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Journal of Hand Surgery (British and European Volume)
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Articles

A New Prosthesis for the Metacarpophalangeal Joint

Study of materials and biomechanics

M. PETROLATI
G. ABBIATI
G. DELARIA
R. SOFFIATTI
P. ROBOTTI
C. GUERRIERO

From the Department of Plastic and Hand Surgery, Legnano City Hospital, Legnano, the Department of Research and Development, Tecres S. p. A., Sommacampagna, and the Institute of Histology and Embryology, Medicine and Surgery, University of Verona, Verona, Italy

Correspondence: Dr M. Petrolati, U. O. Chirurgia Plastica e della Mano, Via Candiani 2, 20025 Legnano (MI), Italy.

This report discusses the Daphne® prosthesis for the metacarpophalangeal joint on the basis of the mechanical, chemical and biological performance of the materials employed. The Daphne® prosthesis is a mobile device. The main body is made of a new generation polymethylmetacrylate, while the hinge is made of AISI 316 L stainless steel. Biocompatibility tests were performed on the materials employed. Systemic toxicity, cytotoxicity and contact tests have given favourable results. Mechanical engineering tests have been used to investigate the performances and reliability of the selected materials. The polymethylmetacrylate used in Daphne® behaves in a ductile fashion. No mechanical failures were encountered in fatigue tests after 10 million cycles.

Journal of Hand Surgery (British and European Volume), Vol. 24, No. 1, 59-63 (1999)
DOI: 10.1016/S0266-7681(99)90033-5
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