Glenoid component installation tools
First Claim
1. An assembly for aligning and guiding a drill bit to form a hole in a glenoid surface of a scapula at a predetermined location, the assembly comprisinga drill guide including a first surface for abutting the glenoid surface and an opposite outwardly facing second surface, the drill guide being formed to include an aperture extending between the first and second surfaces for guiding the drill bit to form the hole in the glenoid surface,a handle for positioning the drill guide on the glenoid surface to align the aperture at the predetermined location over the glenoid surface, andmeans for selectively coupling the handle to the drill guide in a selected one of a plurality of angled orientations to align the handle at a selected angle with respect to the drill guide to facilitate positioning of the drill guide on the glenoid surface.
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Accused Products
Abstract
The present invention relates to instruments for preparing a glenoid surface of a scapula to receive a prosthetic glenoid component to replace the natural socket of a shoulder. More particularly, the present invention relates to a drill guide assembly for aligning and guiding a drill bit to form holes in the glenoid surface at predetermined locations to secure the glenoid component to the glenoid surface. A reamer assembly including a ratchet drive mechanism is also included to facilitate preparation of the glenoid surface prior to installation of the glenoid component.
516 Citations
30 Claims
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1. An assembly for aligning and guiding a drill bit to form a hole in a glenoid surface of a scapula at a predetermined location, the assembly comprising
a drill guide including a first surface for abutting the glenoid surface and an opposite outwardly facing second surface, the drill guide being formed to include an aperture extending between the first and second surfaces for guiding the drill bit to form the hole in the glenoid surface, a handle for positioning the drill guide on the glenoid surface to align the aperture at the predetermined location over the glenoid surface, and means for selectively coupling the handle to the drill guide in a selected one of a plurality of angled orientations to align the handle at a selected angle with respect to the drill guide to facilitate positioning of the drill guide on the glenoid surface.
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2. An assembly for aligning and guiding a drill bit to form a hole in a glenoid surface of a scapula at a predetermined location, the assembly comprising
a drill guide including a first surface for abutting the glenoid surface and an opposite outwardly facing second surface, the drill guide being formed to include an aperture extending between the first and second surfaces for guiding the drill bit to form the hole in the glenoid surface, a handle for positioning the drill guide on the glenoid surface to align the aperture at the predetermined location over the glenoid surface, and means for coupling the handle to the drill guide in a selected one of a plurality of orientations to align the handle at a selected angle with respect to the drill guide to facilitate positioning of the drill guide on the glenoid surface, wherein the drill guide includes a projection extending away from the second surface and the coupling means includes a head portion attached to the handle for engaging the projection to position the handle in the selected orientation with respect to the drill guide.
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11. An assembly for aligning and guiding a drill bit to form a hole in a glenoid surface of a scapula at a predetermined location, the assembly comprising
a drill guide including a first surface for abutting the glenoid surface and an opposite outwardly facing second surface, the drill guide being formed to include an aperture extending between the first and second surfaces for guiding the drill bit to form the hole in the glenoid surface, a handle for positioning the drill guide on the glenoid surface to align the aperture at the predetermined location over the glenoid surface, and means for coupling the handle to the drill guide in a selected one of a plurality of orientations to align the handle at a selected angle with respect to the drill guide to facilitate positioning of the drill guide on the glenoid surface, further comprising alignment means coupled to the drill guide for engaging a portion of a scapula to facilitate positioning of the drill guide aperture over the predetermined location on the glenoid surface.
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14. An assembly for aligning and guiding a drill bit to form a plurality of holes in a glenoid surface of a scapula at predetermined locations in relation to a center hole formed in the glenoid surface, and assembly comprising
a drill guide including an alignment peg for insertion into the center hole formed in the glenoid surface, the drill guide being formed to include a plurality of apertures for guiding the drill bit to form the plurality of holes in the glenoid surface, a handle for positioning the drill guide on the glenoid surface to align the plurality of apertures formed in the drill guide at their respective predetermined locations over the glenoid surface, and means for coupling the handle to the drill guide in a selected one of a plurality of orientations to align the handle at a selected angle with respect to the drill guide to facilitate positioning of the drill guide on the glenoid surface.
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23. An assembly for reaming a surface of a bone, the assembly comprising
a reamer including a cutting face, the reamer being rotatable about an axis of rotation, means coupled to the reamer for rotating the reamer in a predetermined direction about the axis of rotation, and means rotatably coupled to the rotating means and independently rotatable relative to said rotating means rotation to cause the cutting face of the reamer to engage the surface of the bone.
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26. An assembly for reaming a surface of a bone, the assembly comprising
a reamer including cutting face, the reamer being rotatable about an axis of rotation, a drive means coupled to the reamer for rotating the reamer about its axis of rotation in a first direction, an oscillating member coupled to the drive means for transmitting intermittent rotational movement to the drive means about the axis of rotation, the oscillating member including means for permitting rotation of the oscillating member alternately in the first direction and in a second direction opposite the first direction and ratchet means driven by the oscillating member for intermittently engaging the drive means to rotate the drive means in only the first direction upon rotation of the oscillating member in the first direction while permitting the oscillating member to rotate with respect to the drive means without engaging and rotating the drive means when the oscillating member moves in a second direction, and a pressure pad rotatably coupled to the oscillating member to permit an operator to apply pressure along the axis of rotation of the reamer to cause the cutting face of the reamer to engage the surface of the bone.
Specification