Collagen sponge

USRE48536E1 · kind E1 · reissue

Assignee

• GEISTLICH PHARMA AG · CH

Inventors

• Cornel Imhof · Luzern, CH
• Lothar Schloesser · Darmstadt, DE
• Niklaus STIEFEL · Luzern, CH
• Martin Wüest · Chur, CH

Key dates

• Filing date: Mar 26, 2019
• Grant date: Apr 27, 2021
• Expiry date: Mar 26, 2039

Classification

• Technology area (CPC —): General

Abstract

A resilient resorbable chemically crosslinked collagen sponge for promoting soft tissue volume augmentation in the oral region, comprising 60-96% (w/w) collagen and 4-40% (w/w) elastin, which shows by mercury intrusion porosimetry interconnected pores with a median pore diameter between 50 and 90 μm and at least 80% porosity with a pore diameter more than 10 μm, an onset temperature of 45 to 57° C. and a density in dry state from 50 to 65 mg/cm3. A process for preparing a resilient resorbable chemically crosslinked collagen sponge. A method of using a resilient resorbable chemically crosslinked collagen sponge as an implant in the oral cavity for soft tissue volume augmentation.