Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1988-11-07
1990-07-31
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 238
Patent
active
049447572
ABSTRACT:
A modular knee joint prosthesis using variably sized components for joining a variably resected tibia bone and a femur bone, having a tibial platform defining peripheral edges on its bottom surface for engaging beveled edges of the plates or spacers. The platform has an upraised boss on a top surface for engaging a tibial insert which can be locked in place with a lock key. The tibial insert serves as an articulating surface for a femoral component. An implantable stem extends below the platform and may be complementarily joined to a second stem; the stems lock together using a Morse taper and a locking bolt. Full-sized or half-sized extension plates have beveled edges on a top surface to engage complementing edges on the bottom surface of the tibial base plate. The plates act as a spacer or cap to the resected tibia and act to distribute load or make up for bone deficits.
REFERENCES:
patent: 4219893 (1980-09-01), Noiles
patent: 4257129 (1981-03-01), Volz
patent: 4731086 (1988-03-01), Whiteside et al.
Tibial Component Fixation In Deficient Tibial Bone Stock, P. Brooks et al., Clinical Orthopaedics and Related Research, vol. 184, Apr. 1984, pp. 302-308.
Carignan Roger G.
Martinez David M.
Stulberg S. David
Apley Richard J.
Crosby David F.
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