Ultrapure magnesium alloy with adjustable degradation rate

US10213522B2 · kind B2 · utility

Assignee

• DePuy Synthes Products, Inc. · US

Inventors

• Thomas Imwinkelried · Flurlingen, CH
• Stefan Beck · Reno, US
• Peter Uggowitzer · Ottenbach, CH
• Joerg Loeffler · Greifensee, CH

Key dates

• Filing date: Sep 7, 2016
• Grant date: Feb 26, 2019
• Expiry date: Nov 14, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L2400/12
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An alloy and an implant having a three-dimensional structure based on such alloy. The alloy comprises a monophasic MgZn alloy containing from 2.0 wt. % Zn to 6 wt. % Zn, having less than 0.001 wt. % of one or more other elements with the remainder being Mg. In some embodiments, the alloy is substantially free of microgalvanic elements. In some embodiments, the alloy includes a MgZnCa alloy containing nanosized precipitates being less noble than the Mg matrix alloy and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn and a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, having less than 0.001 wt. % of one or more other elements with the remainder being Mg. In other embodiments, the alloy includes a MgZnCa alloy containing nanosized precipitates being less noble than the Mg matrix alloy, a plurality of nanosized precipitates being more noble than the Mg matrix and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn, a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, having less than 0.001 wt. % of one or more other elements with the remainder being Mg.