Method of surface finishing orthopedic implant devices

Details Method of surface finishing orthopedic implant devices Method of surface finishing orthopedic implant devices

1990-01-12

1991-10-15

DeMille, Danton D.

Surgery

Instruments

Orthopedic instrumentation

72 53, A61F 504, B21S 5128

Patent

active

050571087

ABSTRACT:
A surface treatment process for stainless steel orthopedic implant devices and an orthopedic implant device surface treated in accordance with the disclosed process are disclosed. A rough ground or machined stainless steel part is shot blasted with stainless steel shot. The device is then shot blasted with glass beads having a nominal size of between one-tenth and one-half that of the stainless steel shot. Electropolishing and passivation follow the shot blasting steps. A part thus treated includes a heavily cold-worked outer layer that enhances the fatigue properties of the stainless steel orthopedic implant device.

REFERENCES:
patent: 3073022 (1963-01-01), Bush
patent: 3531964 (1970-10-01), Manning, Jr.
patent: 3754976 (1973-08-01), Babaki
patent: 4135283 (1979-01-01), Kohlhage
patent: 4226111 (1980-10-01), Wahli
patent: 4581913 (1986-04-01), Reed
patent: 4612920 (1986-09-01), Lower
Glass Bead Impact Blasting, Michael Woelfel and Robert Mulhall, Sep. 1982, Metal Progress, vol. 122, No. 4, pp. 57-59.

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