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Submitted: 26 Mar 2012
Accepted: 05 May 2012
ePublished: 29 Jun 2012
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Avicenna J Dent Res. 2012;4(1): 33-39.
  Abstract View: 1054
  PDF Download: 471

Original Article

Comparison of the Effect of Metallic Nano-particles on the Water Contact Angle of Composite Resin

M Shirinzad 1, Sh Kasraei 2, M Azarsina 3*

1 Assistant Professor, Department of Operative Dentistry, Dental Faculty, Hamadan University of Medical Sciences, Hamadan, Iran
2 Associate Professor, Dental Research Center, Department of Operative Dentistry, Dental Faculty, Hamadan University of Medical Sciences, Hamadan, Iran.
3 Assistant Professor, Department of Operative Dentistry, Dental Faculty, International Branch of Shahid Beheshti University of Medical Sciences, Tehran, Iran.
*Corresponding Author: Corresponding Author: M. Azarsina Address: Assistant Professor, Dept. of Operative Dentistry, Dental Faculty, International Branch of Shahid Beheshti University of Medical Sciences, Jamalzade Street, Tehran, Iran, Email: azarsina2012@yahoo.com

Abstract

Statement of the problem: Addition of metallic nano-particles to composite resins can change their water contact angle.

Purpose: The aim of this study was to evaluate the effect of addition of nano-particles of silver and zinc oxide to composite resins on their water contact angle.

Material and Methods: This in vitro study was performed on 60 composite resin samples. Nanosilver and nano-zinc oxide were added to composite resin at 0.5% and 1% by weight. SEM-EDX analysis was performed to confirm the homogeneity of the nano-particle distribution. Composite resin discs were made in molds measuring 10 mm in diameter and polished with silicon carbide papers. Water contact angle measurements were performed on 4 points on the surface of each sample, and the mean of the points was reported as the water contact angle of the sample. Twoway ANOVA, followed by the Tukey-HSD test and independent t-test with a significance level of 5%, were used for data analysis.

Results: The addition of nano-particles caused a reduction in the contact angle between water and composite resin (P=0.000). The interaction of the type of nano-particle and its concentration on the contact angle was significant (P=0.000). Water contact angle varied depending on the type of nano-particle (P=0.000) and its concentration (P=0.028). 

Conclusion: Addition of silver and zinc-oxide nano-particles to composite resin reduced the water contact angle of composite resin. 

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