US6017348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and methods for articular cartilage defect repair
Assignee: DePuy Mitek LLC
•
Filing: 1997-05-30
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Granted: 2000-01-25
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Expires: 2017-05-30
Abstract
Abstract A bone plug removal and emplacement tool includes a cylindrical cutting element having a proximal cutting edge and a cutting tooth. The outer surface of the cutting element can include an integral shoulder (e.g., in lieu of a replaceable outer sheath) that is spaced-apart from the proximal cutting edge and that engages the surface of the bone to define a depth stop for the cutting edge. An additional cylindrical element can be disposed within the cutting element. The proximal end of that additional element, which is referred to as a "harvester," is substantially aligned with the proximal end of the cutting element to receive a plug cut from the bone. The harvester can be slidably withdrawn from the cutting element to facilitate transplating the bone plug at another location. For this purpose, a stem or plunger can be slidably inserted and moved in the harvester to dislodge the plug.
Inventors
- 👤 Rickey D. Hart
- 👤 F. Alan Barber
- 👤 James C. Chow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/32053; A61B17/16; A61B17/1637; A61B17/1662; A61B17/1675; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30756; A61F2/46; A61F2/4601; A61F2/4603; A61F2/4618; A61F2/38; A61F2/3859; A61F2/28; A61F2002/2835; A61F2002/2839; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30759; A61F2002/30764; A61F2002/4625; A61F2002/4627; A61F2/4644; A61F2002/4649; A61F2230/00; A61F2230/0063; A61F2230/0069
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
152 words
A surgical assembly comprising a bone plug removal tool including: a cylindrical cutting element having an internal surface defining an internal bore extending along a longitudinal axis of the cutting element from a proximal end; a first cutting edge located at the proximal end of the cutting element for cutting a plug of bone as the cutting element is driven into a bone; at least one cutting tooth located substantially at the proximal end of the cutting element and extending into the internal bore of the cutting element in a direction that is substantially orthogonal to the longitudinal axis of the cylindrical cutting element; and the cutting tooth being defined by at least two planar and parallel surfaces extending substantially orthogonal to the longitudinal axis of the cutting element so as to form a second cutting edge for undercutting the bone plug when the first cutting edge is rotated inside the bone.
Claim 2
Dependent Claim
152 words
A surgical assembly comprising a bone plug removal tool including: a cylindrical cutting element having an internal surface defining an internal bore extending along a longitudinal axis of the cutting element from a proximal end; a first cutting edge located at the proximal end of the cutting element for cutting a plug of bone as the cutting element is driven into a bone; at least one cutting tooth located substantially at the proximal end of the cutting element and extending into the internal bore of the cutting element in a direction that is substantially orthogonal to the longitudinal axis of the cylindrical cutting element; and the cutting tooth being defined by at least two planar and parallel surfaces extending substantially orthogonal to the longitudinal axis of the cutting element so as to form a second cutting edge for undercutting the bone plug when the first cutting edge is rotated inside the bone.
Claim 3
Dependent Claim
26 words
A surgical assembly according to claim 1, wherein the cutting element comprises a plurality of cutting teeth substantially at the proximal end of the cutting element.
Claim 4
Dependent Claim
21 words
A surgical assembly according to claim 1, wherein the cutting tooth is any of substantially rectangular and substantially square in shape.
Claim 5
Dependent Claim
15 words
A surgical assembly according to claim 1, the cutting tooth is substantially triangular in shape.
Claim 6
Dependent Claim
31 words
A surgical assembly according to any of claims 3 and 4, wherein the cutting tooth extends between 1/16 and 1/4 of a diameter of the internal bore of the cutting element.
Claim 7
Dependent Claim
23 words
A surgical assembly according to claim 5, wherein the cutting tooth extends one-fifth of the diameter of the diameter of the internal bore.
Claim 8
Dependent Claim
148 words
A surgical assembly comprising a bone plug removal tool including: a a cylindrical cutting element having an internal surface defining an internal bore extending along a longitudinal axis of the cutting element from a proximal end to a distal end of the cutting element, a cutting edge located at the proximal end of the cutting element for cutting a plug of bone as the cutting element is driven into a bone, at least one cutting tooth located substantially at the proximal end of the cutting element and extending into the internal bore of the cutting element in a direction that is substantially orthogonal to the longitudinal axis of the cylindrical cutting element, and a harvester disposed within the internal bore of the cutting element, the harvester having a proximal end with an internal surface defining a cavity for receiving the plug of bone cut by the cutting edge.
Claim 9
Dependent Claim
148 words
A surgical assembly comprising a bone plug removal tool including: a a cylindrical cutting element having an internal surface defining an internal bore extending along a longitudinal axis of the cutting element from a proximal end to a distal end of the cutting element, a cutting edge located at the proximal end of the cutting element for cutting a plug of bone as the cutting element is driven into a bone, at least one cutting tooth located substantially at the proximal end of the cutting element and extending into the internal bore of the cutting element in a direction that is substantially orthogonal to the longitudinal axis of the cylindrical cutting element, and a harvester disposed within the internal bore of the cutting element, the harvester having a proximal end with an internal surface defining a cavity for receiving the plug of bone cut by the cutting edge.
Claim 10
Dependent Claim
17 words
A surgical assembly according to claim 7, wherein the havester is removably disposed within the cutting element.
Claim 11
Dependent Claim
17 words
A surgical assembly according to claim 7, wherein the havester is slidably disposed within the cutting element.
Claim 12
Dependent Claim
29 words
A surgical assembly according to claim 7, wherein the cavity of the harvester has a proximal end that is substantially aligned with the proximal end of the cutting element.
Claim 13
Dependent Claim
25 words
A surgical assembly according to claim 10, wherein the proximal end of the cavity is substantially aligned with the cutting edge of the cutting element.
Claim 14
Dependent Claim
28 words
A surgical assembly according to claim 10, wherein the proximal end of the cavity is substantially aligned with the proximal end of the tooth of the cutting element.
Claim 15
Dependent Claim
29 words
The assembly of claim 7, wherein the inner surface of the harvester comprises a bore in communication with the harvester cavity and extending the longitudinal length of the harvester.
Claim 16
Dependent Claim
22 words
The assembly of claim 7, further comprising a plunger disposed within at least the harvester cavity for dislodging the bone plug therefrom.
Claim 17
Dependent Claim
17 words
A surgical assembly according to claim 14, wherein the havester is removably disposed within the cutting element.
Claim 18
Dependent Claim
17 words
A surgical assembly according to claim 15, wherein the havester is slidably disposed within the cutting element.
Claim 19
Dependent Claim
31 words
A surgical assembly according to claim 7, wherein the bone plug removal tool comprises an anvil engaged at a distal end thereof for transmitting a driving force to the cutting element.
Claim 20
Dependent Claim
20 words
A surgical assembly according to claim 17, wherein the anvil is removably mounted to a distal end of the harvester.
Claim 21
Dependent Claim
27 words
A surgical assembly according to claim 17, wherein the anvil includes a stem concentrically mounted within a harvester bore for radially securing the anvil to the tool.
Claim 22
Dependent Claim
21 words
A surgical assembly according to claim 19, further comprising a buffer of resilient material located between the anvil and the harvester.
Claim 23
Dependent Claim
58 words
A bone plug remover comprising an outer element having a cutting portion disposed at a proximal end thereof for cutting a plug from a bone, an inner element having a receiving portion, substantially aligned with the cutting portion of the first element, for receiving the plug cut thereby, the inner element being removably disposed within the outer element.
Claim 24
Dependent Claim
58 words
A bone plug remover comprising an outer element having a cutting portion disposed at a proximal end thereof for cutting a plug from a bone, an inner element having a receiving portion, substantially aligned with the cutting portion of the first element, for receiving the plug cut thereby, the inner element being removably disposed within the outer element.
Claim 25
Dependent Claim
59 words
A method of repairing a defective articular cartilage, comprising removing a plug from bone with the bone plug remover of claim 21, disengaging the inner element of that bone plug remover from the outer element, positioning the receiving portion of the inner element substantially adjacent a bone hole and disgorging the plug from the inner element into that hole.
Claim 26
Dependent Claim
23 words
A method according to claim 22, comprising the step of disgorging the plug into the hole by pushing the plug with a plunger.
Claim 27
Dependent Claim
74 words
A method according to claim 23, comprising the steps of forming the hole in the bone at a site of articular cartilage damage, cutting the plug from the bone at a site that is substantially free of such damage, and placing the plug into the hole so that articular cartilage affixed to the plug is coextensive with, and in lateral registration with, articular cartilage external to the hole at the site of cartilage damage.
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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) | 2003-01-24 | 2003-07-26 | 2004-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-24 | 2007-07-26 | 2008-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-24 | 2011-07-26 | 2012-01-25 | $7700.00 | Window Closed / Lapsed |