EP0095296A2
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EP
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Tibial osteotomy guide assembly and method
Assignee: Cessione techmedica Inc
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Filing: 1983-05-16
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Granted: —
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Expires: 2003-05-16
Abstract
Abstract A guide assembly for use in a tibial osteotomy wherein two pairs of parallel guide pins (12) are inserted into the tibia at a predetermined angle with respect to each other through a guide block (20). The adjacent surfaces of the pairs of pins can then be used to precisely guide a saw by which a wedge-shaped segment of the tibia is removed preferably using a guide plate (34).
Inventors
- 👤 Douglas B. Minnesota Mining And Mains
- 👤 Kenneth E. Minnesota Mining And Merte
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 12:49
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/151; A61B17/152; A61B17/154; A61B17/157; A61B17/16; A61B17/17; A61B17/1732; A61B17/1739; A61B17/1764; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61B17/809; A61B17/8095
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
254 words
An osteotomy guide assembly characterized by four guide pins (12), each having a cutting end surface (14) adapted to cut bone tissue upon rotation of said guide pin about its axis with said cutting end surface pressed against said tissue, at least two of said guide pins having a locating mark (16), a first predetermined distance from said cutting end surface; a guide block (20) having a first pair of spaced parallel guide bores (22) adapted to closely receive the two of said guide pins having said locating narks, and a second pair of spaced parallel guide bores (24) adapted to receive the other two of said guide pins, said second pair of parallel guide bores converging with respect to said first pair and being oriented to direct the guide pins extending through the second bores so that a second plane tangent to and defined by the surfaces of the second pair of pins adjacent the first pair of pins will intersect a first plane tangent to and defined by the surfaces of the first pair of pins adjacent the second pair of pins at a predetermined angle and at a second predetermined distance from a locating surface on said guide block; said second predetermined distance having a known relationship to said first predetermined distance; and means (28) mounted on said guide block for fixing the position of said guide block along said first pair of pins against movement toward a surface positioned on the side of said block toward which said bores converge.
Claim 2
Dependent Claim
254 words
An osteotomy guide assembly characterized by four guide pins (12), each having a cutting end surface (14) adapted to cut bone tissue upon rotation of said guide pin about its axis with said cutting end surface pressed against said tissue, at least two of said guide pins having a locating mark (16), a first predetermined distance from said cutting end surface; a guide block (20) having a first pair of spaced parallel guide bores (22) adapted to closely receive the two of said guide pins having said locating narks, and a second pair of spaced parallel guide bores (24) adapted to receive the other two of said guide pins, said second pair of parallel guide bores converging with respect to said first pair and being oriented to direct the guide pins extending through the second bores so that a second plane tangent to and defined by the surfaces of the second pair of pins adjacent the first pair of pins will intersect a first plane tangent to and defined by the surfaces of the first pair of pins adjacent the second pair of pins at a predetermined angle and at a second predetermined distance from a locating surface on said guide block; said second predetermined distance having a known relationship to said first predetermined distance; and means (28) mounted on said guide block for fixing the position of said guide block along said first pair of pins against movement toward a surface positioned on the side of said block toward which said bores converge.
Claim 3
Dependent Claim
80 words
A guide assembly according to Claim 1, further characterized by the feature that said guide block has a plurality of second pairs of guide bores (24), each pair being adapted to receive the other two of said guide pins and being oriented to direct guide pins extending therethrough so that the second plane defined by those guide pins will intersect said first plane at a different predetermined angle at said second predetermined distance from said locating surface on said block.
Claim 4
Dependent Claim
41 words
A guide assembly according to Claim 1 or Claim 2, further characterized by the feature that said block has a thin cross-section (50) between said first and second pairs of guide bores affording severing of said block through said cross section.
Claim 5
Dependent Claim
70 words
A guide assembly according to Claim 1 or Claim 2, further characterized by the feature that said means for fixing comprises an adjustment member (28) adjustably mounted in said guide block for movement in a direction generally parallel to said first pair of guide bores, said adjustment member having an end surface (30) adapted to engage said surface positioned on the side of said block toward which said bores converge.
Claim 6
Dependent Claim
23 words
A guide assembly according to Claim 4, further characterized by the feature that said adjustment member (28) is threadably engaged in said block.
Claim 7
Dependent Claim
68 words
A guide assembly according to Claim 1 or Claim 2, further characterized by a guide plate (34) having parallel through openings (36) spaced and sized to slidably engage either of said pairs of guide pins located by said pairs of bores in said guide block, said guide plate having a planar saw guide surface (38) essentially parallel to a plane tangent to both openings through said guide block.
Claim 8
Dependent Claim
27 words
A guide assembly according to any one of Claims 1 to 6, further characterized by the feature that said first and second predetermined distances are the same.
Claim 9
Dependent Claim
150 words
An osteotomy guide assembly characterized by four guide pins (12), each having a cutting end surface (14) adapted to cut bone tissue upon rotation of said guide pin about its axis with said cutting end surface pressed against said tissue and being located in said tissue so that a plane tangent to and defined by the surfaces of one pair of pins will intersect a second plane tangent to and defined by the surfaces of the other pair of pins at a predetermined angle and at a second predetermined distance within the bone tissue; and a guide plate (34) having parallel through openings (36) spaced and sized to slidably engage either of said pairs of guide pins located by said pairs of bores in said guide block, said guide plate having a planar saw guide surface (38) essentially parallel to a plane tangent to both openings through said guide block.
Claim 10
Dependent Claim
150 words
An osteotomy guide assembly characterized by four guide pins (12), each having a cutting end surface (14) adapted to cut bone tissue upon rotation of said guide pin about its axis with said cutting end surface pressed against said tissue and being located in said tissue so that a plane tangent to and defined by the surfaces of one pair of pins will intersect a second plane tangent to and defined by the surfaces of the other pair of pins at a predetermined angle and at a second predetermined distance within the bone tissue; and a guide plate (34) having parallel through openings (36) spaced and sized to slidably engage either of said pairs of guide pins located by said pairs of bores in said guide block, said guide plate having a planar saw guide surface (38) essentially parallel to a plane tangent to both openings through said guide block.
References Cited (Backward Citations)
No citation records indexed.
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