초록 ▼

Disclosed is an improved screw member adapted to be threaded into a gap between two bone parts in BTB tendon transfer surgical operations, and a fixation tool for engaging the screw member. The screw member typically consists of a hollow cylindrical member comprising an axial bore having a hexagonal

Disclosed is an improved screw member adapted to be threaded into a gap between two bone parts in BTB tendon transfer surgical operations, and a fixation tool for engaging the screw member. The screw member typically consists of a hollow cylindrical member comprising an axial bore having a hexagonal cross section, and an outer circumferential surface provided with a strictly straight thread. The fixation tool comprises a transmission shaft having an intermediate section having a hexagonal cross section complementary to that of the axial bore of the screw member. Because the transmission shaft is entirely passed through the axial bore of the screw member, the torque for turning the screw member can be positively transmitted to the screw member, and the transmission shaft provides a positive guide action for the insertion of the screw member. The transmission shaft may be either axially slidably but rotatively integrally engaged to a handle grip or integrally attached to a handle grip.

대표청구항 ▼

A graft bone fixation tool for securing a bone piece, which is attached to one end of a length of tendon, in a bore formed in a bone part, comprising: a transmission shaft including a forward tip and an intermediate section provided with engagement means for torque transmission, said transmission sh

A graft bone fixation tool for securing a bone piece, which is attached to one end of a length of tendon, in a bore formed in a bone part, comprising: a transmission shaft including a forward tip and an intermediate section provided with engagement means for torque transmission, said transmission shaft being adapted to be slidingly fitted into and through an axial bore of a screw member, said transmission shaft being of a length such that said forward tip extends from the screw member axial bore, the screw member being provided with associated engagement means for cooperation with said engagement means of said transmission shaft, the screw member being provided with a screw thread around an outer circumference thereof for insertion into a gap between the bone piece and the bore; a rotary drive unit provided at a base end of said transmission shaft for manually rotating said transmission shaft so as to apply a torque to the screw member fitted on said intermediate section of said transmission shaft; wherein said forward tip of said transmission shaft is provided with a tapered or otherwise pointed tip which guides the screw member in a desired direction into the gap; and wherein said rotary drive unit comprises a handle grip, a rotary tube integrally attached to said handle grip, and an axial bore passing through said handle grip and said rotary tube for receiving said intermediate section of said transmission shaft in an axially slidable but rotatively engaged manner, a free end of said rotary tube being adapted to support an opposing axial end of the screw member.