Device and method for inserting a bone screw

Details Device and method for inserting a bone screw Device and method for inserting a bone screw

1979-05-18

1982-11-23

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

73761, 81467, B25B 2314, G01L 524

Patent

active

043599060

ABSTRACT:
A device for tightening a screw into bone material to a defined torque value M.sub.O less than that at which the bone irreversibly deforms including means for measuring the torque, M, necessary to obtain an angular rotation, .alpha., measured from the point where the screw first contacts the underlying material, and determining a value for M.sub.O as a function of M/.alpha..

REFERENCES:
patent: 3974883 (1976-08-01), Sigmund
patent: 4161220 (1979-07-01), Carlin et al.
patent: 4305471 (1981-12-01), Eshghy
S. M. Perren, et al. -"Die Mechanik der Plattenstellschraube"-Unfallheilkunde-Apr. 1978.

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