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Freely separable surgical drill guide and plate

a surgical drill guide and plate technology, applied in the field of surgical drill guide and surgical plate, can solve the problem that the rim cannot fit through the plate hole, and achieve the effect of facilitating the extraction of the rim

Inactive Publication Date: 2005-01-04
SYNTHES USA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

To further facilitate extraction of the rim from the hole, the rim has a rounded cross section in a plane extending through the axis of the neck and rim, preventing the rim from catching on the plate during its extraction therefrom. Also, a surface of the rim substantially adjacent the neck and configured at a first angle thereto of preferably less than about 55°, and more preferably of about 45°.

Problems solved by technology

However, when the collet is in an expanded position, the rim does not fit through the plate hole.

Method used

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  • Freely separable surgical drill guide and plate
  • Freely separable surgical drill guide and plate
  • Freely separable surgical drill guide and plate

Examples

Experimental program
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Embodiment Construction

FIG. 1 shows an embodiment of a surgical drill guide assembly 8 according to the invention, which is adapted for use with a cervical spine locking plate. At a forward end of the drill guide assembly is a collet 10. Telescopically and slideably engaged within collet 10 is a guide sleeve 12. Preferably, a tissue protector 14 extends rearwardly from the sleeve 12. The collet 10, sleeve 12, and tissue protector 14 are adapted to axially receive a drill bit 16, and the guide sleeve 12 is sized to retain the spinning bit 16 in a precise coaxial alignment.

The collet 10 is fixed to a remote rear handle-member 18. The handle member 18 is pivotably attached to a scissor grip 20 by a handle pin 22. Together, handle member 18 and scissor grip 20 form a drill guide assembly handle 23, which allows a user to maneuver and use the drill guide assembly. The scissor grip 20 has an arm 24 that extends to the opposite side of the handle pin 22 from the grip 20 to pivotably attach to an actuation bar 26...

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PUM

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Abstract

Instrumentation for osteofixation including a locking bone plate and a surgical drill guide. The plate has a plurality of fastener holes with inner walls of a preselected hole diameter. The drill guide has a guide member, for guiding a drill bit, and a hollow collet disposed substantially coaxially with the guide member. A radially expandable forward end of the collet comprises a radially expandable neck and an outwardly projecting rim disposed forward of the neck. This rim defines a contracted outer rim diameter that is smaller than the hole diameter in a contracted collet position, and an expanded outer rim diameter that is larger than the hole diameter in an expanded position. Thus, the rim is freely extractable through the plate hole in the contracted position, but is unreceivable through the plate hole in the expanded position. The collet neck is configured and dimensioned to press outwardly against an inner wall of the plate hole when the neck is expanded.

Description

TECHNICAL FIELDThe present invention relates to a surgical drill guide and a surgical plate that are attachable to each other for retaining a precise alignment therebetween. More particularly, the invention relates to a bone plate with a fastener hole and surgical drill guide with an expandable collet having a rim that, when contracted, is smaller than the fastener hole.BACKGROUND OF THE INVENTIONSurgical fixation plates are used in many procedures to mend, align, and alter compression of patients' bones. These plates are primarily secured to the patient's bones by a plurality of fasteners such as screws. Proper orientation and alignment of fasteners and secure surgical fixation of the plates is crucial to avoiding future complications after implantation. This is especially the case for cervical spine locking-plates, such as sold by SYNTHES Spine. These plates are used for long term, intravertebral fixation, bone-fragment fixation, and anterior decompression in the cervical region o...

Claims

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Application Information

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IPC IPC(8): A61B17/68A61B17/80A61B17/17A61B17/16A61B17/58
CPCA61B17/1728A61B17/1757Y10S606/906
Inventor CESARONE, MORRIS D.
Owner SYNTHES USA
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