EP0121142A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for shaping a distal femoral surface
Assignee: CESSIONE;WRIGHT MEDICAL TECHNOLOGY INC.
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Filing: 1984-03-08
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Granted: —
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Expires: 2004-03-08
Abstract
Abstract The present invention provides an apparatus for preparing the distal surface of a femur to receive a distal femoral prosthesis employing an intramedullary reamer 10 which is used to intemally locate the central long axis of the femur, an intramedullary alignment guide 30 which is inserted into the space left in the intramedullary canal upon removal of the reamer 10 and at least one femoral surface modifying instrument which cooperatively engages with a guide handle 36 attached to the intramedullary alignment guide 30 to accomplish the shaping of the distal femoral surface. The intramedullary alignment guide 30 has a rod portion 32 extending into the femoral intramedullary canal whose central long axis corresponds with the central long axis of the femur. The guide handle 36 is attached to that rod portion 32 at a preselected angle such that the shaping instruments fixed thereto assume the proper alignment with respect to the central long axis of the femur such that the distal femoral surface is shaped relattive to that axis in a simple and accurate manner.
Inventors
- 👤 Leo Allen Whiteside
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1675; A61B17/14; A61B17/15; A61B17/154; A61B17/155; A61B17/1659; A61B17/17; A61B17/1739; A61B17/1764
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
As an article of manufacture, a distal femoral surface shaping guide comprising the combination of (A) an intramedullary alignment guide (30) comprising (1) an intramedullary rod portion (32) adapted to closely fit in and extend through the narrowest portion of a human femur such that the central long axis of said femur passes through the central long axis of said intramedullary rod portion (32), (2) a guide handle (36) attache to and set at a preselected angle with respect to said axi of the intramedullary rod portion (32) and being adapted to receive at least one femoral surface modifying instrument (60, 80, 100, 120) in proper alignment with respect to said handle (36) and (3) a means (68, 106, 88, 36) for securing the combination of (1) and (2) in a fixed position in the femur with (B) atleast one femoral surface modifying instrument (60, 80, 100, 120) which is adapted to cooperatively engage said handle (36) and to assume an appropriate fixed relationship with respect to the distal femoral surface and to the central long axis of the femur, said instrument being further designed to aid in shaping the distal femoral surface in such a manner that a preselected femoral knee prosthesis can be attached to said surface.
Claim 2
Dependent Claim
209 words
As an article of manufacture, a distal femoral surface shaping guide comprising the combination of (A) an intramedullary alignment guide (30) comprising (1) an intramedullary rod portion (32) adapted to closely fit in and extend through the narrowest portion of a human femur such that the central long axis of said femur passes through the central long axis of said intramedullary rod portion (32), (2) a guide handle (36) attache to and set at a preselected angle with respect to said axi of the intramedullary rod portion (32) and being adapted to receive at least one femoral surface modifying instrument (60, 80, 100, 120) in proper alignment with respect to said handle (36) and (3) a means (68, 106, 88, 36) for securing the combination of (1) and (2) in a fixed position in the femur with (B) atleast one femoral surface modifying instrument (60, 80, 100, 120) which is adapted to cooperatively engage said handle (36) and to assume an appropriate fixed relationship with respect to the distal femoral surface and to the central long axis of the femur, said instrument being further designed to aid in shaping the distal femoral surface in such a manner that a preselected femoral knee prosthesis can be attached to said surface.
Claim 3
Dependent Claim
128 words
The article as claimed in claim 1 wherein at least one of the instruments employed in said (B) is an anterior-posterior cutting guide (60) comprising a guide plate (61) having a passage (62) passing through said cutting guide plate (61) and designed to cooperatively engage said guide handle (36) and a means (68) for fixing said cutting guide (60)in proper alignment with respect to said handle (36), said cutting guide (60) further having an upper resection guide surface (63, 65) for a resecting means (210) used to resect the anterior aspect of the femoral condyles and at least one lower resections guide surface (64, 66) for a resecting means used to , resect the posterior aspect of the femoral condyles relative to the alignment of the handle (36).
Claim 4
Dependent Claim
159 words
The article as claimed in claim 1 wherein at least one of the instruments employed in said (B) is a distal femoral condyle cutting guide (80) comprising a main body (81) having a passage (85) adapted to cooperatively engage said guide handle (36) and a means (88) for fixing said cutting guide (80) in proper alignment with respect to said handle (36), said main body (81) containing a guideplate (82) which is held by means of a connecting arm (84) between the main body (81) and the guideplate (82) at an angle which is transverse to the central long axis of said guide handle (36) and set at the same preselected angle with respect to the central long axis of the intramedullary rod (32) and of the femur as is the guide handle (36), said guideplate (82) having a resection means guide surface (83) thereon for resection the distal portion of the medial and lateral condyles of said femur.
Claim 5
Dependent Claim
166 words
The article as claimed in claim 1 wherein at least one of the instruments employed in said (B) is a plateau planer (120) comprising a planar abrading surface (121), a handle (123) and a shaft (124) connecting said planar abrading surface (121) to said handle (123), said planer (120) having a passage (126) therethrough adapted to co- i operatively engage said guide handle (123) and to allow the planar abrading surface (121) to be transversely rotated about the central axis of said guide handle (123) while it is in contact with the distal femoral surface to flatten said distal femoral surface transversely with respect to the central long axis of the guide handle (123), said planar abrading surface (121) containing a plurality of spaced cutting ridges (122) which are planar and are situated transverse to the central long axis of said guide handle (123) and further having a recessed area (128) thereon to avoid damage to anatomical members found below the intercondylar fossa of the femur.
Claim 6
Dependent Claim
116 words
The article as claimed in claim 1 wherein at least one of the instruments employed in said (B) is a bevel cutting guide (100) comprising a main body (105) having a passage (108) therethrough adapted to cooperatively engage said guide handle (36) and a means (106) for fixing said cutting guide (100) in proper alignment with respect to said handle (36), there being a plurality of bevel cutting guideplates (101, 102, 103, 104)attached to said main body (105) and situated at an appropriate angle with respect to a flattened distal femoral surface (224) such that the ' anterior and posterior aspects of the femoral condyles can be resected to produce a suitably bevelled distal femoral surface.
References Cited (Backward Citations)
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