US5383932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbable medullary plug
Assignee: Johnson and Johnson Professional Inc
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Filing: 1993-04-27
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Granted: 1995-01-24
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Expires: 2013-04-27
Abstract
Abstract A bone plug for intramedullary insertion into the canal of a bone to restrict the bypass of cement during implant surgery is described. The bone plug is made of a bioabsorbable material and has a tapered central body providing the primary support for the plug. A plurality of radially extending disc-like fins extend from the body at spaced locations. The taper provides the distal fin with a greater degree of flexibility due to the long cantilever, thus permitting an ease of insertion into the intramedullary canal while the larger diameter body and shorter proximal fins lend structural stiffness to resist the migration of the device.
Inventors
- 👤 Stephen Wilson
- 👤 Laurel Rogers
- 👤 Allan Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:31
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4614; A61F2/30721; A61F2/30723; A61L; A61L31/00; A61L31/04; A61L31/06; A61F2/32; A61F2/36; A61F2/3662; A61F2/3676; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30108; A61F2002/30199; A61F2002/30205; A61F2002/3021; A61F2002/30224; A61F2002/30225; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2/30767; A61F2/30771; A61F2002/30795; A61F2002/30797; A61F2002/30878; A61F2002/30884; A61F2002/30891; A61F2002/30892; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2002/4631; A61F2210/00; A61F2210/0004; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0063; A61F2230/0067; A61F2230/0069
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
46 words
An absorbable intramedullary bone plug for restricting cement flow in prosthesis implant surgery comprising a tapered longitudinal body having extending from the tapered longitudinal body a plurality of longitudinally spaced fins, each fin providing a continuous outer edge, said fins extending to approximately equal final diameters.
Claim 2
Dependent Claim
46 words
An absorbable intramedullary bone plug for restricting cement flow in prosthesis implant surgery comprising a tapered longitudinal body having extending from the tapered longitudinal body a plurality of longitudinally spaced fins, each fin providing a continuous outer edge, said fins extending to approximately equal final diameters.
Claim 3
Dependent Claim
15 words
An absorbable bone plug according to claim 1 wherein the plug is made from poly(p-dioxanone).
Claim 4
Dependent Claim
34 words
The absorbable bone plug according to claim 1 wherein the body defines a central longitudinal axis and tapers from approximately 2° to approximately 20° with respect to the central longitudinal axis of the body.
Claim 5
Dependent Claim
24 words
The absorbable bone plug according to claim 3 wherein the body tapers at approximately 5° with respect to the longitudinal axis of the body.
Claim 6
Dependent Claim
27 words
The absorbable bone plug according to claim 1 wherein the fins are disc shaped and taper from a root adjacent the body to an outer circumferential perimeter.
Claim 7
Dependent Claim
24 words
The absorbable bone plug according to claim 5 wherein the fins taper at approximately 2° to 10° to a central plane of the fin.
Claim 8
Dependent Claim
22 words
The absorbable bone plug according to claim 5 wherein the fins taper at approximately 5° to a central plane of the fin.
Claim 9
Dependent Claim
21 words
The absorbable bone plug according to claim 6 wherein the central plane runs perpendicular to a central axis of the body.
Claim 10
Dependent Claim
29 words
The absorbable bone plug according to claim 1 wherein an opening is defined in a proximal end of the body of the bone plug for receipt of an inserter.
Claim 11
Dependent Claim
31 words
The absorbable bone plug according to claim 9 wherein the opening defines a threaded portion for threadably mating with a distal end of an inserter for insertion into a bone canal.
Claim 12
Dependent Claim
66 words
An absorbable intramedullary bone plug comprising a central core having a first proximal portion which is substantially cylindrical in shape about a central longitudinal axis and a second distal portion which is tapered in the longitudinal direction said core having extending from said second portion a plurality of longitudinally spaced fins, each fin providing a continuous outer edge and said fins extending to approximately equal diameters.
Claim 13
Dependent Claim
66 words
An absorbable intramedullary bone plug comprising a central core having a first proximal portion which is substantially cylindrical in shape about a central longitudinal axis and a second distal portion which is tapered in the longitudinal direction said core having extending from said second portion a plurality of longitudinally spaced fins, each fin providing a continuous outer edge and said fins extending to approximately equal diameters.
Claim 14
Dependent Claim
15 words
An absorbable bone plug according to claim 11 wherein the plug is made from poly(p-dioxanone).
Claim 15
Dependent Claim
29 words
The absorbable bone plug according to claim 11 wherein the distal portion tapers from approximately 2° to approximately 20° with respect to the central longitudinal axis of the core.
Claim 16
Dependent Claim
25 words
The absorbable bone plug according to claim 11 wherein the central core tapers at approximately 7.5° with respect to the longitudinal axis of the core.
Claim 17
Dependent Claim
27 words
The absorbable bone plug according to claim 11 wherein the fins are disc shaped and taper from a root adjacent the core to an outer circumferential perimeter.
Claim 18
Dependent Claim
24 words
The absorbable bone plug according to claim 15 wherein the fins taper at approximately 2° to 10° to a central plane of the fin.
Claim 19
Dependent Claim
22 words
The absorbable bone plug according to claim 15 wherein the fins taper at approximately 5° to a central plane of the fin.
Claim 20
Dependent Claim
21 words
The absorbable bone plug according to claim 16 wherein the central plane runs perpendicular to a central axis of the core.
Claim 21
Dependent Claim
29 words
The absorbable bone plug according to claim 11 wherein an opening is defined at a proximal end of the core of the bone plug for receipt of an inserter.
Claim 22
Dependent Claim
31 words
The absorbable bone plug according to claim 19 wherein the opening defines a threaded portion for threadably mating with a distal end of an inserter for insertion into a bone canal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-23 | 1998-07-25 | 1999-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-23 | 2002-07-25 | 2003-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-23 | 2006-07-25 | 2007-01-24 | $7700.00 | Window Closed / Lapsed |