Automatic compression-distraction-torsion method and apparatus

Details Automatic compression-distraction-torsion method and apparatus Automatic compression-distraction-torsion method and apparatus

1989-03-08

1990-11-27

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

606 56, 606 58, 606 59, A61F 504

Patent

active

049733311

ABSTRACT:
An orthopaedic system is provided which includes a plurality of support members, a plurality of rods interconnecting the support members, a plurality of pins attached to the support members for passing through bone of a patient, and an automatic drive mechanism to control an adjustment mechanism of the rods to adjust the rod length of the rods to alter the relative positions of the support members. The drive mechanism includes at least one motor for incrementally adjusting the adjustment mechanism of at least one of the rods and a controller mechanism for providing pulses to the motor and for storing information regarding the number of stepwise adjustments of the rod length by the motor.

REFERENCES:
patent: 3941123 (1976-03-01), Volkov
patent: 3977397 (1976-08-01), Kalnberz
patent: 3985127 (1976-10-01), Volkov
patent: 4033340 (1977-07-01), Kalnberz
patent: 4338927 (1982-07-01), Volkov
patent: 4615338 (1986-10-01), Ilizarov
patent: 4768524 (1988-09-01), Hardy
patent: 4784125 (1988-11-01), Monticelli

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