Cerclage arrangement for fixing a bone fracture, comprising a plate that is provided with a number of continuous holes
A cerclage arrangement is for fixing a bone fracture and comprises a plate that is provided with at least one throughhole. A pin is equipped with a head with an opening that extends perpendicular to the direction of the pin and is used for guiding a cerclage band or wire therethrough. The cerclage pin encompasses a shaft which is provided with an end that extends through the plate so as to engage into the bone area that is to be fixed.
1. A cerclage arrangement used in fixing a bone fracture in a bone area, the cerclage arrangement comprising:
a cerclage pin extending along a vertical axis and including a head, a shaft depending beneath the head and a cone or rounded section positioned between the head and the shaft, the head being formed with an opening that extends along a first horizontal axis which is perpendicular to the vertical axis, the head having spaced apart outer sidewalls through which the opening passes, the head being constructed with a flat, bottom wall that extends through the opening, and a rounded groove that extends continuously from a top surface of the head into the flat bottom wall, the groove extending along a second horizontal axis that is perpendicular to the vertical axis and the first horizontal axis, the shaft having a smooth unthreaded external surface which terminates in a smooth end having a pointed or blunt tip;
a plate formed with wall structure defining at least one throughhole for receiving and retaining the cone or rounded section of the cerclage pin; and
a flexible band or wire engaged by the head and the plate and received through the opening,
whereby the cerclage pin together with the plate is capable of being positioned over the bone fracture in the bone area to be fixed, and an impacting force is capable of being applied to the groove to fix the shaft and the end in the bone area after which, the flexible band or wire is capable of being passed through the opening, and capable of being engaged along the flat bottom wall and the plate, and capable of being secured to a bone containing the bone fracture, the flexible band or wire being configured to provide a pulling effect which is capable of producing an evenly distributed contact pressure on the bone.
2. The cerclage pin of claim 1 , wherein the opening passes along an entire length of the outer sidewalls.
3. The cerclage pin of claim 1 , wherein the groove defines an impact surface adapted to be impacted by an impactor for driving the shaft and the end into the bone area.
4. The cerclage pin of claim 1 , wherein the head is partially cylindrical.
5. The cerclage pin of claim 1 , wherein the head, the shaft and the cone or rounded section are constructed of a body-compliant implant material.
6. The cerclage arrangement of claim 1 , wherein the at least one throughhole in the wall structure is adapted to overlie the bone area to be fixed, the cone or rounded section being engaged against the wall structure and the shaft passing through the throughhole.
7. The cerclage arrangement of claim 1 , wherein the cerclage pin and the flexible band are constructed of a body-compliant implant material.