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Published on: May 14, 2020
[Mid-term outcome after implantation of a pyrocarbon endoprosthesis in patients with degenerative arthritis]
G Heers1, P Telisselis, F Winkler
1Orthopädie, Universität Regensburg, Bad Abbach. g.heers@asklepios.com
Aim:
The aim of this study was to make a mid-term evaluation of an unconstrained pyrocarbon prosthesis (Ascension®) in the treatment of idiopathic degenerative arthritis of the proximal interphalangeal joint of the hand.
Method:
13 implants (10 patients) were clinically and radiologically studied after a follow-up period of 71 months (range: 48-92 months).
Results:
The average ROM was 52° (± 27°STD). A luxation of the components did not occur and all implants are still in-situ. However, X-ray examination was unremarkable in only six fingers. In seven patients significant radiolucent lines (≥ 1 mm) were detected. Three prosthesis demonstrated axial subsidence and in one patient a loosening of the proximal component with axial rotation was observed.
Conclusion:
The results of this study show a high complication rate after an average of 6 years after implantation. Radiolucent lines in half of the cases may be explained by a lack of osteointegration of the prosthesis. The average ROM differs significantly from patient to patient, which has to be taken into account when discussing different treatment options.