Screw removal system

Details Screw removal system Screw removal system

1997-10-02

1999-09-14

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 60, 606 62, 606 63, A61B 1756

Patent

active

059515546

ABSTRACT:
A screw removal system is provided that can be used to remove a broken screw piece, which is embedded in a bone. The screw removal system includes an internally-threaded outer tube and a T-handled shaft which screws into the tube. The outer tube includes at one end two flange legs that engage the second or third thread of the broken screw piece and a bonding component sized to engage the broken screw piece. With the outer tube held in a stationary position by a wrench, the T-handled shaft is rotated downwardly to force the flange legs, and the bonding component into a locking engagement with the broken screw piece. After this locking engagement is achieved, the outer tube wrench is held so that it can rotate with the T-handled shaft and the broken screw piece can be unscrewed out of the bone upon continued rotation of the T-handled shaft, which causes the rotation of both the outer tube and the engaged screw piece.

REFERENCES:
patent: 1683796 (1928-09-01), Pearce
patent: 3106233 (1963-10-01), Wolny
patent: 4688315 (1987-08-01), Jannke
patent: 5643259 (1997-07-01), Sasso et al.

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