EP0682916A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tibial milling guide system
Assignee: Bristol Myers Squibb Co
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Filing: 1995-05-16
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Granted: —
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Expires: 2015-05-16
Abstract
Abstract A tibial milling guide which incorporates a combination of instruments for producing a planar surface on a portion of the tibia using a milling device. The system includes: an extramedullary alignment guide with a detachable reference guide, an adjustable milling base assembly, a detachable milling template, a sizing gauge, and a milling depth gauge. The reference guide is used to position the alignment guide to the tibia. The reference guide has a T-shaped member which provides a planar reference and a centering reference to the tibial head. The reference guide also allows the surgeon to set the rotational alignment before the alignment guide is secured in place. The adjustable milling base assembly is also detachably connected to the alignment guide. The milling base assembly includes a slide and a shiftable base that allows for lateral adjustments of the template with respect to the articular surface after the alignment guide has been properly secured to the tibia. The milling base is also extensibly connected to the alignment guide to allow the spacing between the articular surface and the template to be adjusted.
Inventors
- 👤 Kim C. Dr. Bertin
- 👤 Robert Dr. Booth, Jr.
- 👤 Dennis W. Dr. Burke
- 👤 Rodney Bays
- 👤 Terry L. Dietz
- 👤 Gregory C. Stalcup
- 👤 Richard D. Vanlaningham
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1764; A61B17/1662; A61B17/1675; A61B2017/1602; A61B90/00; A61B90/06; A61B2090/062; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4657; A61F2002/4658
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
121 words
An apparatus for producing a planar surface on a portion of an exposed bone using a milling device, said apparatus comprising: a template means having a reference surface and defining a track such that said milling device engages said reference surface to control said depth of cut and said milling device may be guided along said track in two dimensions to cut said bone a predetermined distance from said reference surface, guide means secured adjacent said bone for positioning said template means over said bone portion, said template means is detachably connected to said guide means, said guide means includes alignment means for laterally aligning said template means over said bone portion when said alignment means is secured to said bone.
Claim 2
Dependent Claim
23 words
The apparatus of Claim 1 wherein said alignment means allows lateral movement of said template means over said bone portion in one dimension.
Claim 3
Dependent Claim
50 words
The apparatus of Claim 2 wherein said alignment means includes a slide part adapted to be laterally secured adjacent said bone and a base part carried by said slide part in sliding engagement for longitudinal movement along said slide part, said template means is detachably connected to said base part.
Claim 4
Dependent Claim
30 words
The apparatus of Claim 3 wherein said base part includes attachment means for connecting said base part to said bone when said template means is positioned over said bone portion.
Claim 5
Dependent Claim
22 words
The apparatus of Claim 1 wherein said alignment means allows movement of said template means over said bone portion in two dimensions.
Claim 6
Dependent Claim
75 words
The apparatus of Claim 5 wherein said alignment means includes a slide part adapted to be laterally secured adjacent said bone, a coupler carried by said slide part in sliding engagement with said slide part for movement longitudinally along said slide part, and a base part carried by said coupler in sliding engagement with said coupler for movement toward and away from said slide part, said template means is detachably connected to said base part.
Claim 7
Dependent Claim
30 words
The apparatus of Claim 5 wherein said base part includes attachment means for connecting said base part to said bone when said template means is positioned over said bone portion.
Claim 8
Dependent Claim
18 words
The apparatus of Claim 1 wherein said guide means also includes a shield mounted to said alignment means.
Claim 9
Dependent Claim
19 words
The apparatus of Claim 1 wherein said template means includes a planar template part having said track formed therein.
Claim 10
Dependent Claim
43 words
Said apparatus of Claim 1 wherein said guide means also includes an extramedullary guide secured adjacent said bone, said alignment means is extensibly connected to said extramedullary guide for movement adjacent said bone whereby said template means is spaced from said bone portion.
Claim 11
Dependent Claim
38 words
Said apparatus of Claim 10 wherein said extramedullary guide includes reference means detachably connected to said extramedullary guide instrument for proximally positioning said extramedullary guide adjacent said bone prior to securement of said extramedullary guide to said bone.
Claim 12
Dependent Claim
78 words
Said apparatus of Claim 11 wherein said reference means includes a body part adapted for longitudinal connection to said extramedullary guide and a planar member extending laterally from said body part, said planar member paralleling a portion of said bone when said extramedullary guide is properly positioned with respect to said bone, said planar member includes means for centering said planar member over said bone portion when said extramedullary guide is properly positioned with respect to said bone.
Claim 13
Dependent Claim
29 words
The apparatus of Claim 12 includes attachment means for extensibly connecting said body part to said extramedullary guide whereby said planar member can be spaced from said bone portion.
Claim 14
Dependent Claim
57 words
The apparatus of Claim 12 wherein said planar member includes two arms extending laterally across said planar member and a marker centered between said arms, said arms and point constituting said centering means whereby said marker overlies the center of said bone portion and each said arm extends equidistantly beyond a lateral extremity of said bone portion.
Claim 15
Independent Claim
89 words
An apparatus used with an extramedullary alignment guide to position said extramedullary guide with respect to a bone, said apparatus comprising: a body part adapted for longitudinal connection to said extramedullary guide and a planar member extending laterally from said body part, said planar member paralleling a portion of said bone when said extramedullary guide is properly positioned with respect to said bone, said planar member includes means for centering said planar member over said bone portion when said extramedullary guide is properly positioned with respect to said bone.
Claim 16
Dependent Claim
29 words
The apparatus of Claim 15 includes attachment means for extensibly connecting said body part to said extramedullary guide whereby said planar member can be spaced from said bone portion.
Claim 17
Dependent Claim
59 words
The apparatus of Claim 15 wherein said planar member includes two arms extending laterally across said planar member and a marker centered between said arms, said arms and point constituting said centering means whereby said marker generally overlies the center of said bone portion and each said arm generally extends equidistantly beyond a lateral extremity of said bone portion.
Claim 18
Independent Claim
155 words
An apparatus adapted for use with a milling guide for producing a planar surface on a portion of bone that measures said depth of a milling cut on said bone portion, said guide having reference surface positioned over said bone portion and a track defined therein, said apparatus comprising: a body part having a first face and a second face and a cavity defined between said first end and said second end, an extensible slide part shiftably disposed within said cavity for longitudinal movement therein, said slide part having a first end marked with indicia and extending partially beyond said body first face and a second end extending partial beyond said body second face, said first face being engageable with said reference surface wherein said second slide end extends through said track to contact said bone portion whereby said first end extends partially beyond said body first face such that a reading can be obtained.
Claim 19
Dependent Claim
23 words
The apparatus of Claim 18 wherein said body part includes stop means for limiting the travel of said slide part within said cavity.
Claim 20
Independent Claim
142 words
An apparatus for measuring said size of a portion of a bone comprising: an elongated planar body having a plurality of holes and an arm extending from one end of said body, each said hole being marked with indicia means for identifying a tibial size, said body also having second indicia means located between said holes and the other end of said body for identitying a tibial size, said apparatus being adapted for positioning laterally over said bone portion with said arm contacting one lateral extremity of said bone wherein one of said holes directly overlies the center of said bone portion such that a first reading can be obtained from the corresponding first indicia means and said other body end overlies the opposite lateral extremity of said bone such that a second reading can be obtained from said second indicia means.
References Cited (Backward Citations)
No citation records indexed.
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