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Characteristics improvement of calcium hydroxide dental cement by hydroxyapatite nanoparticles. Part 1: Formulation and microstructure
Author(s) -
Yasaei Mana,
Zamanian Ali,
Moztarzadeh Fathollah,
Ghaffari Maryam,
Mozafari Masoud
Publication year - 2013
Publication title -
biotechnology and applied biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 70
eISSN - 1470-8744
pISSN - 0885-4513
DOI - 10.1002/bab.1119
Subject(s) - microstructure , calcium hydroxide , nanoparticle , materials science , scanning electron microscope , chemical engineering , cement , mineralization (soil science) , calcium , hydroxide , composite material , chemistry , nanotechnology , metallurgy , organic chemistry , engineering , nitrogen
Calcium hydroxide cement ( CHC ), which is a direct pulp‐capping material, has been widely used for several decades. In spite of the well‐known advantages of CHC s, they have some disadvantages as well, such as high solubility, no inherent adhesive qualities, and low mechanical strength. Previous studies were undertaken to improve these deficiencies by implementing changes to modify the conventional CHC s. The aim of the present research is to demonstrate the potential rectification of the aforementioned deficiencies of the commercially available CHC s by adding hydroxyapatite ( HA ) nanoparticles without lessening their advantages. Here, the synthesized HA nanoparticles were added into the CHC s in two different portions of 3 and 7 wt%. A scanning electron microscope was used to observe and analyze the microstructure, and X ‐ray energy dispersive analysis was used to analyze the elemental composition of the new CHC s. In addition, setting time, mechanical strength, p H , calcium ( C a) release, and antibacterial behavior were measured to assess how HA nanoparticles influence the characteristics of CHC s. The results showed that adding 3 wt% HA nanoparticles can optimally improve the mechanical strength of the cement and increase the C a release rate as a mineralization promoter without reducing the antibacterial behavior.