The ankle is one of the most complex joints in the body because it is a rotating joint with many small bones. For years, people who suffered from end-stage ankle arthritis had limited options when it came to surgical treatment.“Total ankle replacements were rarely performed due to their high failure rate and limited range of motion,” says Penn orthopaedic surgeon, Keith Wapner, MD.
Early total ankle replacements were very invasive, and often sacrificed the integrity of the bones and soft tissue structures surrounding the ankle, thus making the joint unstable.
“Because of those reasons,” Dr. Wapner says, “ankle fusion, which joins together bones within the ankle limiting mobility, became the gold standard of care.”
The good news is that today, ankle replacement is a viable alternative to ankle fusion. Penn orthopaedic surgeons use the Scandinavian Total Ankle Replacement (STAR ™ Ankle) for the treatment of end-stage ankle arthritis.
“The STAR Ankle is unique because it’s the only three-piece, mobile-bearing device approved by the U.S. Food and Drug Administration,” says Dr. Wapner. “Because of its design, total ankle replacement patients for the first time ever can maintain range of motion for the ankle without sacrificing surrounding tissue or bone.”
The STAR Ankle system is comprised of two titanium-coated structures that cover the lower bone of the ankle joint and the bottom of the shin bone (tibia). Between the two structures sits a medical-grade plastic piece designed to move in between the metal pieces as the joint moves.
“Unlike other total ankle replacements, this type of replacement doesn’t require bone cement,” says Dr. Wapner. “We actually shape the bones to fit the replacement.”
Pennsylvania Hospital is the only hospital in the Philadelphia region to offer the STAR system for total ankle replacement. The STAR system is currently recommended for people with end-stage arthritis of the ankle.
“Pennsylvania Hospital is the only hospital in the Philadelphia region to offer the STAR system for total ankle replacement.”
For more information or to schedule an appointment with a Penn orthopaedist, call 800-789-PENN (7366) or visit PennMedicine.org/ortho.






