CA2102711A1 - Asymmetrical femoral condyle total knee arthroplasty prosthesis - Google Patents
Asymmetrical femoral condyle total knee arthroplasty prosthesisInfo
- Publication number
- CA2102711A1 CA2102711A1 CA002102711A CA2102711A CA2102711A1 CA 2102711 A1 CA2102711 A1 CA 2102711A1 CA 002102711 A CA002102711 A CA 002102711A CA 2102711 A CA2102711 A CA 2102711A CA 2102711 A1 CA2102711 A1 CA 2102711A1
- Authority
- CA
- Canada
- Prior art keywords
- femoral condyle
- femur
- condyle
- lateral
- knee arthroplasty
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3877—Patellae or trochleae
Abstract
ABSTRACT OF THE DISCLOSURE
A total knee arthroplasty prosthesis wherein the lateral femoral condyle is recessed more into the femur and is sloped cephelod and posterior when implanted on the femur when compared with the medial femoral condyle.
A total knee arthroplasty prosthesis wherein the lateral femoral condyle is recessed more into the femur and is sloped cephelod and posterior when implanted on the femur when compared with the medial femoral condyle.
Description
Wo 92/2~304 . P~r/US92/036~1 ~ ~ ~ 2 ;~
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: Total replaGes~nt o~ t~e anatomical Xnee o~with a pro theti~:~jo~ has b~3co~e an~ccepted, r~ins~ly com~nonplac:e9 ~rgi~al proc:edure. ~t the - ~ present ti3lle: the e~r~1 prost~e~ s prov~ed with ~e~ al D~dial arld late~l ~o~adyle~
~ d~s~d~tage ~:~ thQ u~e uf ~his~type o* prosthesis in : ~ total :~nee arthroplasty æ~e~ ~ ult~; in excessive 10~ eo~p~3s~ion~oxce~o~ patellzl~ componenl;~a~ the pat~ late~al e~ox~l coIIdyl~ ar1;ic:ula~ion producing pa~ r eo~po~ Sailu3:e wit~ n~:cept2lblei~reS~u~ncy and~ ;~e~rea~aed ~nge of motio~ ue ~o ~e tightness of .
p~:~lla ~a~ lt ~o~es o~rer ~ condyl~ during flexion ~d ex~en~;lon;~o~ the 3c~ee~
hape o~ he ~pxo~l;hes:18 i5 one of the ~ost ~iportant ~ao~ors inælu~ncing~post-operative:Xnee ~unction and ~he duration;of~prost~-sis su~rival. :
~he pres~t ii n~ention deæ~ tes a fe3noral 20 prosthesis wher~ the later~ noral condyle~ that which is nearest the outer side of:~e knee, is ::
recessed ~ore into the femur Ulan i8 the;medial ~emoral cond~le. In addition, the lateral ~e~oral condyle is sloped cephelod and po~terior when implanted on the 25 fe~ur compared wlth the inner or ~edial ~emoral condyle. Preferably this sloped portion is loca~ed in ~he mid portion of the lateral femoral condyle.
. .
, .
, .
, ;. .
~V 92~20304 c~ 7 ~ ~ P~/l)s92/03681 ~oreoYer, since the lalteral l~emoral co~dyle i8 al~o slightly rec~ssed towaxd ~:he femur as compared wi~h the Dlledial ~ oral condyle ~ as ~a knee i~ bell~, 'che patella ilaitially ~o~res in ~e patellar groove and then.
i5 per~tted to ~hift tow~rd the lateral femoral co~dyle ~nd t~us ~ore reaaily approach ~ts nzltural ~veme~t~ thu~ d~n~hing pa~tello emoral co~pr~ss~on orces.
~t i~ rl2~0re~ ~n obiect o~ thi8 imre~tion to ~roYid~ an asym~etrical ~moral condyle total knee ~opla~;ty pro~the~ wherei.n the lateral ~e~noral corldyle 1~; sligh'cly rece~sed tow~rd the ~emur ~s cc~aapared witla thQ ~di~ e~or~l condyle.
~t is al~o ~n ob~sct of this inYention to pro~vide ~;uGh a prosthesis; wh~r~in t:he lateral ~emoral eondyle ili; ~lop2d o~phel~ and posterior when ~pla~ted on the ~emur, preferably ~ver its ~idl portion, as compared wîth t~e ~edial fe~or~l c:ondyle.
Tt i . ~I stlll ~rt:her o~; ect o~ this in~ ion to pro~id~ 23uch a pros~eæis ~hic:h permlt~;
th~ patella ~co a~sum~ a more normal route o~ t:ravel as ~,la knee i~ ~lexed or exten~ed.
hese, tog~ther with other obje~s and ad~antages s~f the invention wlll ~ecome ~ore readily apparent to those skilled in the art when ~e Iollowing gen~ral ~tatement~ and desc:rip~cions are read in the liS~ht of th~ appen~d drawings.
Fig~. 1 and 2 ~ w, respectively, a front view and a ~:ide elevation view of the prior ~rt 3 o de~ice~; .
Figs. 3 ~nd 4 show the æame views of the present invention.
Fig. 5 hows the present invention positioned in the lcnee ; oint .
Fig. ~ is a ~;~ction 6-~ o~ Pig. 7 showing the , -",, , , . ~ , . " ~, , . .. ,,.. ., ,. ", . : .
.; , . .
.
WO 92/20304 ~ 1 ~ 2 7 1 1 PCl ~USg2/03681 pro~;th~sis of the present in~ention ~ nstalled in the fe~ur and ps~sit~oned with respect: 'co the patella with the leg ill a vertis:al pOSitiOI~.
Fig,. '7 i~; a vertical ~ w of the pre~ent E~ ~ n~entiorl ~nd ~ts rela~iollsh~p to th~ pat~lla as the lesJ 1~ bent at an appro~i~ate 60' ;~ngle as ~hown in the ev~tion view o Fig. 9.
Fig. 8 i6 a ~ver~;i~l ~ri~w o~ e presen~
~ enti~ ~ relation~hip to che pa~lla as the leg is f~er bent to an ~pproxi~a~ 100 angle :as shown ~n the ~;ide elevation v~e~ o~ ~ig. lo Fi~s. 1 and 2 show ~e prior ar1: d~oes ~h~rQ1~ lt will be noted ~hat ¢ondyles 10 ~nd 11 ~s sho~ ~ F~g. 1 ~re at the ~a~ne elevation and have the i~l2~ti~:al continuou~ ~arvature a. 6hown in Fig. 2.
~ef~rring now Dlore particuJarly to Fig. 3, the i~vention i~; ~ho~n with the late~l ~emoral ccndyle 12 J~e~n~ xece~ ed more ~nto the ~smur than is th~ edial fe~aoral c:on~yle 13. ~ot on~y i8 1:he la~eral fe~oral e~ndyle 12 rece~s~d more ~nto the femur th~n i8 the D~ediLal ~emoral co~adyle 13 ~ bu~ iLt i 1 80 soDIewhat ~loped aæ 6hown a~ 14 ~n Fig. ~a. The invention $s ~;hc~ : in PigA S ~positi~~ d on the insert 15 at the uppar end o~ the tibi~ î6.
Referring now Dlore particularls~ to Fig. 6, which i~; a section of Fig. 7 o~ ction S-6, the patella is sho~m at 17 with: the lat~r~l ~emoral condyle 12 and the ~edial femoral colldyle 13 also shown. W~en necessary, a plastic patellar aomponent 18 is attached to the inner side o~ the patella 17 which articulates with the condyles 12 and 13 as the knee ~ s flexed or ex tended.
rurning n3W more particularly to Fig. 7 the femur 19 is ~hown with the prosthesis identified generally at 20 installed on the emur. Also shown are . . .
.. ..
.. , , ;. . .
.. . .. ..
. ~ , . . . . ..
, W092/2~304 ~ 7 1~ PCriVS9~/036~]
th@ femor~l co~one~t lug~; 21--21. The tibia 16 has asn upper plastic inqert: 15 ~nd lthe loped portion 14 o~
the lateral fe~oral condyl¢ '~ 2 ~ s ~1150 sho~n ~ n rel21t~e pos~tion to ~e patella 17 and the patellar coDIpon~nt guide 1~.
Re~erring now ~ore p~i~:ularly ts:~ Figs. 8 and 9, the kn~ ls ~;hown pcssltion~d at approximat01y 60 ~gree~ o~ flexlon. In Fig. 13 l'c will be ~een that the pat:~lla g7 and the plastic patellar c:ompor~eng 18 have ~ooved îa~rally 1:o 60~e ~xt~t o~rer the lateral Pemoral c:or~dyle 12 portion o~ the prosthes~; 80 as to ~in~ize patellar f~oral ~orce ~wlth qua~ioeps use ~ile ~lexing or extending the knee.
Pce~ersing now to ~ig. 9, it wiIl be seen that the plastic patellar Go~ponent 18 aesoc:lated w~ he patella 17 en~ages the sloped port:ion 1~ of the later~l oral c:ondyle 12, ~us ~ur~er minimizing the patellar Iemoral compre sion rorce.
R~erring now to Fig~;0 10 and 11, th~ lmee i~
sho&m flexed at an ~pproxi~ate 100 degr~e angle. It will ~e seç!!n that the patella `17 has now reachQd thQ
e~tral op~n portiol between the two s:ondyles 12 and 13 h Y~ng traYersed the lalt~ emoral c:ondyle 12 and t:he sloE)ed portion 14 OI th~ lakeral felaoral condyle 1~.
The use o~ thiæ prostheæi~ pemlits the patella 17 more neaxly to ~iDliC ~e nor~al ~ove~nent in its travel a~
- the knee i s b~nt or extended.
' ~ ' '.' ' ~ ' , ', ,
.
:
'::
.
.
.
: Total replaGes~nt o~ t~e anatomical Xnee o~with a pro theti~:~jo~ has b~3co~e an~ccepted, r~ins~ly com~nonplac:e9 ~rgi~al proc:edure. ~t the - ~ present ti3lle: the e~r~1 prost~e~ s prov~ed with ~e~ al D~dial arld late~l ~o~adyle~
~ d~s~d~tage ~:~ thQ u~e uf ~his~type o* prosthesis in : ~ total :~nee arthroplasty æ~e~ ~ ult~; in excessive 10~ eo~p~3s~ion~oxce~o~ patellzl~ componenl;~a~ the pat~ late~al e~ox~l coIIdyl~ ar1;ic:ula~ion producing pa~ r eo~po~ Sailu3:e wit~ n~:cept2lblei~reS~u~ncy and~ ;~e~rea~aed ~nge of motio~ ue ~o ~e tightness of .
p~:~lla ~a~ lt ~o~es o~rer ~ condyl~ during flexion ~d ex~en~;lon;~o~ the 3c~ee~
hape o~ he ~pxo~l;hes:18 i5 one of the ~ost ~iportant ~ao~ors inælu~ncing~post-operative:Xnee ~unction and ~he duration;of~prost~-sis su~rival. :
~he pres~t ii n~ention deæ~ tes a fe3noral 20 prosthesis wher~ the later~ noral condyle~ that which is nearest the outer side of:~e knee, is ::
recessed ~ore into the femur Ulan i8 the;medial ~emoral cond~le. In addition, the lateral ~e~oral condyle is sloped cephelod and po~terior when implanted on the 25 fe~ur compared wlth the inner or ~edial ~emoral condyle. Preferably this sloped portion is loca~ed in ~he mid portion of the lateral femoral condyle.
. .
, .
, .
, ;. .
~V 92~20304 c~ 7 ~ ~ P~/l)s92/03681 ~oreoYer, since the lalteral l~emoral co~dyle i8 al~o slightly rec~ssed towaxd ~:he femur as compared wi~h the Dlledial ~ oral condyle ~ as ~a knee i~ bell~, 'che patella ilaitially ~o~res in ~e patellar groove and then.
i5 per~tted to ~hift tow~rd the lateral femoral co~dyle ~nd t~us ~ore reaaily approach ~ts nzltural ~veme~t~ thu~ d~n~hing pa~tello emoral co~pr~ss~on orces.
~t i~ rl2~0re~ ~n obiect o~ thi8 imre~tion to ~roYid~ an asym~etrical ~moral condyle total knee ~opla~;ty pro~the~ wherei.n the lateral ~e~noral corldyle 1~; sligh'cly rece~sed tow~rd the ~emur ~s cc~aapared witla thQ ~di~ e~or~l condyle.
~t is al~o ~n ob~sct of this inYention to pro~vide ~;uGh a prosthesis; wh~r~in t:he lateral ~emoral eondyle ili; ~lop2d o~phel~ and posterior when ~pla~ted on the ~emur, preferably ~ver its ~idl portion, as compared wîth t~e ~edial fe~or~l c:ondyle.
Tt i . ~I stlll ~rt:her o~; ect o~ this in~ ion to pro~id~ 23uch a pros~eæis ~hic:h permlt~;
th~ patella ~co a~sum~ a more normal route o~ t:ravel as ~,la knee i~ ~lexed or exten~ed.
hese, tog~ther with other obje~s and ad~antages s~f the invention wlll ~ecome ~ore readily apparent to those skilled in the art when ~e Iollowing gen~ral ~tatement~ and desc:rip~cions are read in the liS~ht of th~ appen~d drawings.
Fig~. 1 and 2 ~ w, respectively, a front view and a ~:ide elevation view of the prior ~rt 3 o de~ice~; .
Figs. 3 ~nd 4 show the æame views of the present invention.
Fig. 5 hows the present invention positioned in the lcnee ; oint .
Fig. ~ is a ~;~ction 6-~ o~ Pig. 7 showing the , -",, , , . ~ , . " ~, , . .. ,,.. ., ,. ", . : .
.; , . .
.
WO 92/20304 ~ 1 ~ 2 7 1 1 PCl ~USg2/03681 pro~;th~sis of the present in~ention ~ nstalled in the fe~ur and ps~sit~oned with respect: 'co the patella with the leg ill a vertis:al pOSitiOI~.
Fig,. '7 i~; a vertical ~ w of the pre~ent E~ ~ n~entiorl ~nd ~ts rela~iollsh~p to th~ pat~lla as the lesJ 1~ bent at an appro~i~ate 60' ;~ngle as ~hown in the ev~tion view o Fig. 9.
Fig. 8 i6 a ~ver~;i~l ~ri~w o~ e presen~
~ enti~ ~ relation~hip to che pa~lla as the leg is f~er bent to an ~pproxi~a~ 100 angle :as shown ~n the ~;ide elevation v~e~ o~ ~ig. lo Fi~s. 1 and 2 show ~e prior ar1: d~oes ~h~rQ1~ lt will be noted ~hat ¢ondyles 10 ~nd 11 ~s sho~ ~ F~g. 1 ~re at the ~a~ne elevation and have the i~l2~ti~:al continuou~ ~arvature a. 6hown in Fig. 2.
~ef~rring now Dlore particuJarly to Fig. 3, the i~vention i~; ~ho~n with the late~l ~emoral ccndyle 12 J~e~n~ xece~ ed more ~nto the ~smur than is th~ edial fe~aoral c:on~yle 13. ~ot on~y i8 1:he la~eral fe~oral e~ndyle 12 rece~s~d more ~nto the femur th~n i8 the D~ediLal ~emoral co~adyle 13 ~ bu~ iLt i 1 80 soDIewhat ~loped aæ 6hown a~ 14 ~n Fig. ~a. The invention $s ~;hc~ : in PigA S ~positi~~ d on the insert 15 at the uppar end o~ the tibi~ î6.
Referring now Dlore particularls~ to Fig. 6, which i~; a section of Fig. 7 o~ ction S-6, the patella is sho~m at 17 with: the lat~r~l ~emoral condyle 12 and the ~edial femoral colldyle 13 also shown. W~en necessary, a plastic patellar aomponent 18 is attached to the inner side o~ the patella 17 which articulates with the condyles 12 and 13 as the knee ~ s flexed or ex tended.
rurning n3W more particularly to Fig. 7 the femur 19 is ~hown with the prosthesis identified generally at 20 installed on the emur. Also shown are . . .
.. ..
.. , , ;. . .
.. . .. ..
. ~ , . . . . ..
, W092/2~304 ~ 7 1~ PCriVS9~/036~]
th@ femor~l co~one~t lug~; 21--21. The tibia 16 has asn upper plastic inqert: 15 ~nd lthe loped portion 14 o~
the lateral fe~oral condyl¢ '~ 2 ~ s ~1150 sho~n ~ n rel21t~e pos~tion to ~e patella 17 and the patellar coDIpon~nt guide 1~.
Re~erring now ~ore p~i~:ularly ts:~ Figs. 8 and 9, the kn~ ls ~;hown pcssltion~d at approximat01y 60 ~gree~ o~ flexlon. In Fig. 13 l'c will be ~een that the pat:~lla g7 and the plastic patellar c:ompor~eng 18 have ~ooved îa~rally 1:o 60~e ~xt~t o~rer the lateral Pemoral c:or~dyle 12 portion o~ the prosthes~; 80 as to ~in~ize patellar f~oral ~orce ~wlth qua~ioeps use ~ile ~lexing or extending the knee.
Pce~ersing now to ~ig. 9, it wiIl be seen that the plastic patellar Go~ponent 18 aesoc:lated w~ he patella 17 en~ages the sloped port:ion 1~ of the later~l oral c:ondyle 12, ~us ~ur~er minimizing the patellar Iemoral compre sion rorce.
R~erring now to Fig~;0 10 and 11, th~ lmee i~
sho&m flexed at an ~pproxi~ate 100 degr~e angle. It will ~e seç!!n that the patella `17 has now reachQd thQ
e~tral op~n portiol between the two s:ondyles 12 and 13 h Y~ng traYersed the lalt~ emoral c:ondyle 12 and t:he sloE)ed portion 14 OI th~ lakeral felaoral condyle 1~.
The use o~ thiæ prostheæi~ pemlits the patella 17 more neaxly to ~iDliC ~e nor~al ~ove~nent in its travel a~
- the knee i s b~nt or extended.
' ~ ' '.' ' ~ ' , ', ,
Claims (5)
1. A femoral condyle knee arthroplasty prosthesis comprising a lateral femoral condyle and a medial femoral condyle, said lateral femoral condyle being recessed more into the femur than said medial femoral condyle.
2. A prosthesis according to claim 1, wherein said lateral femoral condyle is also sloped cephelod and posterior when implanted on the femur as compared with said medial femoral condyle.
3. A prosthesis according to claim 2, wherein said sloped cephelod and posterior portion of said lateral femoral condyle is in the mid portion of said lateral femoral condyle.
4. A prosthesis according to claim 1, wherein the difference between the amount that said lateral femoral condyle is recessed more into femur when compared with said medial femoral condyle is sufficient to permit the patella to minimize patellar femoral force when flexing or extending the knee.
5. A prosthesis according to claim 2, wherein the amount that said lateral femoral condyle is sloped cephelod and posterior when implanted on the femur as compared with said medial femoral condyle, is sufficient to permit the patella to minimize patellar femoral force when flexing or extending the knee.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US705,404 | 1991-05-24 | ||
| US07/705,404 US5133759A (en) | 1991-05-24 | 1991-05-24 | Asymmetrical femoral condye total knee arthroplasty prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2102711A1 true CA2102711A1 (en) | 1992-11-25 |
Family
ID=24833312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002102711A Abandoned CA2102711A1 (en) | 1991-05-24 | 1992-05-05 | Asymmetrical femoral condyle total knee arthroplasty prosthesis |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5133759A (en) |
| EP (1) | EP0586530A4 (en) |
| AU (1) | AU1976592A (en) |
| CA (1) | CA2102711A1 (en) |
| WO (1) | WO1992020304A1 (en) |
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| US5728162A (en) * | 1993-01-28 | 1998-03-17 | Board Of Regents Of University Of Colorado | Asymmetric condylar and trochlear femoral knee component |
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| US7239908B1 (en) | 1998-09-14 | 2007-07-03 | The Board Of Trustees Of The Leland Stanford Junior University | Assessing the condition of a joint and devising treatment |
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| WO2002022014A1 (en) | 2000-09-14 | 2002-03-21 | The Board Of Trustees Of The Leland Stanford Junior University | Assessing the condition of a joint and devising treatment |
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-
1991
- 1991-05-24 US US07/705,404 patent/US5133759A/en not_active Expired - Fee Related
-
1992
- 1992-05-05 CA CA002102711A patent/CA2102711A1/en not_active Abandoned
- 1992-05-05 EP EP9292912340A patent/EP0586530A4/en not_active Withdrawn
- 1992-05-05 WO PCT/US1992/003681 patent/WO1992020304A1/en not_active Application Discontinuation
- 1992-05-05 AU AU19765/92A patent/AU1976592A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US5133759A (en) | 1992-07-28 |
| EP0586530A1 (en) | 1994-03-16 |
| WO1992020304A1 (en) | 1992-11-26 |
| EP0586530A4 (en) | 1994-08-24 |
| AU1976592A (en) | 1992-12-30 |
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