Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Reexamination Certificate
2006-08-22
2006-08-22
Isabella, David J. (Department: 3738)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
C623S020330
Reexamination Certificate
active
07094259
ABSTRACT:
The present invention generally comprises a fixed bearing prosthesis and a mobile bearing prosthesis. The fixed bearing prosthesis comprises a tibial component, a femoral component and a meniscal component and addressees the loss of congruency during deep knee flexion and the possible direct, repetitive contact of the tibial and femoral components. The tibial component of the fixed bearing prosthesis includes a tibial platform having an anterior and posterior edge. The meniscal component of the fixed bearing prosthesis includes a posterior ridge overlapping the posterior edge of the tibial platform that prevents metal-to-metal contact during deep knee flexion. The mobile bearing prosthesis comprises generally a tibial component, a femoral component and a meniscal component addresses the lack of conformity to natural biomechanical movement. The tibial component comprises a tibial platform having a curved rail system designed to mimic the asymmetrical rotation of femoral rollback while simultaneously providing sufficient anterior-posterior translation.
REFERENCES:
patent: 5395401 (1995-03-01), Bahler
patent: 6500208 (2002-12-01), Metzger et al.
patent: 6620198 (2003-09-01), Burstein et al.
S. Nakagawa, Y. Kadoya, S. Todo, A. Kobaysashi, H. Sakamoto, M.A.R. Freeman, Y. Yamano; Tibio-femoral,movement 3: full flexion in the living knee studied by MRI; The Journal of Bone & Joint Surgery (Br); vol. 82-B, No. 8, Nov. 2000.
Peter S. Walker, PHD, Richard D. Komistek, PHD, David S. Barrett, FRCS, Dylan Anderson, BS, Douglas A. Dennis, MD Andmadeleine Sampson, FRCR, FRCP; Motion of a Mobile Bearing Knee Allowing Translation and Rotation; The Journal of Arthroplasty, vol. 17, No. 1 2002.
Adams and Reese LLP
Isabella David J.
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