biorigid = biorogid (bioresistant, which resist to organism agression)

Femur = femur

see for example
http://www.aap.de/content/e/produkte_und_loesungen/osteosynt...

"Biorigid Nail™ Femur

Competence in femur management

The development of the Biorigid Femur System is based on the idea of an integrated concept for implants and instruments. Building on the basic intramedullary nail, additional modules guarantee application in a wide range of indications. This makes it possible to react to unforeseen and complicated indications during the operation. The system is built on a hierarchy of trays and comes with a standard set of complementary instruments. Their ergonomic design provides the surgeon with the greatest possible operating convenience."

HTH