IT202100005699A1 - Dispositivo intersomatico - Google Patents

Dispositivo intersomatico Download PDF

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Publication number
IT202100005699A1
IT202100005699A1 IT102021000005699A IT202100005699A IT202100005699A1 IT 202100005699 A1 IT202100005699 A1 IT 202100005699A1 IT 102021000005699 A IT102021000005699 A IT 102021000005699A IT 202100005699 A IT202100005699 A IT 202100005699A IT 202100005699 A1 IT202100005699 A1 IT 202100005699A1
Authority
IT
Italy
Prior art keywords
pin
elements
teeth
opening
nut screw
Prior art date
Application number
IT102021000005699A
Other languages
English (en)
Inventor
Raco Antonino Prof
Stefano Caselli
Miscusi Massimo Prof
Claudio Traverso
Original Assignee
Emmemme S R L S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Emmemme S R L S filed Critical Emmemme S R L S
Priority to IT102021000005699A priority Critical patent/IT202100005699A1/it
Priority to EP22714768.3A priority patent/EP4308045A1/en
Priority to PCT/EP2022/000026 priority patent/WO2022194420A1/en
Publication of IT202100005699A1 publication Critical patent/IT202100005699A1/it

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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/3094Designing or manufacturing processes
    • A61F2/30942Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30962Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using stereolithography
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/3094Designing or manufacturing processes
    • A61F2002/30985Designing or manufacturing processes using three dimensional printing [3DP]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2002/4495Joints for the spine, e.g. vertebrae, spinal discs having a fabric structure, e.g. made from wires or fibres

Description

DESCRIZIONE
Annessa a Domanda di Brevetto per invenzione Industriale avente per Titolo:
?DISPOSITIVO INTERSOMATICO?
DESCRIZIONE
L'invenzione riguarda un dispositivo intersomatico espandibile utilizzato per operazioni intersomatiche alla colonna vertebrale e appartiene al campo delle apparecchiature mediche.
Le patologie vertebrali hanno quale causa preminente la degenerazione dei dischi intervertebrali.
La diminuita capacit? del disco intervertebrale di assolvere ai propri compiti implica spesso la necessit? di intervenire sullo stesso con la conseguente possibile implicazione del danneggiamento del segmento di moto della colonna vertebrale.
Fra i trattamenti chirurgici per trattare detta degenerazione, oggi la metodica di riferimento ? la procedura di stabilizzazione vertebrale con artrodesi intersomatica, un intervento che mira a ristabilire la giusta distanza tra due o pi? dischi intervertebrali deteriorati che non sono pi? in grado di assolvere alla loro funzione.
La stabilizzazione intersomatica viene oggi ottenuta con metodiche chirurgiche differenti secondo il distretto anatomico interessato e la posizione della causa preminente del dolore. I dispositivi che vengono posti nello spazio intersomatico sono delle gabbiette di differenti materiali e forma.
L?inconveniente principale delle gabbiette risiede nel fatto che queste possono agire solo da spaziatori o da spaziatori/contenitori di sostanza atta alla stabilizzazione biologica del segmento sottoposto al trattamento.
Va anche detto che per alcune procedure chirurgiche vengono utilizzati dispositivi in grado di aumentare il loro ingombro in altezza, in quanto le gabbiette sono espandibili
Con lo scopo di ottimizzare l?area di contatto fra il dispositivo e il sito anatomico accogliente, l?invenzione concerne in un dispositivo che, mantenendo i presupposti di adeguatezza anatomica e meccanica, possa crescere di volume nello spazio intersomatico sino a coprire una area superiore dei piatti vertebrali accoglienti.
In aggiunta, l?espansione pu? avvenire sul piano anatomico trasverso, peculiarit? attualmente non disponibile nei dispositivi noti.
In maggior dettaglio, l?espansione del dispositivo potr? avvenire attraverso lo spostamento di sue componenti che possono reciprocamente scorrere ed allontanarsi una dall?altra per creare una maggiore copertura dello spazio intersomatico.
Grazie a detta caratteristica dell?invenzione, agli operatori sar? consentito effettuare approcci chirurgici minimamente invasivi altrimenti necessari per poter posizionare dispositivi intersomatici che debbano coprire un?area maggiore dei piatti vertebrali.
Alla peculiarit? ? quella che il dispositivo consente lo sviluppo sul piano coronale per poter eventualmente ottenere anche un migliore riempimento dello spazio di intervento.
Le caratteristiche dell?invenzione in oggetto risulteranno evidenti dalla seguente descrizione di preferite forme di realizzazione in accordo con quanto proposto nelle rivendicazioni e con l?ausilio delle allegate tavole di disegno, nelle quali:
- La figura 1 illustra il dispositivo oggetto dell?invenzione in configurazione chiusa, ossia compatta;
La figura 2 illustra il dispositivo oggetto dell'invenzione in configurazione espansa;
La figura 3 illustra, secondo una vista prospettica, il dispositivo di cui alle figure precedenti;
Le figure da 4 a 6 illustrano la sola struttura del dispositivo, per una migliore visualizzazione del meccanismo di azionamento.
Con riferimento alle figure indicate, si indica con 10 nel suo complesso, un dispositivo intersomatico espandibile costituito sostanzialmente da due elementi 20 e 30 mobili e reciprocamente scorrevoli; in tal modo il dispositivo 10, pur mantenendo i presupposti di adeguatezza anatomica e meccanica, pu? essere regolato in modo da crescere di volume nello spazio intersomatico sino a coprire una area superiore dei piatti vertebrali accoglienti.
Allo scopo, i due elementi 20 e 30 comprendono, rispettive porzioni di base 21, 31 configurate per l?appunto ad accrescere nello spazio intersomatico sino a coprire un?area superiore dei piatti vertebrali.
A ciascuna porzione di base 21, 32 sono associati uno o pi? prolungamenti, nel seguito definiti denti di scorrimento, configurati per l?appunto in modo da scorrere reciprocamente durante l?azionamento del dispositivo 10.
Pi? precisamente, nella forma d? realizzazione qui illustrata a titolo di esempio, la porzione base 21 ? provvista di un unico dente 22 che si protrae da essa ed ? atto ad essere alloggiato, in almeno una configurazione compatta del dispositivo 10, tra due corrispettivi denti 32 e 33 della porzione 30; resta intesto, tuttavia, che tale caratterizzazione sul numero dei denti non deve essere intesa come limitativa della protezione richiesta e altre forme equivalenti di realizzazione ovvie per un tecnico del settore formano parte dellambito di tutela della presente invenzione tutelate.
In buona sostanza, le porzioni 20 e 30 esse sono configurate per avvicinarsi e allontanarsi tra loro, anche supportate dai rispettivi denti di scorrimento 22, 32, 33, e da eventuali guide in seguito descritte; grazie a tale caratteristica il dispositivo 10 viene a trovarsi in due condizioni operative limite, ovvero:
una prima configurazione ?compatta" o chiusa dei dispositivo 10, in cui il primo elemento 20 ? pressoch? a contatto con il secondo elemento 30, ed uno o pi? denti del primo elemento 20 si trovano tra quelli del secondo elemento 30, una seconda configurazione ?estesa?, ossia aperta e di maggior volume, in cui il primo elemento 20 risulta distanziato dal secondo elemento 30, ovvero i denti del primo elemento 20 minimamente interferenti con quelli del secondo elemento 30.
In tal modo, il dispositivo 10 intersomat?co pu? passare dalla prima alla seconda configurazione, e viceversa; a tal riguardo, il dispositivo 10 viene agganciato ad uno strumento cosicch? una volta posizionato nello spazio intersomatico viene espanso orizzontalmente attraverso opportuno strumento dedicato che agisce su un meccanismo di regolazione 40, in seguito descritto, che genera l?allontanamento reciproco degli elementi e quindi l'apertura del dispositivo 10, cos? da riempire l?intero spazio intersomat?co.
Si osserva inoltre che il dispositivo 10 in configurazione ?compatta?, ossia chiusa, presenta le estremit? dei denti di un elemento pressoch? a contatto, o quanto meno in prossimit?, del lato interno della porzione di base dell?altro elemento, per ottenere il minimo ingombro del dispositivo stesso.
Come anticipato, secondo un aspetto vantaggioso dell?invenzione, il dispositivo 10 pu? comprendere uno o pi? perni 60 di guida, per una migliore azione di comando e stabilizzazione della configurazione ?estesa?.
Specificamente, nell?esempio illustrato si osserva la presenza di quattro perni 60 di stabilizzazione vincolati alla porzione di base 21 del corpo 20 e dalla quale si estendono linearmente, nella medesima direzione del dente 22 cosicch? ciascun perno 60 entra ed ? guidato da rispettivi fori ricavati nel corpo 30, precisamente nelle porzioni terminali dei denti 32 e 33.
Il passaggio dalla configurazione compatta a quella estesa (e viceversa) viene attuata, come anticipato, per mezzo di un meccanismo di regolazione 40 ospitato allinteno del dispositivo 10 configurato per cooperare con i rispettivi elementi 20 e 30 per il tramite d? una madrevite 50.
In maggior dettaglio, il meccanismo di regolazione 40 comprende un primo perno 41 filettato che viene collegato ad un secondo perno 42 per il tramite di un organo di trasmissione quale un cardano 70 che permette di trasmettere il moto tra i rispettivi due assi disallineati dei perni 41 e 42, i cui prolungamenti sono per l?appunto incidenti in un punto.
La filettatura del primo perno 41 si impegna nella corrispondente madrevite 50 solidale ad uno dei due elemento del dispositivo, mentre il secondo perno 42 ? solidale all?altro elemento essendo ospitato in un foro 80 circolare di alloggiamento che ne consente la sola rotazione sul proprio asse.
Vantaggiosamente gli assi dei due perni 41 e 42 sono disposti su un medesimo piano che corrisponde al piano di scorrimento degli elementi 20 e 30, ovvero di apertura del dispositivo 10.
Perno 41 e madrevite 50 sono disposti in modo che l?asse di rotazione risulti coincidente con la direzione di apertura/chiusura del dispositivo 10.
Il secondo perno 42, che risulta incidente rispetto al primo perno e inclinato di un angolo variabile d? circa 45?, comprende una sede 43 a geometr?a anti rotazionale ricavata all?interno della porzione di testa; tramite la sede ? consentito l'accoppiamento con uno strumento di comando (non illustrato per un?agevole apertura/chiusura del dispositivo 10.
METODO DI REALIZZAZIONE PREFERITO DEL DISPOSITIVO
Secondo un aspetto vantaggioso dell'invenzione, il meccanismo di apertura 40 per l'apertura del dispositivo 10 ? realizzato in un unico pezzo e non ? assemblato ma realizzato tramite sinterizzazione in titanio gi? assemblato con il movimento calibrato.
Sempre per sinterizzazione sono realizzati anche gli elementi 20 e 30 del dispositivo 10; essi sono costituiti da uno scheletro strutturale che ripercorre essenzialmente i contorni dei vari elementi, ?alleggerita" sia al suo interno (in quanto gli elementi sono cavi), ma anche in superficie per la presenza di una trama reticolare che garantisce un'elevata resistenza meccanica con l?impegno di meno materiale ed una migliorata stabilit? biomeccanica del dispositivo intersomatico.
FUNZIONAMENTO DEL DISPOSITIVO
Il dispositivo 10 intersomatico ad espansione viene azionato da un porta impianti, vale a dire uno strumento chirurgico, sul quale si aggancia mediante il suo foro 90 di fissaggio filettato.
Attraverso una procedura chirurgica denominata OLIF (oblique lumbar interbodi fusion) accede allo spazio intersomatico lombare.
Una volta posizionata il dispositivo 10 all'interno dello spazio intersomatico, questo viene espanso attraverso lo strumento chirurgico dedicato, che si aggancia nella sede 43 esagonale accanto al foro d? fissaggio filettato; attraverso una rotazione in senso orario del manipolo, si genera l?apertura del dispositivo 10 che in tal modo va a riempire l?intero spazio intersomatico.

Claims (4)

RIVENDICAZIONI
1. Dispositivo (10), in particolare per stabilizzazione vertebrale intersomatico, caratterizzato dal fatto di comprendere almeno due corpi (20, 30) reciprocamente scorrevoli uno nell?altro e cooperanti in modo da crescere di volume nello spazio intersomatico sino a coprire una area superiore dei piatti vertebrali accoglienti; e in cui un meccanismo di regolazione (40) interagisce con detti corpi (20, 30) per definire:
a. una prima condizione ?compatta? o chiusa in cui il dispositivo (10) reca i denti del primo elemento (20) tra quelli del secondo elemento (30), o viceversa, e
b. una seconda configurazione ?estesa?, ossia aperta e di maggior volume, in cui i denti del primo elemento (20) sono spostati e minimamente interferenti con quelli del secondo elemento (30).
2. Dispositivo (10), secondo la rivendicazione 1 in cui il meccanismo di regolazione (40)
a. ? ospitato all?interno del dispositivo (10) ed ? configurato per cooperare con i rispettivi elementi (20) e (30) per il tramite di una madrevite (50) solidale ad uno di detti elementi (20, 30);
b. comprende un primo perno (41) ed un secondo perno (42) collegati tra loro per il tramite di un organo di trasmissione quale un cardano (70) che permette di trasmettere il moto tra gli assi disallineati dei perni (41) e (42)
ed in cui il primo perno (41) ? dotato di filettatura atta a impegnare la corrispondente madrevite (50), ed il secondo perno (42) ? ospitato in un foro (80) circolare di alloggiamento che ne consente la sola rotazione sul proprio asse.
3. Dispositivo (10), secondo la rivendicazione 1 in cui gli assi dei due perni (41) e (42) sono disposti su un medesimo piano che corrisponde al piano di scorrimento degli elementi (20) e (30), ovvero di apertura del dispositivo (10) ed il perno (41) e madrevite (50) essendo disposti con asse di rotazione coincidente con detta direzione di apertura.
4. Dispositivo (10), secondo la rivendicazione 1 in cui il secondo perno (42) comprende una sede (43) a geometria anti rotazionale ricavata all?interno della porzione di testa.
5, Dispositivo (10), secondo la rivendicazione 1 in cui il meccanismo di apertura 40 ? realizzato in un unico pezzo e non ? assemblato ma realizzato tramite sinterizzazione in titanio gi? assemblato con il movimento calibrato.
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EP22714768.3A EP4308045A1 (en) 2021-03-18 2022-03-11 Interbody device
PCT/EP2022/000026 WO2022194420A1 (en) 2021-03-18 2022-03-11 Interbody device

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Citations (7)

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Publication number Priority date Publication date Assignee Title
WO2005112834A2 (en) * 2004-05-12 2005-12-01 Moskowitz Nathan C 3-d expansile intervertebral disc implant
WO2016049784A1 (en) * 2014-09-29 2016-04-07 Startech Engineering Ag Expandable spinal implant
WO2017004503A1 (en) * 2015-07-02 2017-01-05 DePuy Synthes Products, Inc. Expandable implant
US20180116819A1 (en) * 2016-11-01 2018-05-03 DePuy Synthes Products, Inc. Curved expandable cage
DE102018206693B3 (de) * 2018-05-01 2019-02-14 I-Pego Ug (Haftungsbeschränkt) Platzhalter für die Wirbelsäulenchirurgie
WO2019169302A1 (en) * 2018-03-01 2019-09-06 Integrity Implants Inc. Expandable fusion device with independent expansion systems
US20200383798A1 (en) * 2013-03-13 2020-12-10 Life Spine, Inc. Expandable implant assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005112834A2 (en) * 2004-05-12 2005-12-01 Moskowitz Nathan C 3-d expansile intervertebral disc implant
US20200383798A1 (en) * 2013-03-13 2020-12-10 Life Spine, Inc. Expandable implant assembly
WO2016049784A1 (en) * 2014-09-29 2016-04-07 Startech Engineering Ag Expandable spinal implant
WO2017004503A1 (en) * 2015-07-02 2017-01-05 DePuy Synthes Products, Inc. Expandable implant
US20180116819A1 (en) * 2016-11-01 2018-05-03 DePuy Synthes Products, Inc. Curved expandable cage
WO2019169302A1 (en) * 2018-03-01 2019-09-06 Integrity Implants Inc. Expandable fusion device with independent expansion systems
DE102018206693B3 (de) * 2018-05-01 2019-02-14 I-Pego Ug (Haftungsbeschränkt) Platzhalter für die Wirbelsäulenchirurgie

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