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Journal of Long-Term Effects of Medical Implants

ISSN Print: 1050-6934
ISSN Online: 1940-4379

Journal of Long-Term Effects of Medical Implants

DOI: 10.1615/JLongTermEffMedImplants.v12.i1.30
18 pages

A Long-Term Clinical Study on Dislocated Ankle Fractures Fixed with Self-Reinforced Polylevolactide (SR-PLLA) Implants

Nina H. Voutilainen
Department of Orthopaedics and Traumatology, Helsinki University Central Hospital, Topeliuksenkatu 5, FIN-00260 Helsinki, Finland
Michael W. Hess
Electron Microscopy Unit, Institute of Biotechnology, University of Helsinki, Finland
Terttu S. Toivonen
Department of Pathology, Maria Hospital, Helsinki, Finland
Leena A. Krogerus
Department of Pathology, Maria Hospital, Helsinki, Finland
Esa K. Partio
Department of Orthopaedics and Traumatology, Helsinki University Central Hospital, Topeliuksenkatu 5, FIN-00260 Helsinki, Finland
Hannu V. J. Patiala
Department of Orthopaedics and Traumatology, Helsinki University Central Hospital, Topeliuksenkatu 5, FIN-00260 Helsinki, Finland

ABSTRACT

Sixteen patients with dislocated ankle fractures fixed between 1988 and 1991 with self-reinforced poly(L-lactide; SR-PLLA) screws and/or rods were followed up after 8.6 to 11.7 years (mean 9.6 years) at the Department of Orthopaedics and Traumatology, Helsinki University Central Hospital. In all patients accurate reduction of the fractures was retained and uneventful bony union was achieved. Good or excellent long-term functional results were observed in 15 out of 16 patients. One patient had post-traumatic osteoarthritis. In 5 patients, a late tissue reaction was observed over an extruding screw head with mild symptoms, which led to removal of small palpable masses. There were two superficial wound infections, one after a primary operation and one caused by a late tissue reaction after an operation. The correct operative technique, where all extruding extraosseous SR-PLLA material should be removed during the primary operation, should be followed.