CPG, along with researchers from the Massachusetts General Hospital, has developed several formulations of ultra high molecular weight polyethylene that contain Vitamin E as an antioxidant. These materials are highly crosslinked, which imparts excellent wear characteristics, while the Vitamin E renders the material oxidatively stable, even under aggressive aging conditions. These patented and patent pending formulations are being used for total joint arthroplasty devices, and have application in other areas where wear resistant materials are required.

E-CIMA

E-CIMA is a formulation containing Vitamin E throughout the material. Following blending and consolidation, the sample is subjected to ionizing radiation, which forms crosslinks in the material. The material is then deformed at a temperature below the melting point to quench residual free radicals. An annealing step returns the sample to its original shape, after which it is ready for machining into an implant. E-CIMA has wear properties similar to remelted, highly crosslinked UHMWPE, yet has the improved mechanical properties approaching virgin UHMWPE. Coupled with this is the oxidative resistance of Vitamin E.

This patented material is available for licensing. One licensee, Corin Group, published on E-CIMA properties at the 2011 Orthopedic Research Society meeting.

Surface Crosslinked UHMWPE

The surface crosslinked UHMWPE contains Vitamin E in specific locations, allow targeted crosslinking in regions where wear rates must be control, yet high mechanical properties in regions where locking mechanisms are located. This material has excellent applications for re-surfacing or thin liners in orthopedics, and is available for licensing.

Contact a CPG representative about licensing opportunities by calling (617) 629-4400, or by sending an email to info@campoly.com.