EP0441601A1
Expired / Lapsed
EP
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Apparatus for preparation of a prosthesis
Assignee: Smith and Nephew Inc
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Filing: 1991-02-05
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Granted: —
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Expires: 2011-02-05
Abstract
Abstract A guide for milling the femur of a patient to receive a femoral hip prosthesis includes a guide body (11) having a lower end base portion (12) adapted to extend into intermedullary canal of the femur and an upper end portion comprised of at least one or preferably two spaced apart struts (13,14) whereby the overall configuration of the guide body can be substantially the same as the prosthesis body sought to be implanted in the patient. In the lower end of the guide body base there is provided one or more hemispherical receptacles (15,16) for holding the hemispherical end portion (21) of a spinning mill bit. A removable arcuate, transverse guide rail (30), is connected to a strut to guide the mill bit.
Inventors
- 👤 Thomas Wade Fallin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30728; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1742; A61B17/175; A61F2/30734; A61F2/32; A61F2/36; A61F2/3609; A61F2/3662; A61F2/367; A61F2/3672; A61F2/3676; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30116; A61F2002/30131; A61F2002/30182; A61F2002/30187; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30354; A61F2002/30433; A61F2002/30474; A61F2002/30476; A61F2002/30492; A61F2002/30535; A61F2002/30604; A61F2002/30616; A61F2002/30729; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30795; A61F2002/30797; A61F2/30907; A61F2002/30919; A61F2002/3625; A61F2002/365; A61F2002/3678; A61F2002/3686; A61F2002/3694; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0013; A61F2230/0028; A61F2230/0034
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A guide apparatus for preparing the femur of a patient with a mill guide to receive a femoral hip prosthesis comprising: a) a body having a lower end base adapted to extend into the intermedullary canal of the femur, and an upper end portion comprised of at least one strut; b) the lower end of the base having receptacle means for receiving and holding the end of a spinning mill; c) an arcuate transverse guide rail having means thereon for forming a connection with the upper end of the guide body, the arm having a curved surface that is adapted to guide the mill during preparation of the intermedullary canal of the patient's femur for receiving a hip prosthesis.
Claim 2
Dependent Claim
20 words
Apparatus according to claim 1 wherein the guide body comprises a base of a pair of struts extending upwardly therefrom.
Claim 3
Dependent Claim
32 words
Apparatus according to claim 1 or claim 2 further comprising a receptacle formed on the uppper end portion of the guide body for receiving the connection means portion of the guide rail.
Claim 4
Dependent Claim
30 words
Apparatus according to any one of the preceding claims wherein the connection forming means comprises a reversible connector that attaches the guide rail to the guide body in multiple positions.
Claim 5
Dependent Claim
20 words
Apparatus according to any one of the preceding claims wherein the guide body includes medial and lateral spaced apart struts.
Claim 6
Dependent Claim
16 words
Aparatus according to claim 5 wherein the connection means forms a connection with the medial strut.
Claim 7
Dependent Claim
75 words
Apparatus according to any one of claims 2 to 6 wherein the connection means comprises a receptacle carried by one of the struts of the guide, and pair of opposed pegs carried by one end portion of the guide rail for respectively attaching the guide rail to the guide body and pre-selected left and right respective positions so that the guide rail can be used to form posterior and anterior sides of the intermedullary canal.
Claim 8
Dependent Claim
35 words
Apparatus according to any one of claims 2 to 7 wherein the guide body includes a pair of spaced apart struts including a generally vertically upstanding strut and inclined strut forming an acute angle therewith.
Claim 9
Dependent Claim
40 words
Apparatus according to any one of claims 2 to 8 wherein the guide body defines an envelope having a shape corresponding to the shape of an upper end portion of the prosthesis body to be placed in the patient's femur.
Claim 10
Dependent Claim
35 words
Apparatus according to any one of the preceding claims wherein the receptacle means includes a pair of spaced apart, anterior and posterior receptacles each being sized to receive the lower end portion of the mill.
Claim 11
Dependent Claim
32 words
Apparatus according to any one of the preceding claims wherein the guide body defines an envelope having substantially the same configuration as the prosthesis body sought to be implanted in the patient.
Claim 12
Dependent Claim
73 words
Apparatus according to any one of the preceding claims wherein the guide rail includes an arcuate portion having a bearing surface thereon which allows the mill to track an arcuate path extending generally away from the central axis of the intermedullary canal so that the mill forms a cut in the intermedullary canal that increases the size of the intermedullary canal from the distal end portion thereof to the proximal end portion thereof.
Claim 13
Dependent Claim
44 words
Apparatus according to any one of the preceding claims wherein the guide rail includes a cantilevered arm portion extending away from the connection means, the cantilevered arm carrying a curved guide surface that is positioned to engage the mid-section of the mill during use.
Claim 14
Dependent Claim
100 words
Apparatus for preparing the femur to receive a hip prosthesis comprising: a) a mill guide as defined in any one of the preceding claims and b) an elongated mill having a lower end portion with a hemispherical tip thereon and circumferentially spaced apart cutter blades extending between the hemispherical tip and at least the mid-section of the mill the upper end portion of the mill having a tooled end portion receptive of a rotary drill for rotating the bit said hemispherical tip being adapted to be received in a receptacle formed in the lower end base portion of the guide.
References Cited (Backward Citations)
EP0263292A1
Cited
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