Implantable splint for correcting lumbosacral spondylodesis

Details Implantable splint for correcting lumbosacral spondylodesis Implantable splint for correcting lumbosacral spondylodesis

1982-05-28

1984-02-28

Rosenbaum, C. Fred

Surgery

Truss

Perineal

128 92B, 128 92R, A61F 504

Patent

active

044336772

ABSTRACT:
A spinal distraction splint has two like anchor screws extending along respective longitudinal screw axes and adapted to be anchored in the pelvis with the axes crossing. Each of the screws has a head formed with a transversely open recess centered on a respective transverse axis and with an annular array of teeth centered on and angularly equispaced about the respective transverse axis. A bolt extends through one of the recesses and is threaded in the other recess. Thus the bolt secures the heads together with the transverse axes coaxial and the teeth interengaged. Respective distraction rods each have one end braced on the respective screw and another end braced oppositely against a vertebra. Once the two anchor screws are properly inserted and then their heads are locked together the interfitting teeth on the heads absolutely locks them against angular rotation relative to each other about the axis of the fastener bolt and all other relative motion is eliminated by the clamping action of this bolt.

REFERENCES:
patent: 4175555 (1979-11-01), Herbert
Zimmer Catalog, 1973, p. D67, Fig. 10, Warsaw, Ind. 46580.

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