2017 journal article
Antibacterial efficacy and cytotoxicity of low intensity direct current activated silver-titanium implant system prototype
BIOMETALS, 30(1), 113–125.
author keywords: Low intensity direct current; Silver-titanium implant; Orthopaedic application; Antimicrobial efficacy; Cytotoxicity
MeSH headings : Anti-Infective Agents / chemistry; Anti-Infective Agents / pharmacology; Cell Proliferation / drug effects; Ions / chemistry; Methicillin-Resistant Staphylococcus aureus / drug effects; Methicillin-Resistant Staphylococcus aureus / pathogenicity; Silver / chemistry; Silver / pharmacology; Staphylococcal Infections / drug therapy; Staphylococcal Infections / microbiology; Titanium / chemistry; Titanium / pharmacology
TL;DR:
The in vitro antibacterial efficacy and cytotoxicity of a low intensity direct current (LIDC)-activated silver–titanium implant system prototype designed for localized generation and delivery of silver ions at the implantation site showed high antimicrobial efficacy against MRSA, but was also toxic to human cells immediately surrounding the electrodes.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
Silver-based devices activated by electric current are of interest in biomedicine because of their broad-spectrum antimicrobial activity. This study investigates the in vitro antibacterial efficacy and cytotoxicity of a low intensity direct current (LIDC)-activated silver-titanium implant system prototype designed for localized generation and delivery of silver ions at the implantation site. First, the antibacterial efficacy of the system was assessed against methicillin-resistant Staphylococcus aureus (MRSA) over 48 h at current levels of 3 and 6 µA in Mueller-Hinton broth. The cytotoxicity of the system was then evaluated over 48 h in two phases using an in vitro model with in which the activated electrodes were suspended in growth medium in a cell-seeded tissue culture plate. In phase-1, the system was tested on human osteosarcoma (MG-63) cell line and compared to titanium controls. In phase-2, the cytotoxicity characteristics were validated with normal human diploid osteoblast cells. The LIDC-activated system demonstrated high antimicrobial efficacy against MRSA, but was also toxic to human cells immediately surrounding the electrodes. The statistical analysis showed that the cytotoxicity was a result of the presence of silver, and the electric activation did not make it worse.