Patent EP0591985A1 successfully refreshed from Google Patents.
EP0591985A1
Expired / Lapsed
EP
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Glenoid alignment guide and method of use
Assignee: 3M Co
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Filing: 1993-10-08
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Granted: —
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Expires: 2013-10-08
Abstract
Abstract A glenoid alignment guide (30) for aligning a drill bit relative to the glenoid and the glenoid neck of a patient. The alignment guide comprises a retractor plate (32) for displacing the posterior and superior aspect of the deltoid muscle, and a drill guide (40) slidably movable along the retractor plate. The tip (36) of a narrow, curved finger (34) on the retractor plate is adapted to engage the bone of the glenoid neck to form a fulcrum for levering the muscle and other tissue clear of the glenoid. When the tip of the retractor plate engages the glenoid neck and the drill guide is advanced along the retractor plate against the glenoid face, the drill guide is adapted to guide a drill bit to make a hole from the glenoid face into the glenoid neck along the axis of the glenoid neck. This hole is then used to receive a fastener or locating peg of a glenoid component of a shoulder implant. The method of using the alignment guide is also disclosed.
Inventors
- 👤 John R. C/O 2501 Hudson Road Shearer
- 👤 Philip C/O 2501 Hudson Road Shelley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 13:36
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1778; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/40; A61F2/4081
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A glenoid alignment guide (30) for aligning a drill bit (62) relative to the glenoid (12) and the glenoid neck (10) of a patient, the glenoid alignment guide (30) comprising: a retractor plate (32) for displacing the posterior and superior aspect of the deltoid muscle, the retractor plate (32) having a curved finger (34) narrower than the plate (32) defining the forward end of the retractor plate (32), the finger (34) being adapted for insertion behind the glenoid (12), the tip (36) of the finger (34) being arranged to engage the bone of the glenoid neck (10) to form a fulcrum for levering the muscle and other tissue clear of the glenoid (10); and a drill guide (40) slidably carried on the retractor plate (32) and defining an axial path along which a drill bit (62) is guided, the drill guide (40) being movable along the retractor plate (32) to a forward position for engagement with the glenoid face (26), and having guide means (60) for guiding a drill bit (62) along the axial path to make a hole (63) from the glenoid face (26) into the glenoid neck (10) along the axis of the glenoid neck (10) to receive fastening or locating means of a glenoid component of a shoulder implant, the tip (36) of the retractor plate (32) when engaged against the bone of the glenoid neck (10) aligning the axial path defined by the drill guide (40) relative to the glenoid neck (10).
Claim 2
Dependent Claim
32 words
A glenoid alignment guide (30) according to claim 1 in which the tip (36) of the finger (34) has serrations adapted for non-slip engagement with the neck (10) of the glenoid (12).
Claim 3
Dependent Claim
57 words
A glenoid alignment guide (30) according to claims 1 or 2 in which the tip (36) of the finger (34) is spaced radially from the center (60a) of the axial path defined by the guide means (60) by 1.5mm to 2.5mm plus the radius of the drill bit (62) to be guided by the guide means (60).
Claim 4
Dependent Claim
55 words
A glenoid alignment guide (30) according to claim 3 in which the tip (36) of the finger (34) is spaced radially from the center (60a) of the axial path defined by the guide means (60) by 2.0mm to 2.5mm plus the radius of the drill bit (62) to be guided by the guide means (60).
Claim 5
Dependent Claim
59 words
A glenoid alignment guide (30) according to any of claims 1 to 4 adapted among other things for improved viewing of the glenoid face (26), the drill guide (40) having a periphery and a plurality of cut away portions (48) around the periphery to improve the view of the glenoid face (26) as the drill guide (40) is advanced.
Claim 6
Dependent Claim
43 words
A glenoid alignment guide (30) according to any of claims 1 to 5 in which the drill guide (40) has a generally convex-curved frontal surface (46) adapted to correspond to the generally concave-curved surface of the glenoid face (26) of the glenoid (12).
Claim 7
Dependent Claim
34 words
A glenoid alignment guide (30) according to any of claims 1 to 6 further comprising locking means (50) for releasably locking the drill guide (40) against the glenoid face (26) of the glenoid (12).
Claim 8
Dependent Claim
142 words
A glenoid alignment guide (30) according to claim 7 in which the tip (36) of the finger (34) and the guide means (60) define forward and rearward directions, respectively, along the alignment guide (30); the locking means (50) comprising: a rod (43) projecting rearwardly from the drill guide (40); a pivotable locking lever (52) having a hole (54) with an elongate cross section through which the rod (43) passes; and resilient urging means (56) for urging the locking lever (52) such that the rod (43) is gripped by the edges of the hole (54), so that retraction of the drill guide (40) is resisted by the gripping of the rod (43) by the locking lever (52) but is possible if the locking lever (52) is manually pivoted against the urging force of the resilient urging means (56) to release the rod (43).
Claim 9
Dependent Claim
101 words
A glenoid alignment guide (30) according to claim 8 in which the retractor plate (32) has a track (32a) mounting the drill guide (40) on the retractor plate (32) for sliding movement of the drill guide (40) along the track (32a) in the axial direction, the track (32a) constraining the drill guide (40) from rotation relative to the retractor plate (32), the drill guide (40) being mounted on the rod (43) to move axially together with the rod (43) to allow advancing the drill guide (40) along the track (32a) of the retractor plate (32) by manually moving the rod (43).
Claim 10
Dependent Claim
41 words
A glenoid alignment guide (30) according to claim 9 in which the retractor plate (32) has a main body having opposite side edges, and ribs (32a) extending from the main body along the opposite side edges to define the track (32a).
Claim 11
Dependent Claim
77 words
A glenoid alignment guide (30) according to any of claims 1 to 10 in which the drill guide (40) has a rear surface (42), the glenoid alignment guide (30) further comprising a drill bit (62) received and guided by the drill guide (40), and a collar (66) fitted around the drill bit (62) for engaging the rear surface (42) of the drill guide (40) to limit the penetration of the drill bit (62) into the glenoid bone.
References Cited (Backward Citations)
US5030219A
Cited
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