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An in Vitro Evaluation of Novel Nha/Zircon Plasma Coating on 316L Stainless Steel Dental Implant Publisher



Karamian E1 ; Kalantar Motamedi MR2 ; Khandan A3 ; Soltani P2 ; Maghsoudi S2
Authors
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Authors Affiliations
  1. 1. Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran
  2. 2. Dental Students Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Young Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran

Source: Progress in Natural Science: Materials International Published:2014


Abstract

The surface characteristics of an implant that influence the speed and strength of osseointegration include crystal structure and bioactivity. The aim of this study was to evaluate the bioactivity of a novel natural hydroxyapatite/zircon (NHA/zircon) nanobiocomposite coating on 316L stainless steel (SS) dental implants soaking in simulated body fluid. A novel NHA/zircon nanobiocomposite was fabricated with 0 (control), 5, 10, and 15wt% of zircon in NHA using ball mill for 1h. The composite mixture was coated on SS implants using a plasma spray method. Scanning electron microscopy (SEM) was used to evaluate surface morphology, and X-ray diffraction (XRD) was used to analyze phase composition and crystallinity (Xc). Further, calcium ion release was measured to evaluate the coated nanobiocomposite samples. The prepared NHA/zircon coating had a nanoscale morphological structure with a mean crystallite size of 30-40nm in diameter and a bone-like composition, which is similar to that of the biological apatite of a bone. For the prepared NHA powder, high bioactivity was observed owing to the formation of apatite crystals on its surface. Both minimum crystallinity (Xc=41.1%) and maximum bioactivity occurred in the sample containing 10wt% of zircon because of minimum Xc and maximum biodegradation of the coating sample. © 2014 Chinese Materials Research Society.
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