ZipLine Medical said it added a $5.7 million extension to its $4.3 million Series C round, with new investor China Materialia promising to help the company expand sales in the People’s Republic.

"This Series C extension allows us to further expand our sales and marketing activities to leverage the overwhelming support we are receiving from key opinion leaders among clinicians," ZipLine CEO John Tighe said in prepared remarks.

Campbell, Calif.-based ZipLine says its Zip surgical skin closure device is designed to exert uniform closure forces while minimizing scar-promoting tension along the wound and reducing the chance of infection.

In April, ZipLine announced regulatory approvals to sell the device in Europe, Japan and South Korea.

Existing ZipLine investors include RA Capital Management of Boston, Claremont Creek Ventures of Oakland, Calif., and XSeed Capital of Portola Valley, Calif.