StelKast EXp™
Video:
Steve Kurtz, Ph.D, Corporate Vice President at Exponent, Inc. talks about development of EXp polyethylene.
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Press Release:
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A Better Acetabular Solution from StelKast...Naturally.
McMurray, PA., April 14, 2011 — StelKast is proud to announce the recent FDA 510(k) clearance of their new EXp™ Acetabular Liners. EXp™, a blend of antioxidant and highly cross-linked polyethylene technology was developed with the consulting support of Steven Kurtz, Ph.D. and Exponent, Inc. (Philadelphia, PA). StelKast has also received 510(k) clearance for large diameter cobalt-chrome femoral heads and Biolox® delta femoral heads.
“StelKast is excited to be the first US orthopedic company to provide a highly cross-linked vitamin E blended acetabular system offering superior oxidation resistance. The introduction of EXp™ polyethylene is just another example of StelKast’s commitment to place emerging technology and high quality implants in surgeon’s hands through cost effective solutions.”
Full commercial launch of the EXp™ Acetabular System is planned for July 2011. For inquiries, please contact your local StelKast representative or Customer Service at 888-273-1583.
StelKast specializes in the design, manufacture, and distribution of hip and knee implant systems. The Company’s mission is to provide high-quality, cost effective solutions to meet the challenges of the orthopedic community through clinically proven design concepts and innovative technology. For more information about StelKast, please visit the company website at www.stelkast.com.
Preservation of Mechanical Properties
The Stability and Performance You DemandEXp Polyethylene Technology represents an optimal blend of UHMWPE, the antioxidant vitamin E(α-tocopherol), and cross-linking for long-term oxidative stability, preservation of mechanical properties and performance.
- Unlike other highly cross-linked polyethylenes, EXp requires no thermal processing or infusion of antioxidants to stabilize the material.
- EXp liners experienced no failures as a result of dynamic impingement testing.5
- The vitamin E blended into the EXp does not elude from the material during extraction studies.6
- The morphology of EXp UHMWPE is consistent with conventional UHMWPE - demonstrating no consolidation defects or voids.7
Stability
Oxidatively Stable1EXp UHMWPE is more resistant to oxidation than conventional cross-linked polyethylene
Long-Term Stability2
EXp UHMWPE remains resistant to oxidation after 5 million cycles of wear testing and artificial aging
Performance
Preserved Mechanical Performance3EXp UHMWPE retained its mechanical performance after oxidative aging
Reduced Wear4
EXp liners demonstrated a 30% reduction in wear against a 36mm BIOLOX®delta head compared to a 36mm cobalt-chrome head
References 1 through 7: Data on file at StelKast. Bench testing is not necessarily indicative of clinical performance.
Literature:
EXp Brochure 
Surgical Protocol & Product Specifications