Fixing device and applicator therefor
First Claim
1. A fixing device for use in orthopaedics, said fixing device comprising an elongate body portion having a longitudinal bore extending therethrough, said bore adapted for receiving a threaded body, wherein a mid wall section of the body portion has an increased wall thickness profile relative to a remainder of the body portion, said mid wall section defining at least one spiral aperture therein, such that, in use, said fixing device is inserted into an aperture in a bone structure and a threaded body is inserted into the bore and tightened therein by rotation relative to the fixing device, resulting in axial compression of the fixing device to close the at least one spiral aperture and cause circumferential expansion of the mid wall section of the fixing device to secure the fixing device within the aperture of the bone structure.
1 Assignment
0 Petitions
Accused Products
Abstract
A fixing device is disclosed which is primarily for use in orthopaedics. In one disclosed embodiment the fixing device includes an elongate body having a throughbore, wherein the elongate body has a number of spiral slots in the surface thereof. In use, the fixing device is inserted into an aperture in a bone and a screw is tightened within the throughbore of the elongate body, causing the body to expand and the slots to be closed in order to secure the fixing device in place within the aperture in the bone. An applicator device is also disclosed which in use holds the fixing device in place when a screw is tightened therein.
207 Citations
36 Claims
- 1. A fixing device for use in orthopaedics, said fixing device comprising an elongate body portion having a longitudinal bore extending therethrough, said bore adapted for receiving a threaded body, wherein a mid wall section of the body portion has an increased wall thickness profile relative to a remainder of the body portion, said mid wall section defining at least one spiral aperture therein, such that, in use, said fixing device is inserted into an aperture in a bone structure and a threaded body is inserted into the bore and tightened therein by rotation relative to the fixing device, resulting in axial compression of the fixing device to close the at least one spiral aperture and cause circumferential expansion of the mid wall section of the fixing device to secure the fixing device within the aperture of the bone structure.
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21. A fixing device for use with a threaded body, said fixing device comprising:
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an elongate body portion having a longitudinal bore extending therethrough, said bore adapted for receiving a threaded body, wherein a mid wall section of the body portion has an increased wall thickness profile relative to a remainder of the body portion;
a head portion having a diameter greater than that of the body portion; and
at least one spiral slot located in the mid wall section of the body portion of the fixing device, said at least one spiral slot winding in a clock-wise direction around the body portion;
such that, in use, said fixing device is inserted into an aperture in a surface of an object and a threaded body is inserted into the bore and tightened therein by rotation relative to the fixing device, causing axial compression of the fixing device and circumferential expansion of at least a portion thereof to secure the fixing device within the aperture. - View Dependent Claims (22, 23)
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24. An applicator device for preventing rotation of a fixing device of the type comprising an elongate body portion having a longitudinal bore extending therethrough, said bore adapted for receiving a threaded body, wherein a mid wall section of the body portion has an increased wall thickness profile relative to a remainder of the body portion, said mid wall section defining at least one spiral aperture therein when a threaded body is tightened therein, said applicator device comprising an elongate body having a throughbore, said elongate body having a first end adapted for engagement with a fixing device such that, in use, said first end will engage a portion of said fixing device and will be retained from rotational motion, and a tool will be inserted through the throughbore to engage and rotate the threaded body, allowing the threaded body to be rotated while the fixing device is held stationary.
- 25. An applicator device for preventing rotation of a fixing device when a threaded body is tightened therein, said applicator device comprising an elongate body having a throughbore, said elongate body having a first end adapted for engagement with a fixing device such that, in use, said first end will engage a portion of said fixing device and will be retained from rotational motion, and a tool will be inserted through the throughbore to engage and rotate the threaded body, allowing the threaded body to be rotated while the fixing device is held stationary.
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36. A method of performing surgery, said method involving the steps of:
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providing a fixing device having an elongate body portion and a longitudinal bore extending therethrough, said bore adapted for receiving a threaded body;
inserting said fixing device into an aperture in a bone structure;
aligning an orifice of a device to be fixed to the bone structure with the bore of the fixing device; and
inserting a threaded body through the orifice of the device and into the bore of the fixing device and tightening therein by rotation relative to the fixing device, causing axial compression of the fixing device and circumferential expansion of at least a portion thereof to secure the fixing device within the aperture and to secure the device to a surface of the bone structure.
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Specification