Method of shaping an endo-prosthesis, a femoral head prosthesis,

Details Method of shaping an endo-prosthesis, a femoral head prosthesis, Method of shaping an endo-prosthesis, a femoral head prosthesis,

1988-11-03

1991-08-20

Green, Randall L.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 22, A61F 236

Patent

active

050411411

ABSTRACT:
According to the present invention, the stress patterns at the interface between bone and cement of an existing prosthesis are calculated by a finite element model. For this model the external load, material properties and boundary conditions are provided. By means of advanced digital computers, stresses and strains in the model are calculated. Desired stress patterns are achieved through an optimization procedure to determine that geometry which generates those stress patterns which approximate the desired ones best.

REFERENCES:
patent: 4153953 (1979-05-01), Grobbelaar
patent: 4436684 (1984-03-01), White
patent: 4665492 (1987-05-01), Masters
patent: 4704686 (1987-11-01), Aldinger
patent: 4936862 (1990-06-01), Walker et al.
Roberts, J. C. et al.: "The Design of a Continuous Fiber Composite Surface Hip Replacement", Journal of Mechanical Design, vol. 102, 688-694, 1980.
Munzinger et al., "Biomechanics of Knee Prostheses", in First European Congress of Knee Surgery and Arthroscopy, Springer-Verlag, Berlin, pp. 324-334.

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