DOS Kongressen 2014 ·
93
Five year survival rate of STAR ankle replacement
Johnny Frøkjær, Lasse Petersen
Orthopedic department, foot & ankle section, Odense University Hospital;
Orthopedic department, Odense University Hospital
Background:
Total ankle replacement has become a good alternative to arthro-
desis in the treatment of ankle arthrosis in selected patients. Results have been
variable, therefore we find it of interest to report our results.
Purpose / Aim of Study:
The aim of the study was to find our five year sur-
vival rate, for the STAR ankle replacement, at our institution.
Materials and Methods:
We evaluated the intermediate prosthesis survival
rate of 200 STAR ankle replacements, inserted in 196 patients between 2004
and 2013 at our department. 109 were men and 87 women. Four patients
were operated bilaterally. Surgical concept was to align the ankle during first
surgical procedure, if there was any alignment. Patients were seen annually until
at least six years after index surgery. We retrospectively evaluated the pros-
thesis survival, using our database, where data were continously registred at
surgery and at follow up. Furthermore patient records were used, to exclude
surgery at other hospitals. Revision was defined as “removal or exchange of one
or more components with the exception of incidental exchange of the polyeth-
ylene insert” The surgical guide system was changed during this period
Findings / Results:
Ten patients had a revision performed, four of these were
among the first ten patients operated - illustrating the steep learning curve.
Additional three patients had the polyethylene liner exchanged. Using the above
mentioned end point, 5 year survival rate for the STAR ankle replacement is
94% (95% CI-interval 0,89-0,99)
Conclusions:
We find the intermediate survival rate of the STAR ankle replace-
ment excellent. Learning curve problems could only be detected for the first
surgeon, while problems for next two surgeons were eliminated. We will con-
tinue to follow our patients, with regular controls, and will report further sur-
vival rates.
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