ITMI20110121A1 - IMPROVED MODULAR NECK, PARTICULARLY FOR HIP PROSTHESIS. - Google Patents
IMPROVED MODULAR NECK, PARTICULARLY FOR HIP PROSTHESIS. Download PDFInfo
- Publication number
- ITMI20110121A1 ITMI20110121A1 IT000121A ITMI20110121A ITMI20110121A1 IT MI20110121 A1 ITMI20110121 A1 IT MI20110121A1 IT 000121 A IT000121 A IT 000121A IT MI20110121 A ITMI20110121 A IT MI20110121A IT MI20110121 A1 ITMI20110121 A1 IT MI20110121A1
- Authority
- IT
- Italy
- Prior art keywords
- modular neck
- modular
- platforms
- neck
- distal portion
- Prior art date
Links
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 210000001624 hip Anatomy 0.000 description 5
- 230000003116 impacting effect Effects 0.000 description 3
- 241001227561 Valgus Species 0.000 description 1
- 241000469816 Varus Species 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 210000002436 femur neck Anatomy 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000004197 pelvis Anatomy 0.000 description 1
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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
-
- 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
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—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
- 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
-
- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3625—Necks
- A61F2002/3627—Necks with lateral apertures, holes or openings
-
- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3625—Necks
- A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
-
- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3652—Connections of necks to shafts
Description
"COLLO MODULARE PERFEZIONATO, PARTICOLARMENTE PER PROTESI DELL'ANCA" "PERFECTED MODULAR NECK, PARTICULARLY FOR HIP PROSTHESES"
D E S C R I Z I O N E DESCRIPTION
Il presente trovato riguarda un collo modulare perfezionato, particolarmente per protesi dell'anca. Più particolarmente, il trovato riguarda un collo modulare atto ad essere accoppiato con un relativo stelo, per impiego in protesi dell'anca. The present invention relates to an improved modular neck, particularly for hip prostheses. More particularly, the invention relates to a modular neck adapted to be coupled with a relative stem, for use in hip prostheses.
Come è noto, una protesi dell'anca comprende uno stelo femorale atto ad essere inserito nel canale femorale; detto stelo femorale, per essere utilizzato con un collo modulare, deve essere eprovvisto di una cava entro la quale viene inserito il collo modulare il quale a sua volta è provvisto di una parte aerea, ossia una parte che sporge dalla cava dello stelo femorale, e destinata a raggiungere un determinato punto nello spazio, per l'accoppiamento, tramite una testa, con un cotile che viene fissato nel bacino in modo da ripristinare correttamente l'articolazione dell 'anca. As is known, a hip prosthesis comprises a femoral stem adapted to be inserted into the femoral canal; said femoral stem, in order to be used with a modular neck, must be provided with a groove into which the modular neck is inserted which in turn is provided with an aerial part, i.e. a part that protrudes from the groove of the femoral stem, and designed to reach a certain point in space, for coupling, through a head, with a cup that is fixed in the pelvis in order to correctly restore the hip joint.
L'accoppiamento del collo modulare e della cava dello stelo femorale, avviene incastrando il collo modulare entro la suddetta cava. In particolare, l'operazione di accoppiamento viene eseguita andando ad impattare sulla parte aerea prossimale del collo modulare, in modo da accoppiarlo ad interferenza entro la cava dello stelo femorale. The coupling of the modular neck and the hollow of the femoral stem takes place by fitting the modular neck into the aforementioned hollow. In particular, the coupling operation is performed by impacting on the proximal aerial part of the modular neck, so as to couple it by interference within the groove of the femoral stem.
Tale azione di impattamento viene realizzata quindi agendo su una parte del collo modulare che solo raramente risulta essere in asse con l'asse di accoppiamento. Ciò determina il fatto che l'azione di impattamento contro la parte aerea del collo modulare fa sì che quest'ultimo vada ad inserirsi nella cava secondo un'angolazione non corretta, andando quindi a mettere a repentaglio l'accuratezza dell'accoppiamento, la precisione di accoppiamento e in definitiva la durata stessa della protesi. This impacting action is therefore carried out by acting on a part of the modular neck which only rarely appears to be in axis with the coupling axis. This determines the fact that the impact action against the aerial part of the modular neck causes the latter to enter the groove according to an incorrect angle, thus jeopardizing the accuracy of the coupling, the precision of coupling and ultimately the duration of the prosthesis itself.
Compito precipuo del presente trovato è quello di realizzare un collo modulare che possa essere agevolmente inserito nella cava di uno stelo femorale ottenendo un accoppiamento ottimale tra collo e stelo. The aim of the present invention is to provide a modular neck which can be easily inserted in the hollow of a femoral stem, obtaining an optimal coupling between the neck and the stem.
Nell'ambito di questo compito, uno scopo del presente trovato è quello di realizzare un collo modulare in cui l'azione di impattamento sul collo femorale per il suo impeqno entro la cava possa avvenire secondo la direzione dell'asse di accoppiamento . Within the scope of this aim, an object of the present invention is to provide a modular neck in which the impact action on the femoral neck for its engagement within the groove can take place according to the direction of the coupling axis.
Non ultimo scopo del presente trovato è quello di realizzare un collo modulare che sia di elevata affidabilità, di relativamente semplice realizzazione ed a costi competitivi. Not least object of the present invention is to provide a modular package which is highly reliable, relatively simple to manufacture and at competitive costs.
Questo compito, nonché questi ed altri scopi che meqlio appariranno in sequito, sono raqqiunti da un collo modulare, particolarmente per protesi dell'anca, comprendente una porzione distale atta ad impeqnarsi in una cava di uno stelo femorale, una porzione intermedia connessa a detta porzione distale e avente un asse differentemente anqolato rispetto all'asse di detta porzione distale, ed una porzione prossimale, caratterizzato dal fatto di comprendere, tra detta porzione distale e detta porzione intermedia, una reqione di impeqno per consentire l'appoggio di uno strumentario atto ad esercitare una forza di impatto sul collo modulare per inserirlo entro detta cava dello stelo femorale . This task, as well as these and other purposes which will better appear in the following, are achieved by a modular neck, particularly for hip prostheses, comprising a distal portion adapted to engage in a hollow of a femoral stem, an intermediate portion connected to said portion distal and having an axis differently anqulated with respect to the axis of said distal portion, and a proximal portion, characterized in that it comprises, between said distal portion and said intermediate portion, an engagement region to allow the support of an instrument set suitable for exert an impact force on the modular neck to insert it into said groove of the femoral stem.
Ulteriori caratteristiche e vantaggi del trovato risulteranno maggiormente dalla descrizione di una forma di realizzazione preferita, ma non esclusiva, del collo modulare secondo il trovato, in cui: Further characteristics and advantages of the invention will become clearer from the description of a preferred but not exclusive embodiment of the modular neck according to the invention, in which:
la figura 1 illustra in vista prospettica il collo modulare secondo il presente trovato; Figure 1 is a perspective view of the modular package according to the present invention;
la figura 2 illustra in vista prospettica, da un lato opposto rispetto alla figura 1, il collo modulare secondo il trovato; e Figure 2 is a perspective view, from a side opposite to Figure 1, of the modular package according to the invention; And
la figura 3 illustra in vista in pianta dal basso il collo modulare secondo il presente trovato; e Figure 3 is a bottom plan view of the modular package according to the present invention; And
la figura 4 illustra uno strumentario atto a impattare il collo modulare secondo il trovato per il suo impegno entro la cava dello stelo femorale. Figure 4 illustrates an instrument set suitable for impacting the modular neck according to the invention for its engagement within the groove of the femoral stem.
Con riferimento alle figure, il collo modulare secondo il trovato, globalmente indicato dal numero di riferimento 1, comprende una porzione distale 2 atta ad essere impegnata nella cava di uno stelo femorale, una porzione 3 avente un asse con angolazione di norma differente rispetto all'asse della porzione distale 2, ed una porzione prossimale 4 che costituisce la porzione aerea del collo, ossia la porzione che è destinata ad impegnarsi con un cotile. With reference to the figures, the modular neck according to the invention, globally indicated by the reference number 1, comprises a distal portion 2 able to be engaged in the hollow of a femoral stem, a portion 3 having an axis with a normally different angle with respect to the axis of the distal portion 2, and a proximal portion 4 which constitutes the aerial portion of the neck, ie the portion which is intended to engage with a cup.
La peculiarità del trovato consiste nel fatto che tra la porzione distale 2 e la porzione 3 intermedia, ossia in corrispondenza della regione in cui l'asse del cotile cambia angolazione, è presente una regione di impegno 5, sporgente dal corpo del collo modulare e che costituisce una regione che permette di andare ad impattare con lo strumentario apposito, il collo modulare in modo da impegnarlo nella cava dello stelo femorale. The peculiarity of the invention consists in the fact that between the distal portion 2 and the intermediate portion 3, i.e. in correspondence with the region in which the axis of the cup changes angle, there is an engagement region 5, protruding from the body of the modular neck and which constitutes a region that allows the modular neck to be impacted with the appropriate instrumentation in order to engage it in the hollow of the femoral stem.
In dettaglio, la regione di impegno 5 è costituita da una piattaforma sporgente dal corpo del collo modulare, presente su entrambe le facce del collo modulare, ossia il collo modulare presenta due regioni 5 disposte sostanzialmente contrapposte, con una delle regioni 5 che può presentare uno smanco 6, utile per determinare la posizione in varo o in valgo del collo modulare. In detail, the engagement region 5 consists of a platform protruding from the body of the modular neck, present on both faces of the modular neck, i.e. the modular neck has two regions 5 arranged substantially opposite each other, with one of the regions 5 which can have one smanco 6, useful for determining the varus or valgus position of the modular neck.
Opportunamente, le regioni 5 sono sostanzialmente sagomate a forma trapezoidale, per rimanere entro gli ingombri del collo modulare, e non sporgere quindi lateralmente, ma soltanto in corrispondenza di una regione mediana del collo modulare, in modo da permettere di esercitare un'azione di pressione del collo modulare entro la cava dello stelo femorale. Conveniently, the regions 5 are substantially shaped in a trapezoidal shape, to remain within the overall dimensions of the modular neck, and therefore do not protrude laterally, but only in correspondence with a median region of the modular neck, so as to allow to exert a pressure action of the modular neck within the groove of the femoral stem.
Le due regioni di impegno o piattaforme 5 permettono dunque di costituire delle sedi su cui andare a "martellare" per poter inserire il collo modulare entro la cava dello stelo femorale. The two engagement regions or platforms 5 therefore make it possible to form seats on which to "hammer" in order to insert the modular neck into the groove of the femoral stem.
Il trovato prevede quindi inoltre uno strumentario atto ad impegnarsi con le regioni di impegno 5 o piattaforme, in modo da poter esercitare un'azione di pressione sul collo modulare . The invention therefore also provides an instrument set capable of engaging with the engagement regions 5 or platforms, so as to be able to exert a pressure action on the modular neck.
La figura 4 illustra lo strumentario, costituito da uno stelo 6 provvisto ad un'estremità di un'impugnatura 7 e all'estremità opposta di una coppia di bracci 8a ed 8b sagomati in modo da andare ad impegnarsi, con una regione a dente 9, con le regioni di impegno o piattaforme 5 del collo modulare . Figure 4 illustrates the instrument set, consisting of a stem 6 provided at one end with a handle 7 and at the opposite end with a pair of arms 8a and 8b shaped so as to engage, with a tooth region 9, with engagement regions or platforms 5 of the modular neck.
In tal modo, l'azione di martellamento del collo modulare entro la cava dello stelo femorale può essere esercitata andando ad agire lungo l'asse della porzione distale, a prescindere dall'inclinazione dell'asse della porzione intermedia 3 rispetto alla porzione distale 2. In this way, the hammering action of the modular neck within the groove of the femoral stem can be exerted by acting along the axis of the distal portion, regardless of the inclination of the axis of the intermediate portion 3 with respect to the distal portion 2.
Quindi, l'azione di martellamento sull'impugnatura 7 dello strumentario, indicato globalmente dal numero di riferimento 10, avviene secondo l'asse desiderato. Therefore, the hammering action on the handle 7 of the instruments, globally indicated by the reference number 10, takes place according to the desired axis.
Si è in pratica constatato come il collo modulare secondo il trovato assolva pienamente il compito nonché gli scopi prefissati, in quanto permette di essere impegnato nella cava dello stelo femorale andando ad agire sulla porzione del collo in modo tale che l'azione di impattamento contro il collo avvenga esattamente lungo l'asse della porzione distale del collo ossia la porzione che entra nella cava dello stelo femorale. In practice it has been found that the modular neck according to the invention fully achieves the intended aim and objects, since it allows it to be engaged in the groove of the femoral stem by acting on the portion of the neck in such a way that the impact action against the neck occurs exactly along the axis of the distal portion of the neck, i.e. the portion that enters the groove of the femoral stem.
Il collo modulare così concepito è suscettibile di numerose modifiche e varianti, tutte rientranti nell'ambito del concetto inventivo; inoltre tutti i dettagli potranno essere sostituti da altri elementi tecnicamente equivalenti . The modular neck thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept; furthermore, all the details may be replaced by other technically equivalent elements.
In pratica, i materiali impiegati, nonché le dimensioni e le forme contingenti, potranno essere qualsiasi secondo le esigenze e lo stato della tecnica . In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements and to the state of the art.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000121A ITMI20110121A1 (en) | 2011-02-01 | 2011-02-01 | IMPROVED MODULAR NECK, PARTICULARLY FOR HIP PROSTHESIS. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000121A ITMI20110121A1 (en) | 2011-02-01 | 2011-02-01 | IMPROVED MODULAR NECK, PARTICULARLY FOR HIP PROSTHESIS. |
Publications (1)
Publication Number | Publication Date |
---|---|
ITMI20110121A1 true ITMI20110121A1 (en) | 2012-08-02 |
Family
ID=43976030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT000121A ITMI20110121A1 (en) | 2011-02-01 | 2011-02-01 | IMPROVED MODULAR NECK, PARTICULARLY FOR HIP PROSTHESIS. |
Country Status (1)
Country | Link |
---|---|
IT (1) | ITMI20110121A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4642121A (en) * | 1984-09-14 | 1987-02-10 | Waldemar Link Gmbh & Co | Joint endoprosthesis and instrument for knocking it in or out |
US4822370A (en) * | 1986-01-14 | 1989-04-18 | Orthoplant Endoprothetik | Hip joint femoral prosthesis |
US5702485A (en) * | 1992-11-20 | 1997-12-30 | Burke; Dennis W. | Collared prosthetic device with centering fins |
DE19951141A1 (en) * | 1999-10-23 | 2001-05-10 | Corimed Kundenorientierte Medi | Hip joint endoprosthesis has shaft, neck-piece, link connection and spherical bone-head |
-
2011
- 2011-02-01 IT IT000121A patent/ITMI20110121A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4642121A (en) * | 1984-09-14 | 1987-02-10 | Waldemar Link Gmbh & Co | Joint endoprosthesis and instrument for knocking it in or out |
US4822370A (en) * | 1986-01-14 | 1989-04-18 | Orthoplant Endoprothetik | Hip joint femoral prosthesis |
US5702485A (en) * | 1992-11-20 | 1997-12-30 | Burke; Dennis W. | Collared prosthetic device with centering fins |
DE19951141A1 (en) * | 1999-10-23 | 2001-05-10 | Corimed Kundenorientierte Medi | Hip joint endoprosthesis has shaft, neck-piece, link connection and spherical bone-head |
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