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Orthopedic-pins-for-external-fixator

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Orthopedic pins for external fixator

Details

Inventors: Miletich, Vel;
Assignee:
Primary Examiner: Hafer; Robert A.
Assistant Examiner: Brown; Michael
Attorney, Agent or Firm: Poms, Smith, Lande & Rose

An improved orthopedic pin for an external fixator has an enlarged diameter axial region wherein its diameter selected to be larger than a diameter of an osteal bore through which the pin is adapted to be disposed. A frustoconical section is adjacent each side of the enlarged region to form a bevelled surface on each side thereof which is at an angle sufficient to minimize insertion into the osteal bore while simultaneously reducing trauma to the soft tissue during insertion and removal of the pin.

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to overcome one or more of the disadvantages and limitations of the prior art enumerated hereinabove.
It is another object of the present invention to provide an improved orthopedic pin for use in an external fixator.
Yet another object of the present invention is to provide an improved clamp to minimize sheer forces on the orthopedic pins used in the external fixator.
According to the present invention, an orthopedic pin for an external fixator is constructed from a unitary piece of surgical steel.
More specifically, the orthopedic pin has an elongated cylindrical body having a first end portion, a second end portion and in accordance with the present invention, an enlarged diameter axial region.
The enlarged region has a diameter selected to be larger than the diameter of the osteal bore to which the pin is adapted to b disposed.
In a further embodiment of the present invention, the pin of unitary construction includes a first frustoconical region axially adjacent the enlarged region.
The frustoconical region forms a bevelled surface extending from a first circumferential edge of the enlarged region to the pin.
The bevelled surface has an angle from the axis of the pin selected to minimize trauma to soft tissue of the limb during insertion and further to minimize the depth of insertion of the frustoconical section into the osteal bore.
In still a further embodiment of the present invention, the pin includes a second frustoconical region axially adjacent the enlarged region.
The second frustoconical region forms another bevelled surface extending from a second circumferential edge of the enlarged region.
Again, the bevelled surface of the second frustoconical region forms an angle to the axis of the pin selected to minimize trauma to the soft tissue during removal of the pin.
The improved clamp of the present invention includes a bolt having a head portion and a threaded portion.
The head portion has a V-shaped groove disposed proximate the threaded portion

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