Locking mechanism for a bone screw

Details Locking mechanism for a bone screw Locking mechanism for a bone screw

2007-02-06

2007-02-06

Robert, Eduardo C (Department: 3733)

Surgery

Instruments

Orthopedic instrumentation

Reexamination Certificate

active

10763961

ABSTRACT:
A locking mechanism for securing a bone screw20to a clamping element30of an osteosynthesis holding system5is provided. The bone screw20has a circumferential groove25located on a top portion of the screw20below a screw head22.Snap catches35protrude from a bone-contacting surface38of the clamping element30and interlock with the groove25in the screw20when the screw20is inserted into the clamping element30(e.g., when the screw is screwed into a bone segment through a hole in the clamping element). A removal device90is provided for removing the screw20,as a greater axial force is required to overcome the locking mechanism than is needed to engage the locking mechanism. A method for revision (removal) of the screw20from the locking mechanism is also provided.

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Advertisement for Profile Compression Plate, Depuy Motech, Inc., 1998 (2 pages).
Information regarding the VentroFix implant by Synthes. Although the date of publication of this information is unknown by Applicants, it is Applicants' understanding that the Ventrofix product was available before Applicants' priority date (4 pages).

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