Apparatus for producing a conical surface on a bone

Details Apparatus for producing a conical surface on a bone Apparatus for producing a conical surface on a bone

1979-05-29

1981-01-27

Michell, Robert W.

Surgery

Truss

Perineal

30276, 128305, A61F 504, A61F 1732, B26B 700

Patent

active

042468957

ABSTRACT:
An apparatus for producing a conical, outwardly tapering surface on a bone, especially on a cylindrically pre-worked femur head of a human hip joint. The apparatus includes a drive shaft having a free end. A knife-type cutting device is arranged at the free end of the drive shaft, wherein the cutting device has an inner edge. An adjusting device is included for moving the inner cutting edge of the cutting device from an initial position essentially parallel to the longitudinal axis of the drive shaft to a position forming an acute angle relative to the longitudinal axis. The cutting edge of the cutting device is radially outwardly offset relative to the longitudinal axis of the drive shaft. In the initial position, the extent of radial offsetting is at least as great as half the diameter(r) of the bone section to be treated.

REFERENCES:
patent: 1002242 (1911-01-01), Ehrhardt
patent: 1408275 (1922-01-01), Eckles

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