Antimicrobial effects of a borate-based bioactive glass wound matrix on wound-relevant pathogens.

Objective: The antimicrobial effects of a borate-based bioactive glass matrix (BBBGM) on clinically relevant microorganisms was investigated for up to seven days in vitro.

Method: A total of 19 wound-relevant pathogens were studied using the in vitro AATCC 100 test method.

Results: The reduction of viable Gram-negative and Gram-positive bacteria and yeasts at days 4 and 7 post-culture on the BBBGM was significant (> 4log) in most cases.

Improving Patient Safety Event Reporting Among Residents and Teaching Faculty.

Background: A June 2012 site visit report from the Accreditation Council for Graduate Medical Education Clinical Learning Environment Review revealed that residents and physicians at TriHealth, Inc., a large, nonprofit independent academic medical center serving the Greater Cincinnati area in Ohio, had an opportunity to improve their awareness and understanding of the hospital's system for reporting patient safety concerns in 3 areas: (1) what constitutes a reportable patient safety event, (2) who is responsible for reporting, and (3) how to use the hospital's current reporting system.

Methods: To improve the culture of patient safety, we designed a quality improvement project with the goal to increase patient safety event reporting among residents and teaching faculty.

Angiogenic effects of borate glass microfibers in a rodent model.

The primary objective of this research was to evaluate the use of bioactive borate-based glass microfibers for angiogenesis in soft tissue repair applications. The effect of these fibers on growth of capillaries and small blood vessels was compared to that of 45S5 silica glass microfibers and sham implant controls. Compressed mats of three types of glass microfibers were implanted subcutaneously in rats and tissues surrounding the implant sites histologically evaluated 2-4 weeks post surgery.

Cytotoxicity assessment of modified bioactive glasses with MLO-A5 osteogenic cells in vitro.

The primary objective of this study was to evaluate in vitro responses of MLO-A5 osteogenic cells to two modifications of the bioactive glass 13-93. The modified glasses, which were designed for use as cell support scaffolds and contained added boron to form the glasses 13-93 B1 and 13-93 B3, were made to accelerate formation of a bioactive hydroxyapatite surface layer and possibly enhance tissue growth. Quantitative MTT cytotoxicity tests revealed no inhibition of growth of MLO-A5 cells incubated with 13-93 glass extracts up to 10 mg/ml, moderate inhibition of growth with 13-93 B1 glass extracts, and noticeable inhibition of growth with 13-93 B3 glass extracts.

In vitro performance of 13-93 bioactive glass fiber and trabecular scaffolds with MLO-A5 osteogenic cells.

This in vitro study was performed to evaluate the ability of two types of porous bioactive glass scaffolds to support the growth and differentiation of an established osteogenic cell line. The two scaffold types tested included 13-93 glass fiber and trabecular-like scaffolds seeded with murine MLO-A5 cells and cultured for intervals of 2 to 12 days. Culture in MTT-containing medium showed metabolically active cells both on the surface and within the interior of the scaffolds.

Bioactive glass in tissue engineering.

This review focuses on recent advances in the development and use of bioactive glass for tissue engineering applications. Despite its inherent brittleness, bioactive glass has several appealing characteristics as a scaffold material for bone tissue engineering. New bioactive glasses based on borate and borosilicate compositions have shown the ability to enhance new bone formation when compared to silicate bioactive glass.