Patent US5628749A successfully refreshed from Google Patents.
US5628749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tibial resection instrumentation and surgical method
Assignee: Smith and Nephew Inc
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Filing: 1995-06-07
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Granted: 1997-05-13
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Expires: 2015-06-07
Abstract
Abstract A method of preparing a patient's proximal tibia with a surgical saw and cutting instrumentation is disclosed. The method of the present invention prepares the patient's proximal tibial to receive a tibial implant. The patient's intramedullary canal is first reamed and then an intramedullary rod is placed in the intramedullary canal as a reference. A first cutting instrument is bound on the rod above the patient's proximal tibia. The first cutting instrument includes a stylus that is used to set the depth of cut by referencing the top of the proximal tibia. The proximal tibia is then transversely cut with the saw by tracking the first cutting guide surfaces with the saw. The first cutting instrument is removed together with its stylus. A secondary cutting instrument is then placed on the rod above the proximal tibia. The second cutting instrument has a cutter at its center for cutting longitudinally into the proximal tibia. A secondary cut is made on the proximal tibia by tracking the secondary cutting instrument and a guide surface provided on the upper end of the cutters that engage the center of the proximal tibia.
Inventors
- 👤 Tim Vendrely
- 👤 Leo A. Whiteside
- 👤 Thomas A. T. Carls
- 👤 John Steele
- 👤 Chris E. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:40
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/157
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
104 words
A tibial stylus apparatus comprising: a) an instrument body; b) a reference member that can track the patient's intramedullary canal so that the reference member enables the surgeon to reference surgical cuts with respect to the patient's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) the stylus including a pair of adjustable stylus probe members each independently adjustable relative to the instrument body.
Claim 2
Dependent Claim
104 words
A tibial stylus apparatus comprising: a) an instrument body; b) a reference member that can track the patient's intramedullary canal so that the reference member enables the surgeon to reference surgical cuts with respect to the patient's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) the stylus including a pair of adjustable stylus probe members each independently adjustable relative to the instrument body.
Claim 3
Dependent Claim
30 words
The tibial stylus apparatus of claim 1 further comprising means for adjusting the instrument body position at the cutting guide surfaces relative to the referencing member in the anterior-posterior direction.
Claim 4
Dependent Claim
70 words
The tibial stylus apparatus of claim 1 wherein the instrument body comprises a plurality of separate, interconnectable body members including a first body member having transverse cutting guides surfaces thereon for guiding a surgeon's cutting blade during a transverse cutting of the proximal tibia, a second body member carrying the stylus means and a third body member forming a connection between the first body member and the second body member.
Claim 5
Dependent Claim
31 words
The tibial stylus apparatus of claim 1 wherein the rod forms a connection with the instrument body and wherein the cutting guide surfaces define a plane that transversely intersects the rod.
Claim 6
Dependent Claim
174 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) said mounting means including a rod that can track the patient's intramedullary canal so that the rod enables the surgeon to reference surgical cuts with respect to the patient's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus means carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) wherein the instrument body comprises a block member attachable to the patient's proximal tibia, a vertical strut having a lower end portion and an upper end portion, a horizontal strut that carries said stylus means, means for forming a connection between the lower end portion of the vertical strut and the block member, and means for forming a connection between the upper end portion of the vertical strut and the horizontal strut.
Claim 7
Dependent Claim
174 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) said mounting means including a rod that can track the patient's intramedullary canal so that the rod enables the surgeon to reference surgical cuts with respect to the patient's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus means carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) wherein the instrument body comprises a block member attachable to the patient's proximal tibia, a vertical strut having a lower end portion and an upper end portion, a horizontal strut that carries said stylus means, means for forming a connection between the lower end portion of the vertical strut and the block member, and means for forming a connection between the upper end portion of the vertical strut and the horizontal strut.
Claim 8
Dependent Claim
61 words
The tibial stylus apparatus of claim 5 wherein the horizontal strut comprises a horizontal member having a pair of arms, each arm carrying a stylus probe member, each stylus probe member being adjustably connectable along its length relative to the patient's proximal tibia so that either stylus probe member can be used by the surgeon to set a depth of cut.
Claim 9
Dependent Claim
120 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) said mounting means including a rod that can track the patient's intramedullary canal so that the rod enables the surgeon to reference surgical cuts with respect to the patient 's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus means carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) wherein the stylus means comprises a pair of probes that are adjustably mounted to the instrument body.
Claim 10
Dependent Claim
120 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) said mounting means including a rod that can track the patient's intramedullary canal so that the rod enables the surgeon to reference surgical cuts with respect to the patient 's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus means carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) wherein the stylus means comprises a pair of probes that are adjustably mounted to the instrument body.
Claim 11
Dependent Claim
13 words
The tibial stylus apparatus of claim 7 wherein the probes are generally parallel.
Claim 12
Dependent Claim
20 words
The tibial stylus apparatus of claim 8 wherein each of the probes is independently adjustable relative to the instrument body.
Claim 13
Dependent Claim
39 words
The tibial stylus apparatus of claim 9 each of the probes is affixable into a known position relative to the instrument body and further comprising indicia means for indicating the distance between each probe and the cutting guide surfaces.
Claim 14
Dependent Claim
114 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) a rod that can track the patient's intramedullary canal so that the rod enables the surgeon to reference surgical cuts with respect to the patient's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; and d) stylus means for setting a depth of cut at a selected condylar surface area of the patient's medial or lateral condylar surfaces, said stylus means including a pair of adjustable stylus probe members each independently adjustable relative to the instrument body.
Claim 15
Dependent Claim
114 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) a rod that can track the patient's intramedullary canal so that the rod enables the surgeon to reference surgical cuts with respect to the patient's intramedullary canal; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; and d) stylus means for setting a depth of cut at a selected condylar surface area of the patient's medial or lateral condylar surfaces, said stylus means including a pair of adjustable stylus probe members each independently adjustable relative to the instrument body.
Claim 16
Dependent Claim
16 words
The tibial stylus apparatus of claim 11 wherein the pair of stylus probes are generally parallel.
Claim 17
Dependent Claim
166 words
A tibial stylus apparatus comprising: a) an intramedullary rod that can fit a patient's tibial intramedullary canal, tracking the intramedullary canal axis; b) instrument body having an opening that registers with the intramedullary rod so that the body can be affixed to the rod at the opening, said body having means for enabling the surgeon to adjust the instrument body along an anterior to posterior path; c) a pair of stylus probes mounted on the instrument body, each of said probes being adjustable relative to the body and to one another to define a selective depth of cut; d) the body including a cutting guide having cutting guide surfaces thereon that enable the surgeon to transversely cut the patient's proximal tibia by tracking the cutting guide surfaces with a cutting blade, said cutting guide surfaces being affixed to said instrument body so that adjustment of a selected probe relative to the instrument body also adjusts the distance between a selected probe and the cutting guide surfaces.
Claim 18
Dependent Claim
166 words
A tibial stylus apparatus comprising: a) an intramedullary rod that can fit a patient's tibial intramedullary canal, tracking the intramedullary canal axis; b) instrument body having an opening that registers with the intramedullary rod so that the body can be affixed to the rod at the opening, said body having means for enabling the surgeon to adjust the instrument body along an anterior to posterior path; c) a pair of stylus probes mounted on the instrument body, each of said probes being adjustable relative to the body and to one another to define a selective depth of cut; d) the body including a cutting guide having cutting guide surfaces thereon that enable the surgeon to transversely cut the patient's proximal tibia by tracking the cutting guide surfaces with a cutting blade, said cutting guide surfaces being affixed to said instrument body so that adjustment of a selected probe relative to the instrument body also adjusts the distance between a selected probe and the cutting guide surfaces.
Claim 19
Dependent Claim
31 words
The tibial stylus apparatus of claim 13 wherein each stylus probe has a toothed rack thereon, and the instrument body carries means for engaging a selected tooth of the toothed rack.
Claim 20
Dependent Claim
17 words
The tibial stylus apparatus of claim 13 wherein each stylus probe is generally parallel to the rod.
Claim 21
Dependent Claim
14 words
The tibial stylus apparatus of claim 13 wherein the pair of probes are parallel.
Claim 22
Dependent Claim
27 words
The tibial stylus of claim 13 further comprising means for setting the position of a selected probe so that the surgeon likewise sets the depth of cut.
Claim 23
Dependent Claim
32 words
The tibial stylus of claim 13 wherein a pair of probes are independently adjustable so that the surgeon can measure a depth of cut at either the medial or lateral knee area.
Claim 24
Dependent Claim
36 words
The tibial stylus of claim 13 wherein one probe measures depths of cut at the medial side of the knee and the other probe measures depth of cut at the lateral side of the patient's knee.
Claim 25
Dependent Claim
31 words
The tibial stylus apparatus of claim 13 wherein a selected probe is positioned to touch a lateral or a medial side of the patient's knee for setting a depth of cut.
Claim 26
Dependent Claim
42 words
The tibial stylus apparatus of claim 13 wherein the cutting block has a portion that adjusts relative to the rod along an anterior to posterior path so that the surgeon can position the cutting guide surfaces very close to the patient's tibia.
Claim 27
Dependent Claim
29 words
The tibial stylus apparatus of claim 13 further comprising means for locking a stylus probe to the instrument body at a selected position along the length of the probe.
Claim 28
Dependent Claim
109 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) said mounting means including a referencing member that enables the surgeon to reference surgical cuts with respect to the patient's tibia; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus means carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) wherein the stylus means comprises a pair of probes that are adjustably mounted to the instrument body.
Claim 29
Dependent Claim
109 words
A tibial stylus apparatus comprising: a) an instrument body having mounting means for attaching the instrument body to a patient's proximal tibia; b) said mounting means including a referencing member that enables the surgeon to reference surgical cuts with respect to the patient's tibia; c) the body having cutting guide surfaces for guiding a surgeon's cutting blade during a cutting of the patient's proximal tibia; d) adjustable stylus means carried by the instrument body for setting a depth of cut at either of the patient's medial and lateral condylar surfaces; and e) wherein the stylus means comprises a pair of probes that are adjustably mounted to the instrument body.
Claim 30
Dependent Claim
29 words
The tibial stylus apparatus of claim 23 further comprising means for adjusting the instrument body position at the cutting guide surfaces relative to the rod in the anterior-posterior direction.
Claim 31
Dependent Claim
79 words
The tibial stylus apparatus of claim 23 wherein the instrument body comprises a block member attachable to the patient's proximal tibia, a vertical strut having a lower end portion and an upper end portion, a horizontal strut that carries said stylus means, means for forming a connection between the lower end portion of the vertical strut and the block member, and means for forming a connection between the upper end portion of the vertical strut and the horizontal strut.
Claim 32
Dependent Claim
58 words
The tibial stylus apparatus of claim 25 wherein the horizontal strut comprises a horizontal member having a pair of arms, each arm carrying a stylus probe, each stylus probe being adjustably connectable along its length relative to the patient's proximal tibia so that either stylus probe can be used by the surgeon to set a depth of cut.
Claim 33
Dependent Claim
70 words
The tibial stylus apparatus of claim 23 wherein the instrument body comprises a plurality of separate, interconnectable body members including a first body member having transverse cutting guides services thereon for guiding a surgeon's cutting blade during a transverse cutting of the proximal tibia, a second body member carrying the stylus means and a third body member forming a connection between the first body member and the second body member.
Claim 34
Dependent Claim
15 words
The tibial stylus apparatus of claim 23 wherein the referencing member is an elongated rod.
Claim 35
Dependent Claim
31 words
The tibial stylus apparatus of claim 28 wherein the rod forms a connection with the instrument body and wherein the cutting guide surfaces define a plane that transversely intersects the rod.
Claim 36
Dependent Claim
13 words
The tibial stylus apparatus of claim 23 wherein the probes are generally parallel.
Claim 37
Dependent Claim
20 words
The tibial stylus apparatus of claim 30 wherein each of the probes is independently adjustable relative to the instrument body.
Claim 38
Dependent Claim
39 words
The tibial stylus apparatus of claim 23 each of the probes is affixable into a known position relative to the instrument body and further comprising indicia means for indicating the distance between each probe and the cutting guide surfaces.
Claim 39
Dependent Claim
31 words
The tibial stylus apparatus of claim 23 wherein each stylus probe has a toothed rack thereon, and the instrument body carries means for engaging a selected tooth of the toothed rack.
Claim 40
Dependent Claim
17 words
The tibial stylus apparatus of claim 28 wherein each stylus probe is generally parallel to the rod.
Claim 41
Dependent Claim
27 words
The tibial stylus of claim 23 further comprising means for setting the position of a selected probe so that the surgeon likewise sets the depth of cut.
Claim 42
Dependent Claim
36 words
The tibial stylus of claim 23 wherein one probe measures depths of cut at the medial side of the knee and the other probe measures depth of cut at the lateral side of the patient's knee.
Claim 43
Dependent Claim
42 words
The tibial stylus apparatus of claim 28 wherein the cutting block has a portion that adjusts relative to the rod along an anterior to posterior path so that the surgeon can position the cutting guide surfaces very close to the patient's tibia.
Claim 44
Dependent Claim
29 words
The tibial stylus apparatus of claim 23 further comprising means for locking a stylus probe to the instrument body at a selected position along the length of the probe.
References Cited (Backward Citations)
US5282803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-12 | 2000-11-11 | 2001-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-12 | 2004-11-11 | 2005-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-12 | 2008-11-11 | 2009-05-13 | $7700.00 | Window Closed / Lapsed |