ITMI940496A1 - Protesi femorale particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo - Google Patents
Protesi femorale particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo Download PDFInfo
- Publication number
- ITMI940496A1 ITMI940496A1 IT000496A ITMI940496A ITMI940496A1 IT MI940496 A1 ITMI940496 A1 IT MI940496A1 IT 000496 A IT000496 A IT 000496A IT MI940496 A ITMI940496 A IT MI940496A IT MI940496 A1 ITMI940496 A1 IT MI940496A1
- Authority
- IT
- Italy
- Prior art keywords
- femoral prosthesis
- stem
- proximal
- distal
- aforementioned
- Prior art date
Links
- 239000007943 implant Substances 0.000 title claims description 9
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
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- 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
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- A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
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Landscapes
- Health & Medical Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Description
DESCRIZIONE del Brevetto per Invenzione Industriale avente per titolo:
"PROTESI FEMORALE PARTICOLARMENTE STUDIATA PER LA RE-VISIONE DI IMPIANTI PROTESICI CHE HANNO AVUTO ESITO NEGATIVO
D E S C R I Z IO N E
Il presente trovato ha come oggetto una protesi femorale, particolarmente studiata per la revisione di impianti protesici, che hanno avuto esito negativo.
Come è noto, le protesi femorali, che vengono attualmente utilizzate, risultano realizzate in corpo unico.
Questa monoliticità dell’insieme non consente al chirurgo di eseguire un corretto adattamento della protesi sul paziente, soprattutto nei casi in cui è necessario revisionare degli impianti protesici, che hanno avuto esito negativo.
Il compito che si propone il trovato è quello di risolvere il problema sopra esposto, realizzando una protesi femorale ad elementi modulari, che dia la possibilità di adattarsi correttamente alle diverse morfologie del paziente, soprattutto nei casi in cui è necessario sostituire protesi esistenti, le quali hanno avuto un esito negativo.
Nell’ambito del compito sopra esposto, uno scopo particolare del trovato è quello di realizzare una protesi femorale, che dia la possibilità di ancorarsi saldamente nell’osso, evitando eventuali rotazioni ed aumentando l’ancoraggio primario.
La presente protesi femorale, per le sue peculiari caratteristiche realizzative, è in grado di offrire le più ampie garanzie di affidabilità e di sicurezza nell’uso.
La presente protesi femorale è predisposta in modo da consentire una rapida e salda connessione agli strumenti, che vengono utilizzati durante le fasi di inserimento e di estrazione della protesi.
Il compito sopra esposto, nonché gli scopi accennati ed altri, che meglio appariranno evidenziati in seguito, vengono raggiunti da una protesi femorale, particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo, secondo il trovato, caratterizzata dal fatto di comprendere un corpo prossimale, amovibilmente accoppiabile ad un corpo distale o stelo, detto corpo prossimale presentando, all’estremità prossimale, una sezione sostanzialmente ellissoidale che si riduce ad una conformazione sostanzialmente circolare verso l’apice distale, ove è definita una sede conica di accoppiamento con il codolo conico dello stelo, detto stelo, in sezione trasversale, presentando una conformazione a stella con punte uniformemente distribuite.
Ulteriori caratteristiche e vantaggi dell’oggetto del presente trovato risulteranno maggiormente evidenziati attraverso un esame della descrizione di una forma di esecuzione preferita, ma non esclusiva, di una protesi femorale, particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo, illustrata a titolo indicativo, ma non limitativo, con l’ausilio dei disegni allegati, in cui:
la figura 1 rappresenta la protesi femorale, vista assemblata ed in alzato frontale;
la figura 2 rappresenta la protesi femorale, in vista prospettica esplosa;
la figura 3 rappresenta il corpo prossimale, in alzato frontale;
la figura 4 rappresenta il corpo prossimale, in alzato laterale;
la figura 5 rappresenta il corpo prossimale, visto in pianta da sopra;
la figura 6 rappresenta una sezione lungo la linea VI-VI di figura 5;
la figura 7 rappresenta una sezione lungo la linea VII-VII di figura 6;
le figure 8, 9 e 10 rappresentano il corpo distale o stelo in tre diverse lunghezze;
la figura 11 rappresenta una sezione lungo la linea XI-XI di figura 10;
la figura 12 rappresenta la protesi femorale, vista in esploso ed in sezione;
la figura 13 rappresenta la protesi montata con il corpo prossimale, visto in sezione.
Con particolare riferimento ai simboli numerici delle suddette figure, la presente protesi femorale, particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo, secondo il trovato, la quale viene indicata nella sua globalità con il numero di riferimento 1, risulta costituita da un corpo prossimale 2 e da uno stelo 3, amovibilmente accoppiabile al corpo prossimale.
Il corpo prossimale 2 presenta, in corrispondenza della sua estremità prossimale, una conformazione sostanzialmente ellissoidale, che si riduce verso l'apice distale, indicato con 4, ove presenta una conformazione sostanzialmente circolare.
In corrispondenza dell’apice 4, risulta definita una sede conica 5, in cui è accoppiabile il codolo conico 6 del corpo distale o stelo 3.
Il corpo 2 presenta, in corrispondenza della sua parte prossimale, e nella zona laterale, un’aletta 10, a sezione pressoché triangolare, la cui funzione è quella di impedire la rotazione ed aumentare l’ancoraggio primario.
Inoltre, in corrispondenza dell’aletta 10, è ricavato un foro passante 11, che consente il fissaggio dei fasci muscolari.
All’interno del corpo 2, in asse con la sede conica 5, è previsto un canale passante 12 che, verso l’estremità distale, è delimitato da un riscontro 13, mentre superiormente risulta prevista una sede filettata 14.
Nella sede filettata 14 è inseribile un tappo 15, che ha il compito di impedire l’ingresso di eventuali liquidi fisiologici, mentre il fissaggio con lo stelo 2 viene eseguito mediante una vite 16, che si inserisce nel canale 12, ed ha la sua testa che si impegna contro il riscontro 13,
Nella zona prossimale mediale, è prevista una sede ovale 18, in cui risulta accoppiabile il collo 19, al quale è collegabile una testa 20.
Il corpo prossimale 2 è previsto in più taglie. Il corpo distale o stelo viene vantaggiosamente previsto in tre diverse lunghezze, come è evidenziato nelle figure da 8 a 10, e precisamente nelle lunghezze "corto", "medio" e "lungo".
Ogni lunghezza è inoltre disponibile in taglie diverse.
Un’importante peculiarità del trovato è costituita dal fatto che lo stelo presenta, in sezione trasversale, una conformazione a stella, con punte che sono in numero variabile, in funzione della taglia dello stelo.
Nell’apice prossimale è previsto il codolo conico 6, il quale presenta un foro filettato 6a, in cui si impegna la vite 16.
Sulla superficie superiore del codolo conico, è, inoltre, prevista una scanalatura trasversale 21, che consente, mediante un opportuno strumento, il corretto posizionamento dello stelo all’interno del canale femorale.
Steli "corto" "medio" e "lungo" vengono realizzati predisponendo una porzione distale conica, indicata con 3a, che, a parità di taglia, è uguale per tutte le lunghezze, ed una porzione prossimale 3b, che, sempre a parità di taglia, è anch’essa uguale per tutte le lunghezze.
Negli steli "medio'' e "lungo'' viene prevista una porzione centrale cilindrica 3c, di differente lunghezza .
Inoltre lo stelo "lungo" ha una curvatura che consente un buon adattamento alla curvatura della diafisi femorale.
Con la struttura descritta, si ha quindi una protesi femorale che viene ottenuta con elementi modulari tra loro, facilmente assemblabili ed in grado di consentire al chirurgo di realizzare i dimensionamenti ottimali, in funzione delle varie morfologie del paziente.
Inoltre, l’aver previsto elementi modulari, tra loro rapidamente assemblabili, consente di ottenere una notevole versatilità, al momento dell’installazione .
Il trovato, così concepito, è suscettibile di subire numerose modifiche e varianti, tutte rientranti nell’ambito del concetto inventivo.
Inoltre, tutti i dettagli potranno essere sostituiti da altri elementi, tecnicamente equivalenti. In pratica, i materiali impiegati, nonché le dimensioni e le forme contingenti, potranno essere qualsiasi, a seconda delle esigenze.
Claims (9)
- R I V E N D I C A Z I O N I 1. Protesi femorale (1), particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo, caratterizzata dal fatto di comprendere un corpo prossimale (2) amovibilmente accoppiabile ad un corpo distale o stelo (3), detto corpo prossimale (2) presentando, all’estremità prossimale, una sezione sostanzialmente ellissoidale, che si riduce ad una conformazione sostanzialmente circolare verso l'apice distale (4), ove è definita una sede conica (5) per l’accoppiamento con il codolo conico (6) dello stelo, detto stelo, in sezione trasversale, presentando una conformazione a stella, con punte uniformemente distribuite.
- 2. Protesi femorale, secondo la rivendicazione precedente, caratterizzata dal fatto che il suddetto corpo prossimale presenta, in corrispondenza della zona prossimale-laterale, un’aletta (10) di sezione pressoché triangolare, che si sviluppa per un tratto longitudinale.
- 3. Protesi femorale, secondo una o più rivendicazioni precedenti, caratterizzata dal fatto che la suddetta aletta (10) presenta un foro passante (11).
- 4. Protesi femorale, secondo una o più rivendicazioni precedenti, caratterizzata dal fatto di comprendere, nel corpo prossimale (2), sul proseguimento della suddetta sede conica (5), un canale passante (12), per l’inserimento della vite (16) di accoppiamento con il codolo (6).
- 5. Protesi femorale, secondo una o più rivendicazioni precedenti, caratterizzata dal fatto che il suddetto canale passante (12), in corrispondenza dell’estremità prossimale, presenta una sede filettata (14), per l’impegno con il tappo (15).
- 6. Protesi femorale, secondo una o più rivendicazioni precedenti, caratterizzata dal fatto che il suddetto corpo prossimale (2) prevede nella zona mediale-prossimale, una sede ovale (18) per la connessione con un collo (19) a sua volta accoppiantesi con una testa (20).
- 7. Protesi femorale, secondo una o più rivendicazioni precedenti, caratterizzata dal fatto che il suddetto corpo distale o stelo (3) presenta una por— zione distale (3a), rastremamentesi verso l’apice distale ed uguale a parità di taglia per tutte le lunghezze di detto stelo.
- 8. Protesi femorale, secondo una o più rivendicazioni precedenti, caratterizzata dal fatto che il suddetto stelo (3) presenta una porzione prossimale (3b) uguale,a parità di taglia, per tutte le lunghezze dello stelo e che, in funzione di dette lunghezze, sono eventualmente previste porzioni centrali cilindriche (3c) di diversa lunghezza.
- 9. Protesi femorale particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo, secondo una o più rivendicazioni precedenti, il tutto come più ampiamente descritto ed illustrato e per gli scopi specificati.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI940496A IT1271759B (it) | 1994-03-17 | 1994-03-17 | Protesi femorale particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo |
DE69515072T DE69515072T2 (de) | 1994-03-17 | 1995-03-17 | Femurprothese zum Wiederherstellen einer Prothesenimplantation, die zu negativen Ergebnissen geführt hat |
EP95830097A EP0677281B1 (en) | 1994-03-17 | 1995-03-17 | Femoral prosthesis for recovering a prosthesis implantation which has provided negative results |
ES95830097T ES2143609T3 (es) | 1994-03-17 | 1995-03-17 | Protesis femoral para la recuperacion de una implantacion de protesis que ha suministrado resultados negativos. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI940496A IT1271759B (it) | 1994-03-17 | 1994-03-17 | Protesi femorale particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI940496A0 ITMI940496A0 (it) | 1994-03-17 |
ITMI940496A1 true ITMI940496A1 (it) | 1995-09-17 |
IT1271759B IT1271759B (it) | 1997-06-09 |
Family
ID=11368239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI940496A IT1271759B (it) | 1994-03-17 | 1994-03-17 | Protesi femorale particolarmente studiata per la revisione di impianti protesici che hanno avuto esito negativo |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0677281B1 (it) |
DE (1) | DE69515072T2 (it) |
ES (1) | ES2143609T3 (it) |
IT (1) | IT1271759B (it) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2730628B1 (fr) * | 1995-01-27 | 1997-09-12 | Amp Dev | Prothese femorale modulaire a geometrie variable, notamment de reconstruction |
DE19926391C1 (de) * | 1999-06-10 | 2001-02-01 | Aesculap Ag & Co Kg | Prothesenschaft |
AU9295001A (en) | 2000-09-20 | 2002-04-02 | Hayes Medical Inc | Modular prosthetic component with improved body shape |
FR2837695B1 (fr) * | 2002-03-28 | 2005-01-21 | Medical Solution | Tige femorale anatomique pour prothese de hanche |
US7235106B2 (en) | 2002-12-20 | 2007-06-26 | Depuy Products, Inc. | Modular hip stems and associated method of trialing |
ATE292433T1 (de) * | 2003-01-17 | 2005-04-15 | Link Waldemar Gmbh Co | Hüftprothese mit einem in den markkanal des oberschenkelknochens zu verankernden schaft |
CH696418A5 (it) * | 2003-06-20 | 2007-06-15 | Mariasal Invest Nv | Protesi d'anca. |
FR2875397B1 (fr) * | 2004-09-23 | 2007-11-02 | Genie Medical Sgm Sa Soc D | Tige femorale de reprise impactee sans ciment pour prothese de hanche |
FR2892922B1 (fr) * | 2005-11-08 | 2008-07-18 | Ortho I D Sarl | Implant trochanterien pour accrochage rapide du trochanter |
ITVI20060115A1 (it) | 2006-04-18 | 2007-10-19 | Plus Orthopedics Italy Srl | Protesi femorale |
WO2010122590A1 (en) * | 2009-04-20 | 2010-10-28 | Guido Grappiolo | Hip prosthesis |
FR2956804B1 (fr) * | 2010-03-01 | 2012-03-16 | C2F Implants | Gamme d'elements modulaires pour la constitution d'une tige femorale de prothese de hanche |
US20170367764A1 (en) * | 2015-01-16 | 2017-12-28 | Think Surgical, Inc. | Computer assisted implant placement |
EP3355833B1 (en) * | 2015-09-30 | 2023-01-11 | David Phillip Kirwan | Hip prosthesis |
WO2018218283A1 (en) * | 2017-06-01 | 2018-12-06 | Smartscrew Pty Ltd | Fastening system |
US11364125B2 (en) | 2019-07-08 | 2022-06-21 | Howmedica Osteonics Corp. | Tapered stem with anti-rotation features |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8408893U1 (de) * | 1984-03-23 | 1985-06-05 | orthoplant Endoprothetik GmbH, 2800 Bremen | Totalendoprothese für ein Hüftgelenk |
IT1213873B (it) * | 1987-08-03 | 1990-01-05 | Cremascoli Spa G | Struttura di protesi d'anca suscettibile di essere facilmente adattata alla particolare conformazione dell'articolazione coxo-femorale dei singoli pazienti |
DE3829361A1 (de) * | 1988-02-10 | 1989-08-24 | Orthoplant Endoprothetik | Einzementierbares oberschenkelteil einer hueftgelenk-endoprothese |
FR2629707A1 (fr) * | 1988-04-07 | 1989-10-13 | Roux Jean Pierre | Piece femorale et equipement pour la realisation d'une prothese de la hanche |
FR2640497B1 (fr) * | 1988-12-19 | 1997-10-03 | Mesguich Alain | Implant femoral pour prothese de hanche |
US5108452A (en) * | 1989-02-08 | 1992-04-28 | Smith & Nephew Richards Inc. | Modular hip prosthesis |
CA2084095C (en) * | 1990-06-01 | 2002-04-02 | David Clark Kelman | Metal/composite hybrid orthopedic implants |
DE9006893U1 (de) * | 1990-06-20 | 1990-08-23 | Howmedica GmbH, 2314 Schönkirchen | Oberschenkelteil einer Hüftgelenkendoprothese |
DE4320086C3 (de) * | 1993-06-17 | 2002-05-16 | Peter Brehm | Modularer Schaft für ein Revisionshüftprothesensystem |
IT1262759B (it) * | 1993-07-16 | 1996-07-04 | Mec Hint S R L | Perfezionamento al blocco tra i componenti di una protesi pluricomposta per l'impiego in traumatologia ortopedia e veterinaria |
-
1994
- 1994-03-17 IT ITMI940496A patent/IT1271759B/it active IP Right Grant
-
1995
- 1995-03-17 ES ES95830097T patent/ES2143609T3/es not_active Expired - Lifetime
- 1995-03-17 EP EP95830097A patent/EP0677281B1/en not_active Expired - Lifetime
- 1995-03-17 DE DE69515072T patent/DE69515072T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2143609T3 (es) | 2000-05-16 |
ITMI940496A0 (it) | 1994-03-17 |
EP0677281A3 (en) | 1996-02-28 |
EP0677281A2 (en) | 1995-10-18 |
IT1271759B (it) | 1997-06-09 |
DE69515072D1 (de) | 2000-03-23 |
EP0677281B1 (en) | 2000-02-16 |
DE69515072T2 (de) | 2000-06-21 |
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