation or Flexural Strength of two Nanocomposites-an In vitro Study.
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Date
2014-10-01
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Abstract
Aim: The aim of this study is to investigate whether dental nanocomposite Filtek Z350
XT and Ceram X-duo can benefit from electron beam irradiation in order to achieve
increased flexural strength
Place and Duration of Study: Department of Conservative Dentistry and Endodontics,
A. B. Shetty Memorial Institute of Dental Sciences, Nitte University, Deralakatte,
Mangalore, India and Microtron Centre; Department of Physics Mangalore University;
Mangalore, India between May 2011 to March 2014. Materials and Methods: Materials were prepared on rectangular bar shaped specimens
of 25-×2-×2-mm according to ISO standard -4049. Electron beam irradiation dose
selected for the study were 1KGy, 3KGy and 5KGy. In total, 48 specimens were
fabricated and divided into 4 groups based on radiation dose group I (non-radiated),
group II (1KGy), group III (3KGy), group IV (5KGy) with 12 specimens in each. After 24
hours, specimens were subjected to 3-point bend test on a universal uniaxial servo
mechanical testing machine.
Statistical Analysis: Performed using one way ANOVA and inter group comparisons
were done using tukeys multiple comparision. ‘P’ value<0.05 was considered statistically
significant.
Results: Flexural strength of Filtex Z350 XT before radiation was170.89±9.07.Flexural
strength of Filtex Z350 XT after irradiation with 1KGy, 3KGy and 5KGy was found to be
269.06±94.91, 326.53±54.74 and 377.64±74.5 respectively. P value statistically
significant (P<0.0001). Flexural strength of Ceram X duo before radiation
was120.14±7.12.Flexural strength of Ceram X duo after irradiation with 1KGy, 3KGy and
5KGy was found to be 206.27±76.38, 177.31±67.35 and 229.33±59.15 respectively. P
value statistically significant (P<0.0001).
Conclusion: It can be concluded that electron beam irradiation can be used as a tool to
modify the present day dental materials for enhancing their mechanical properties.
Description
Keywords
Electron beam irradiation, flexural strength, nanocomposite, filtex, Ceram X-duo, Dental composites, polymerization, cross linking
Citation
Hegde Mithra N, Shetty Shilpa S, Hegde Nidarsh D, Kumari Suchetha, Sanjeev Ganesh, Patodiya Amit. Effect of Electron Beam Irradiation or Flexural Strength of two Nanocomposites-an In vitro Study. British Journal of Medicine and Medical Research. 2014 Oct; 4(28): 4654-4664.