<p>In some cases, amalgam is considering the best choice for restoration of teeth; therefore, it is important to perform studies for improving conventional amalgams. An attempt to improve the performance of conventional amalgam by adding NiCrMo nanowires with four weight percents included (0.3, 0.6, 0.9, and 1.2 wt.%) has been achieved, these nanowires were fabricated using anodic aluminum oxide to obtain nanowires with composition of (72.2% Ni, 19.5% Cr, and 8.3 wt.%Mo), which is close to the composition of the known NiCrMo alloy. The manufactured amalgam nanocomposites were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM), where the results indicated the formation of symmetric orthorhombic Ni<sub>40</sub>Cr<sub>18</sub>Mo<sub>42</sub> phase in nanowires NWs. These NWs behave as adsorbent for Hg in amalgam and play an important role to get coherence phases in conventional amalgam and then reduce the release of Hg to human body. Wear rate and compressive strength were tested for the manufactured amalgam composites in addition to investigating the corrosion resistance in artificial saliva at pH 5.4 and 37&#xa0;℃. The decrease in wear rate and the increase in compressive strength suggest the filling of vacancies within amalgam by nanowires and getting more coherency for components in amalgam especially with Hg, which is the main cause for the increase in microhardness. The results of corrosion test revealed the significant increase in corrosion resistance of the manufactured composites compared to conventional amalgam.</p>

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Corrosion Behavior and Mechanical Properties of Conventional Amalgam Reinforced by NiCrMo Nanowires

  • Rana A. Anaee,
  • Ahmed R. Hassan,
  • Shaimaa A. Naser,
  • Sinan S. Hamdi,
  • Mays A. Anaee,
  • Tamara A. Anai

摘要

In some cases, amalgam is considering the best choice for restoration of teeth; therefore, it is important to perform studies for improving conventional amalgams. An attempt to improve the performance of conventional amalgam by adding NiCrMo nanowires with four weight percents included (0.3, 0.6, 0.9, and 1.2 wt.%) has been achieved, these nanowires were fabricated using anodic aluminum oxide to obtain nanowires with composition of (72.2% Ni, 19.5% Cr, and 8.3 wt.%Mo), which is close to the composition of the known NiCrMo alloy. The manufactured amalgam nanocomposites were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM), where the results indicated the formation of symmetric orthorhombic Ni40Cr18Mo42 phase in nanowires NWs. These NWs behave as adsorbent for Hg in amalgam and play an important role to get coherence phases in conventional amalgam and then reduce the release of Hg to human body. Wear rate and compressive strength were tested for the manufactured amalgam composites in addition to investigating the corrosion resistance in artificial saliva at pH 5.4 and 37 ℃. The decrease in wear rate and the increase in compressive strength suggest the filling of vacancies within amalgam by nanowires and getting more coherency for components in amalgam especially with Hg, which is the main cause for the increase in microhardness. The results of corrosion test revealed the significant increase in corrosion resistance of the manufactured composites compared to conventional amalgam.