US5683395A — System for performing hip prothesis revision surg…

Claim 1

Independent Claim 87 words

In combination with handle having an impacting surface, a tamp for compacting bone graft material in a femur being prepared to receive a femoral prosthesis comprising: (a) a tapered stem extending from a distal end in increasing cross-sectional size to a proximal end, said stem having anterior, posterior, medial and lateral surfaces adjacent said proximal end, said proximal end having a handle engagement rail extending therefrom; and (b) a flange extending outwardly from major portions of said anterior, posterior and medial surface for compacting bone graft material.

Claim 2

Dependent Claim 87 words

In combination with handle having an impacting surface, a tamp for compacting bone graft material in a femur being prepared to receive a femoral prosthesis comprising: (a) a tapered stem extending from a distal end in increasing cross-sectional size to a proximal end, said stem having anterior, posterior, medial and lateral surfaces adjacent said proximal end, said proximal end having a handle engagement rail extending therefrom; and (b) a flange extending outwardly from major portions of said anterior, posterior and medial surface for compacting bone graft material.

Claim 3

Dependent Claim 21 words

A tamp according to claim 1 wherein said stem has a passageway extending from said distal end to said proximal end.

Claim 4

Dependent Claim 14 words

A tamp according to claim 2 wherein said flange is monolithic with said stem.

Claim 5

Dependent Claim 32 words

A tamp according to claim 3 wherein said flange extends outwardly from one of said posterior or anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Claim 6

Dependent Claim 38 words

A tamp according to claim 3 wherein said flange extends outwardly from said posterior and said anterior surfaces a distance of one to three millimeters and outwardly from said medial surface a distance of two to ten millimeters.

Claim 7

Dependent Claim 33 words

A tamp according to claim 5 wherein said flange extends outwardly from one of said posterior and said anterior surfaces a greater distance that from the other of said posterior or anterior surfaces.

Claim 8

Dependent Claim 77 words

A tamp according to claim 1 wherein (a) said stem proximal end has a first portion extending from said anterior, posterior and lateral surfaces and a second portion extending from said anterior, posterior and medial surfaces at an angle relative to said first portion, (b) said stem has a passageway extending from said distal end to said proximal end first portion and (c) said flange extends beyond said second portion to a position overlying said first portion.

Claim 9

Dependent Claim 23 words

A tamp according to claim 7 wherein said flange is a separately formed, modular unit affixed on said stem proximal end second portion.

Claim 10

Dependent Claim 32 words

A tamp according to claim 8 wherein said flange extends outwardly from one of said posterior or anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Claim 11

Dependent Claim 38 words

A tamp according to claim 8 wherein said flange extends outwardly from said posterior and said anterior surfaces a distance of one to three millimeters and outwardly from said medial surface a distance of two to ten millimeters.

Claim 12

Dependent Claim 33 words

A tamp according to claim 10 wherein said flange extends outwardly from one of said posterior and said anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Claim 13

Dependent Claim 153 words

In combination with a handle having an impacting surface, a tamp for compacting bone graft material in a femur being prepared to receive a femoral prosthesis comprising: (a) a tapered stem extending from a distal end in increasing cross-sectional size to a proximal end, said stem having anterior, posterior, medial and lateral surfaces adjacent said proximal end and a passageway extending from said distal end to said proximal end, a protrusion extending from said proximal end, said protrusion including a handle engaging rail, a recessed area adjacent said proximal end and an enlarged area spaced from said proximal end defining a shoulder; and (b) a modular flange for compacting bone graft material engaged to said protrusion in said recessed area and extending outwardly beyond said anterior, posterior and medial surfaces a distance not to exceed the thickness of bone graft material as measured from each of said anterior, posterior and medial surfaces, respectively.

Claim 14

Dependent Claim 153 words

In combination with a handle having an impacting surface, a tamp for compacting bone graft material in a femur being prepared to receive a femoral prosthesis comprising: (a) a tapered stem extending from a distal end in increasing cross-sectional size to a proximal end, said stem having anterior, posterior, medial and lateral surfaces adjacent said proximal end and a passageway extending from said distal end to said proximal end, a protrusion extending from said proximal end, said protrusion including a handle engaging rail, a recessed area adjacent said proximal end and an enlarged area spaced from said proximal end defining a shoulder; and (b) a modular flange for compacting bone graft material engaged to said protrusion in said recessed area and extending outwardly beyond said anterior, posterior and medial surfaces a distance not to exceed the thickness of bone graft material as measured from each of said anterior, posterior and medial surfaces, respectively.

Claim 15

Dependent Claim 38 words

A tamp according to claim 12 wherein said flange extends outwardly from said posterior and said anterior surfaces a distance of one to three millimeters and outwardly from said medial surface a distance of two to ten millimeters.

Claim 16

Dependent Claim 35 words

A tamp according to claim 13 wherein said flange extends outwardly from at least one of said posterior and said anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Claim 17

Dependent Claim 32 words

A tamp according to claim 12 wherein said flange extends outwardly from one of said posterior or anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Claim 18

Dependent Claim 93 words

A tamp according to claim 12 wherein said modular flange has spaced apart first and second surfaces and may be removed from said stem, inverted from a position in which said first surface is closest to said proximal end to a position in which said second surface is closest to said proximal end, said flange extending outwardly from said posterior surface a greater distance when said first surface is closest to said proximal end and outwardly from said anterior surface a greater distance when said second surface is closest to said proximal end.

Claim 19

Dependent Claim 78 words

A tamp according to claim 12 wherein said recessed area defines (i) a pair of sidewall portions tapering inwardly in a direction toward said medial surface and (ii) a connector portion facing said medial surface extending between said sidewall portions and said flange has (a) a pair of legs with inwardly facing walls engaging said sidewall portions and (b) an end portion from which said legs extend, said end portion including an end wall engaging said connector portion.

Claim 20

Dependent Claim 38 words

A tamp according to claim 17 wherein said recessed area is provided with a cavity inwardly from said connector portion and said flange is provided with a probe extending from said end wall and received in said cavity.

Claim 21

Dependent Claim 35 words

A tamp according to claim 17 wherein each of said legs inwardly facing walls extend to an opposing free end and is provided with a detent at said opposing free end engaged to said protrusion.

Claim 22

Dependent Claim 57 words

A tamp according to claim 17 wherein the shoulder of said protrusion is spaced from said proximal end a greater distance in the area facing said medial surface and tapers to a smaller distance as it extends away from said medial surface and said flange is thicker at said end portion than at said opposing free ends.

Claim 23

Dependent Claim 74 words

A tamp according to claim 12 wherein said recessed area defines (i) a pair of sidewall portions parallel to one another and (ii) a connector portion facing said medial surface extending between said sidewall portions and said flange has (a) a pair of legs with parallel inwardly facing walls engaging said sidewall portions and (b) an end portion from which said legs extend, said end portion including an end wall engaging said connector portion.

Claim 24

Dependent Claim 35 words

A tamp according to claim 21 wherein each of said sidewall portions has a groove extending from said connector portion and each of said legs has an outwardly extending tongue slideably received in said groove.

Claim 25

Dependent Claim 29 words

A tamp according to claim 21 wherein each of said sidewall portions has an outwardly directed tongue and each of said legs has a groove slideably receiving said tongue.

Claim 26

Dependent Claim 38 words

A tamp according to claim 21 wherein said recessed area is provided with a cavity inwardly from said connector portion and said flange is provided with a probe extending from said end wall and received in said cavity.

Claim 27

Dependent Claim 15 words

A tamp according to claim 21 wherein said flange consists of multiple, separately formed pieces.

Claim 28

Dependent Claim 65 words

A tamp according to claim 12 wherein said stem has a groove in each of said anterior surface and said posterior surface and said flange has (a) a pair of legs with parallel inwardly facing walls, each having a tongue engaged in a groove and (b) an end portion from which said legs extend, said end portion including an end wall engaging said medial surface.

Claim 29

Dependent Claim 37 words

A tamp according to claim 26 wherein said stem is provided with a cavity inwardly from said medial surface and said flange is provided with a probe extending from said end wall and received in said cavity.

Claim 30

Dependent Claim 67 words

A tamp according to claim 12 wherein said stem has a tongue extending from each of said anterior surface and said posterior surface and said flange has (a) a pair of legs with parallel inwardly facing walls, each having a groove receiving one of said tongues and (b) an end portion from which said legs extend, said end portion including an end wall engaging said medial surface.

Claim 31

Dependent Claim 37 words

A tamp according to claim 28 wherein said stem is provided with a cavity inwardly from said medial surface and said flange is provided with a probe extending from said end wall and received in said cavity.

Claim 32

Dependent Claim 119 words

In combination with a handle having an impacting surface, a tamp for compacting bone graft material in a femur being prepared to receive a femoral prosthesis comprising: (a) a tapered stem extending from a distal end in increasing cross-sectional size to a proximal end, said stem having anterior, posterior, medial and lateral surfaces adjacent said proximal end, a central passageway extending from major portion of said distal end to said proximal end and a plurality of connector passageways extending between said central passageway and said anterior, posterior, medial or lateral surface, said proximal end having a handle engaging rail extending therefrom; and (b) a flange extending outwardly from said anterior, posterior and medial surfaces for compacting bone graft material.

Claim 33

Dependent Claim 119 words

In combination with a handle having an impacting surface, a tamp for compacting bone graft material in a femur being prepared to receive a femoral prosthesis comprising: (a) a tapered stem extending from a distal end in increasing cross-sectional size to a proximal end, said stem having anterior, posterior, medial and lateral surfaces adjacent said proximal end, a central passageway extending from major portion of said distal end to said proximal end and a plurality of connector passageways extending between said central passageway and said anterior, posterior, medial or lateral surface, said proximal end having a handle engaging rail extending therefrom; and (b) a flange extending outwardly from said anterior, posterior and medial surfaces for compacting bone graft material.

Claim 34

Dependent Claim 23 words

A tamp according to claim 30 further including a source of vacuum for drawing fluid from said central passageway and said connector passages.

Claim 35

Independent Claim 184 words

A method of preparing a medullary canal of a femur for implantation of a hip prosthesis having a stem portion of predetermined configuration wherein said femur has a surgically prepared proximal end and a prepared cavity larger than said predetermined configuration extending distally from said proximal end comprising: (a) placing bone graft material in said cavity; (b) providing a tamp having a stem extending from a proximal end to a distal end and having a configuration similar to said predetermined configuration and having a passageway extending through said stem from said distal end to said proximal end, said tamp having a flange extending outwardly from said stem at said stem proximal end; (c) positioning a guidewire in said cavity; (d) placing said tamp over said guidewire with the guidewire extending through said passageway; (e) impacting said tamp against said bone graft material with said stem and said flange to compact said bone graft material substantially to said prepared proximal end to form a prosthesis receiving cavity, said flange being of such dimension as permit said compacting without said flange contacting said prepared proximal end.

Claim 36

Independent Claim 184 words

A method of preparing a medullary canal of a femur for implantation of a hip prosthesis having a stem portion of predetermined configuration wherein said femur has a surgically prepared proximal end and a prepared cavity larger than said predetermined configuration extending distally from said proximal end comprising: (a) placing bone graft material in said cavity; (b) providing a tamp having a stem extending from a proximal end to a distal end and having a configuration similar to said predetermined configuration and having a passageway extending through said stem from said distal end to said proximal end, said tamp having a flange extending outwardly from said stem at said stem proximal end; (c) positioning a guidewire in said cavity; (d) placing said tamp over said guidewire with the guidewire extending through said passageway; (e) impacting said tamp against said bone graft material with said stem and said flange to compact said bone graft material substantially to said prepared proximal end to form a prosthesis receiving cavity, said flange being of such dimension as permit said compacting without said flange contacting said prepared proximal end.

Claim 37

Dependent Claim 28 words

A method of preparing a medullary canal of a femur according to claim 32 further including apply a vacuum through said passageway to draw fluid from said cavity.

Claim 38

Dependent Claim 14 words

The method according to claim 32 wherein said flange is monolithic with said stem.

Claim 39

Dependent Claim 42 words

The method according to claim 32 wherein said tamp has anterior, posterior, medial and lateral surfaces and said flange extends outwardly from one or said posterior or anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Claim 40

Dependent Claim 48 words

The method according to claim 32, wherein said tamp has anterior, posterior, medial and lateral surfaces and said flange extends outwardly from said posterior and said anterior surfaces a distance of one to three millimeters and outwardly from said medial surface a distance of two to ten millimeters.

Claim 41

Dependent Claim 23 words

The method according to claim 32 wherein said flange is a separately formed, modular unit affixed on said stem proximal end second portion.

Claim 42

Dependent Claim 42 words

The method according to claim 37, wherein said tamp has anterior, posterior, medial and lateral surfaces and said flange extends outwardly from one of said posterior or anterior surfaces a greater distance than from the other of said posterior or anterior surfaces.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2000-11-03	2001-05-05	2001-11-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2004-11-03	2005-05-05	2005-11-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2008-11-03	2009-05-05	2009-11-04	$7700.00	Window Closed / Lapsed

System for performing hip prothesis revision surgery

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