Effects of sintering additives and sintering methods on the mechanical, antimicrobial and optical properties of Si<sub>3</sub>N<sub>4</sub> bioceramics.
biomechanical · Level V
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- Record sourced from PubMed, PMID 38552335.
- Also identified by DOI 10.1016/j.jmbbm.2024.106529.
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Abstract
Si<sub>3</sub>N<sub>4</sub> bioceramics were fabricated using GPS and SPS method with MgO-RE<sub>2</sub>O<sub>3</sub> (RE = La, Nd, Gd, Ho and Lu) sintering additives. The effect of sintering methods and sintering additives on the grain growth, mechanical, antimicrobial properties and color of Si<sub>3</sub>N<sub>4</sub> bioceramics were studied. Samples sintered with GPS are composed of β-Si<sub>3</sub>N<sub>4</sub> and samples sintered with SPS are composed of α-Si<sub>3</sub>N<sub>4</sub> and β-Si<sub>3</sub>N<sub>4</sub>. The growth of β-Si<sub>3</sub>N<sub>4</sub> grains in samples sintered with GPS are more adequate. Samples sintered with GPS exhibit a S. aureus inactivation rate up to 98% and a bright color appearance with a hardness of about 13 GPa and a fracture toughness up to 7.5 MPa m<sup>1/2</sup>, suitable for dental implants. And samples sintered with SPS exhibit a hardness of about 17 GPa and a fracture toughness about 6 MPa m<sup>1/2</sup>.
Medical subject headings
- Staphylococcus aureus
- Anti-Infective Agents