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MINERVA ORTOPEDICA E TRAUMATOLOGICA
A Journal on Orthopedics and Traumatology
UPDATES ON KNEE ARTHROPLASTY 102nd CONGRESS OF THE PIEMONTESE-LIGURIAN-LOMBARD SOCIETY OF ORTHOPEDICS AND TRAUMATOLOGY (S.P.L.L.O.T.) - Brescia September 9-10, 2005
NEW TECHNOLOGIES, MODERN INSTRUMENTARIUM IN ARTHROPLASTIC SURGERY
Minerva Ortopedica e Traumatologica 2005 August;56(4):275-8
Rotating hinge prosthesis in primary total knee arthroplasty
Annaratone G., Rivera F.
Dipartimento di Ortopedia Traumatologia e Riabilitazione Presidio Sanitario Gradenigo, Torino
With the increasing number of prosthetic devices, orthopaedic surgeons have an ever wider choice of solutions to the difficult problem of balancing soft tissues in cases of severe axial deformities. When instability or deformities are severe, however, the use of posterior stabilized or condylar constrained devices may not be sufficient, whereas a rotating hinge prosthesis may provide a viable surgical option. The Endomodel prosthesis has a metal-polyethylene contact surface and a central hinge that represent the crossed ligaments and the extra-articular capsular ligament system, thus permitting physiological movement of internal flexion-rotation and external extension-rotation. In cases of impaired ligament stability, the prosthesis is a hinged solution that permits natural-like joint kinematics. The ease of implanting the prosthesis and its long-term reliability, as confirmed by published studies and personal experience, make it an optimal choice in knee arthroplasty for severe laxity, as observed in advanced-stage gonarthrosis, fracture sequelae, severe axial deviation, and systemic diseases with chronic progression such as rheumatoid arthritis.