Paper Information

Journal:   IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)   DECEMBER 2010-JANUARY 2011 , Volume 23 , Number 5 (ISSUE NO.109); Page(s) 423 To 433.
 
Paper: 

PROPERTIES OF DENTAL ADHESIVES INCORPORATED WITH BOEHMITE NANO-PARTICLES

 
 
Author(s):  ABKHEZR A., ATAI M.*, BEHNAMGHADER A.A., SOLHI L., EBADZADEH T.
 
* FACULTY OF MEDICAL ENGINEERING, SCIENCE AND RESEARCH BRANCH, ISLAMIC AZAD UNIVERSITY, TEHRAN, IRAN
 
Abstract: 
The incorporation of boehmite nano-particles and its effects on the mechanical properties and bond strength of an experimental dental adhesive were studied.
An adhesive solution containing ethanol, Bis-GMA, TMPTMA, HEMA and photo-initiator system (camphorquinone and DMAEMA) was prepared. Silanized boehmite nano-particles were incorporated into the adhesive in different concentrations of 0, 0.2, 0.5, 1, 2, and 5 weight percentages. The suspensions were ultrasonocated to facilitate the nano-particle dispersion. Degree of conversion of the adhesive under visible light irradiation was determined using FT-IR spectroscopy. Depth of cure, diametral tensile strength, flexural strength, and micro-shear bond strength of the adhesives were measured. Scanning electron electron microscopy was utilized to observe the fracture surface topography. The results were compared using one-way ANOVAand Tukey posthoc test at the significance level of 0.05. The results indicated that the diametral tensile strength, flexural strength, and micro-shear bond strength increased at nano-particle contents of 0.2-0.5 wt.% and beyond this range there was a declining trend (p<0.05) observed in all these properties because of the nano-particle agglomeration. No significant difference was observed in flexural moduli of the adhesives with different filler contents. The study revealed that the incorporation of boehmite nanoparticles may improve the properties of dental adhesives.
 
Keyword(s): DENTAL ADHESIVE, NANO-PARTICLE, BOEHMITE, MECHANICAL PROPERTIES, MICRO-SHEAR BOND STRENGTH
 
References: 
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