Bacteriostatic and anti-collagenolytic dental materials through the incorporation of polyacrylic acid modified CuI nanoparticles

US9034354B2 · kind B2 · utility

Assignees

• MUSC Foundation for Research Development · US
• Clemson University · US

Inventors

• Walter Renne · Charleston, US
• Anthony S. Mennito · Flemington, US
• Michael Schmidt · Oestrich-Winkel, DE
• Jompobe Vuthiganon · Charleston, US
• George Chumanov · Clemson, US

Key dates

• Filing date: May 23, 2013
• Grant date: May 19, 2015
• Expiry date: May 23, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S977/773
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Provided are antibacterial and antimicrobial surface coatings and dental materials by utilizing the antimicrobial properties of copper chalcogenide and/or copper halide (CuQ, where Q=chalcogens including oxygen, or halogens, or nothing). An antimicrobial barrier is created by incorporation of CuQ nanoparticles of an appropriate size and at a concentration necessary and sufficient to create a unique bioelectrical environment. The unique bioelectrical environment results in biocidal effectiveness through a multi-factorial mechanism comprising a combination of the intrinsic quantum flux of copper (Cu0, Cu1+, Cu2+) ions and the high surface-to-volume electron sink facilitated by the nanoparticle. The result is the constant quantum flux of copper which manifests and establishes the antimicrobial environment preventing or inhibiting the growth of bacteria. The presence of CuQ results in inhibiting or delaying bacterial destruction and endogenous enzymatic breakdown of the zone of resin inter-diffusion, the integrity of which is essential for dental restoration longevity.