IT201800009553A1 - METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED BY THIS METHOD - Google Patents
METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED BY THIS METHOD Download PDFInfo
- Publication number
- IT201800009553A1 IT201800009553A1 IT102018000009553A IT201800009553A IT201800009553A1 IT 201800009553 A1 IT201800009553 A1 IT 201800009553A1 IT 102018000009553 A IT102018000009553 A IT 102018000009553A IT 201800009553 A IT201800009553 A IT 201800009553A IT 201800009553 A1 IT201800009553 A1 IT 201800009553A1
- Authority
- IT
- Italy
- Prior art keywords
- screw
- screws
- surface layer
- powder
- intraosseous
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 39
- 239000000843 powder Substances 0.000 claims description 29
- 239000002344 surface layer Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 10
- 238000011282 treatment Methods 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 238000010309 melting process Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 description 5
- 238000000110 selective laser sintering Methods 0.000 description 4
- 239000004053 dental implant Substances 0.000 description 3
- 239000007943 implant Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010883 osseointegration Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/64—Treatment of workpieces or articles after build-up by thermal means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
- A61C8/0013—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy with a surface layer, coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0037—Details of the shape
- A61C2008/0046—Textured surface, e.g. roughness, microstructure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
- B22F12/43—Radiation means characterised by the type, e.g. laser or electron beam pulsed; frequency modulated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Thermal Sciences (AREA)
- Plasma & Fusion (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Ceramic Engineering (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Description
Descrizione del brevetto per Invenzione Industriale dal titolo: Description of the patent for Industrial Invention entitled:
"METODO PER LA REALIZZAZIONE DI VITI PER FISSAZIONI INTRAOSSEE E VITI OTTENUTE CON TALE METODO” "METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED WITH THIS METHOD"
La presente invenzione opera nel campo dell’industria biomedicale e riguarda la realizzazione di viti per fissazioni intraossee che trovano particolare applicazione nell’implantologia osteointegrata in campo ortopedico e dentale. The present invention operates in the field of the biomedical industry and concerns the production of screws for intraosseous fixations that find particular application in osseointegrated implantology in the orthopedic and dental fields.
La produzione di viti per fissazioni intraossee è ottenuta usualmente lavorando barre o piastre di titanio, tramite macchine a controllo numerico di precisione. The production of screws for intraosseous fixation is usually obtained by working titanium bars or plates, using precision numerical control machines.
Il titanio, puro o in lega, è infatti un materiale che viene utilizzato in questo campo per le buone proprietà meccaniche e per le caratteristiche di biocompatibilità con l’organismo ricevente. Titanium, pure or in alloy, is in fact a material that is used in this field for its good mechanical properties and for the characteristics of biocompatibility with the recipient organism.
Al fine di favorire il processo di osteointegrazione e garantire quindi risultati più duraturi, la superficie della vite viene sottoposta a specifici trattamenti o ad applicazione di rivestimenti. In order to favor the osseointegration process and therefore guarantee longer lasting results, the surface of the screw is subjected to specific treatments or to the application of coatings.
È noto un trattamento, chiamato sabbiatura, che, con l’obiettivo di incrementare la superficie dell’impianto in contatto con l’osso, permette di modificare lo strato superficiale della vite aumentandone la rugosità. Il trattamento consiste nel bombardare la superficie con particelle atte a creare micro-cavità di varie dimensioni. Un inconveniente di tale trattamento deriva dal fatto che le particelle con cui il substrato viene colpito possono restare ancorate alla superficie della vite e, in tal caso, se rilasciate nell’organismo ricevente possono compromettere il successo dell’impianto. Per minimizzare la presenza di particelle sulle superfici trattate, dopo la sabbiatura devono quindi essere eseguite ulteriori lavorazioni, ad esempio un trattamento con acidi. A treatment is known, called sandblasting, which, with the aim of increasing the surface of the implant in contact with the bone, allows the surface layer of the screw to be modified by increasing its roughness. The treatment consists in bombarding the surface with particles capable of creating micro-cavities of various sizes. A drawback of this treatment derives from the fact that the particles with which the substrate is hit can remain anchored to the surface of the vine and, in this case, if released into the recipient organism they can compromise the success of the implant. In order to minimize the presence of particles on the treated surfaces, further processing must therefore be carried out after sandblasting, for example a treatment with acids.
Sono noti anche metodi per la realizzazione di impianti dentali porosi che utilizzano il processo di Sinterizzazione Laser Selettiva (SLS) di polveri di titanio o sue leghe. Methods are also known for making porous dental implants that use the Selective Laser Sintering (SLS) process of titanium powders or its alloys.
US2004/0191106 utilizza il processo di sinterizzazione per realizzare una protesi porosa depositando strati di polvere di titanio su un nucleo preesistente. US2004 / 0191106 uses the sintering process to make a porous prosthesis by depositing layers of titanium powder on a pre-existing core.
US2001/005797 insegna a realizzare un impianto dentale, dotato di opportune cavità, depositando in successione stati di polvere del materiale di interesse e sinterizzando ognuno di essi. US2001 / 005797 teaches how to make a dental implant, equipped with suitable cavities, by depositing in succession states of powder of the material of interest and sintering each of them.
Gli oggetti realizzati con tale procedimento hanno però lo svantaggio di presentare delle microporosità strutturali che portano ad elevati rischi di fratture, in quanto il processo di Sinterizzazione Laser Selettiva può compattare la polvere metallica senza fonderla completamente. The objects made with this procedure, however, have the disadvantage of presenting structural microporosities which lead to high risk of fractures, as the Selective Laser Sintering process can compact the metal powder without melting it completely.
Inoltre, anche questo metodo richiede la rimozione della polvere che si deposita sulla superficie della vite alla fine del processo produttivo. Furthermore, this method also requires the removal of the dust that settles on the surface of the screw at the end of the production process.
Ulteriore svantaggio della tecnica nota deriva dal fatto che impiegando macchine laser di tipo SLS la varietà di materiali utilizzabili è ridotta. Infatti, generalmente si preferisce l’utilizzo di leghe al materiale puro poiché i risultati ottenuti con quest’ultimo sono meccanicamente e strutturalmente inferiori. A further disadvantage of the known art derives from the fact that by using laser machines of the SLS type the variety of usable materials is reduced. In fact, the use of alloys is generally preferred to pure material since the results obtained with the latter are mechanically and structurally inferior.
Scopo della presente invenzione è realizzare un metodo per la produzione di viti per fissazioni intraossee che permetta la perfetta fusione delle polveri metalliche utilizzate, creando un corpo compatto ma dotato di microcavità sullo strato superficiale, con migliorata resistenza meccanica rispetto alle viti prodotte secondo la tecnica nota. The purpose of the present invention is to provide a method for the production of screws for intraosseous fixations that allows the perfect fusion of the metal powders used, creating a compact body but equipped with microcavities on the surface layer, with improved mechanical resistance compared to the screws produced according to the known technique. .
Ulteriore scopo dell’invenzione è quello di fornire un metodo che eviti il deposito di residui di particelle di materiale non fuso alla fine del processo di lavorazione, eliminando quindi la necessità di mettere in atto ulteriori trattamenti per rimuovere le polveri superficiali. A further purpose of the invention is to provide a method that avoids the deposit of residual particles of non-melted material at the end of the manufacturing process, thus eliminating the need to implement further treatments to remove surface dust.
Gli scopi specificati vengono raggiunti con un metodo atto alla produzione di viti per fissazioni intraossee che comprende un processo di fusione laser di strati di polvere metallica ed un trattamento in forno a microonde così come indicato nella rivendicazione 1, che si intende qui riportata. The specified purposes are achieved with a method suitable for the production of screws for intraosseous fixations which comprises a process of laser melting of layers of metal powder and a treatment in a microwave oven as indicated in claim 1, which is intended to be reported here.
Ulteriori caratteristiche vantaggiose dell’invenzione sono descritte nelle rivendicazioni dipendenti. Further advantageous features of the invention are described in the dependent claims.
Le viti per fissazioni intraossee prodotte col metodo secondo l’invenzione possono avere qualsiasi forma, anche geometricamente complessa, in funzione del tipo di applicazione richiesta. The screws for intraosseous fixations produced with the method according to the invention can have any shape, even geometrically complex, depending on the type of application required.
Ulteriore vantaggio dell’invenzione, che prevede preferibilmente di utilizzare il processo di fusione laser selettiva o Selective Laser Melting (SLM), atto a fondere le polveri in una massa omogenea, è la possibilità di utilizzare materiali puri e non solo leghe come nei procedimenti che utilizzano processi di sinterizzazione. Inoltre, il metodo secondo l’invenzione consente di controllare e sfruttare i residui di polvere per ottenere, col trattamento in forno a microonde, la formazione di micro-cavità atte a favorire il processo di osteointegrazione dell’impianto. A further advantage of the invention, which preferably provides for the use of the selective laser melting or Selective Laser Melting (SLM) process, suitable for melting the powders into a homogeneous mass, is the possibility of using pure materials and not only alloys as in the procedures that they use sintering processes. Furthermore, the method according to the invention allows to control and exploit the residues of powder to obtain, with the treatment in a microwave oven, the formation of micro-cavities designed to favor the osseointegration process of the implant.
Il metodo per la fabbricazione di viti per fissazioni intraossee secondo l’invenzione comprende essenzialmente le seguenti fasi: The method for manufacturing screws for intraosseous fixations according to the invention essentially comprises the following steps:
- in una macchina di tipo SLM, si deposita in modo noto un sottile strato di polvere metallica e il fascio laser, preferibilmente regolato alla potenza nominale dello strumento, provoca la completa fusione della polvere; - si ripete il procedimento in sequenza, fondendo strati di polvere, sovrapposti dal dispositivo opportunamente programmato, fino a raggiungere il parziale completamento del corpo della vite, ma fermandosi ad una distanza prestabilita dal bordo esterno indicativamente compresa tra 100 e 200 micron; - in a machine of the SLM type, a thin layer of metal powder is deposited in a known way and the laser beam, preferably adjusted to the nominal power of the instrument, causes the complete melting of the powder; - the procedure is repeated in sequence, melting layers of powder, superimposed by the suitably programmed device, until the partial completion of the screw body is reached, but stopping at a predetermined distance from the outer edge, approximately between 100 and 200 microns;
- si procede quindi al completamento della forma programmata diminuendo linearmente la potenza del laser, approssimativamente dal 60% al 5% del valore nominale o del valore di fusione impostato, in modo che lo strato superficiale, sottoposto all’azione del fascio laser di potenza ridotta, presenti inclusioni di polvere di materiale non fuso; - the programmed shape is then completed by linearly decreasing the laser power, approximately from 60% to 5% of the nominal value or of the set fusion value, so that the surface layer, subjected to the action of the reduced power laser beam , with inclusions of powder of non-melted material;
- si tratta il prodotto in un forno a microonde al fine di innescare la polvere non fusa facendola esplodere e generando nello strato superficiale cavità interconnesse. - the product is treated in a microwave oven in order to ignite the unfused powder by making it explode and generating interconnected cavities in the surface layer.
Si verifica che il metodo secondo l’invenzione permette di creare sulla superficie della vite cavità interconnesse di dimensioni variabili tra 5 e 300 micron, in funzione della tipologia e granulometria di polvere utilizzata. It is verified that the method according to the invention allows the creation of interconnected cavities on the surface of the screw of variable dimensions between 5 and 300 microns, depending on the type and particle size of powder used.
L’invenzione sfrutta preferibilmente la tecnologia SLM (Selective Laser Melting) che permette di fondere le polveri metalliche in una massa omogenea ma altro tipo di laser può essere utilizzato per conseguire la stessa finalità. The invention preferably exploits the SLM (Selective Laser Melting) technology which allows the metal powders to be melted into a homogeneous mass, but another type of laser can be used to achieve the same purpose.
La polvere metallica utilizzata può essere indifferentemente composta da titanio puro o sue leghe sotto forma di polvere fine, in quanto con tale procedimento in entrambi i casi è possibile garantire all’impianto buone proprietà meccaniche e strutturali. The metal powder used can be indifferently composed of pure titanium or its alloys in the form of fine powder, as with this procedure in both cases it is possible to guarantee the plant good mechanical and structural properties.
A titolo esemplificativo e non limitativo la tavola di disegno allegata mostra un esempio di vite realizzata col procedimento secondo l’invenzione in cui: By way of non-limiting example, the attached drawing table shows an example of a screw made with the procedure according to the invention in which:
la Fig.1 rappresenta in sezione una vite intraossea per applicazioni dentali al termine del processo di formazione tramite fusione laser; Fig.1 is a sectional view of an intraosseous screw for dental applications at the end of the formation process by laser melting;
la Fig.2 rappresenta la vite di Fig. 1 al termine del trattamento in forno a microonde. Fig.2 shows the screw of Fig. 1 at the end of the treatment in the microwave oven.
Con riferimento alla figura 1, la vite intraossea per applicazioni dentali 1 è formata da un corpo allungato, la cui estremità superiore è stata lavorata meccanicamente al fine di creare un elemento atto alla connessione con le strutture protesiche richieste di caso in caso. With reference to Figure 1, the intraosseous screw for dental applications 1 is formed by an elongated body, the upper end of which has been mechanically machined in order to create an element suitable for connection with the prosthetic structures required from case to case.
La vite 1, realizzata col procedimento secondo l’invenzione, presenta quindi un corpo 4 compatto ottenuto depositando in successione diversi strati di polvere di titanio e colpendo ogni strato con il raggio intermittente/pulsante di un dispositivo laser, preferibilmente di tipo SLM. The screw 1, made with the process according to the invention, therefore has a compact body 4 obtained by depositing in succession several layers of titanium powder and hitting each layer with the intermittent / pulsating beam of a laser device, preferably of the SLM type.
La potenza del laser impiegata è quella nominale necessaria a fondere completamente la polvere per ottenere un corpo 4 ad alta resistenza meccanica, fino ad una distanza approssimativa di 150 micron dalla superficie esterna della vite. The laser power used is the nominal power necessary to completely melt the powder to obtain a body 4 with high mechanical resistance, up to an approximate distance of 150 microns from the external surface of the screw.
Lo strato superficiale 3 della vite, realizzato depositando strati successivi di polvere di titanio ma riducendo la potenza del laser dal 60% e al 5% del valore nominale dello strumento, presenta quindi inclusioni di polvere di titanio, o di altro materiale utilizzato per gli scopi indicati, per uno spessore di circa 150 micron. The surface layer 3 of the screw, made by depositing successive layers of titanium powder but reducing the laser power from 60% to 5% of the nominal value of the instrument, therefore has inclusions of titanium powder, or other material used for the purposes indicated, for a thickness of about 150 microns.
Il procedimento descritto prevede di ridurre la potenza del laser, ma è evidente che le inclusioni si possono ottenere anche variando uno o più parametri del laser (velocità, fuoco, potenza) rispetto ai valori necessari per la completa fusione della polvere in base al tipo di macchinario utilizzato ed ai relativi parametri per i quali è possibile programmarne i valori. The procedure described involves reducing the laser power, but it is evident that the inclusions can also be obtained by varying one or more parameters of the laser (speed, focus, power) with respect to the values necessary for the complete melting of the powder based on the type of machinery used and related parameters for which it is possible to program the values.
Preferibilmente, come indicato nell’esempio di realizzazione, si utilizza la sola potenza che permette un controllo più accurato ed il più facile raggiungimento del risultato desiderato. Preferably, as indicated in the example of realization, only the power is used which allows a more accurate control and the easiest achievement of the desired result.
La vite 1 schematizzata in figura 1, che evidenzia la presenza di inclusioni di polvere di titanio nello strato superficiale 3, è quindi pronta per essere posizionata nel forno a microonde per la fase finale del procedimento. The screw 1 schematized in Figure 1, which highlights the presence of inclusions of titanium powder in the surface layer 3, is therefore ready to be positioned in the microwave oven for the final stage of the procedure.
Utilizziamo ad esempio un forno a microonde industriale da 6kW e sottoponendo la vite a 30 secondi di esposizione alla massima potenza, si innesca l’esplosione della polvere non fusa che permette di modificare lo strato superficiale 3, come mostrato in figura 2, dotandolo di cavità interconnesse di dimensioni variabili, ad esempio, tra 5 e 300 micron. For example, let's use a 6kW industrial microwave oven and by subjecting the screw to 30 seconds of exposure at maximum power, the explosion of the unfused powder is triggered which allows to modify the surface layer 3, as shown in figure 2, providing it with cavity interconnected of varying sizes, for example, between 5 and 300 microns.
La vite intraossea ottenuta col procedimento descritto è caratterizzata dal fatto che può essere utilizzata direttamente od opportunamente modificata al fine di connettere o supportare strutture protesiche interne od esterne al corpo umano od animale. The intraosseous screw obtained with the described procedure is characterized by the fact that it can be used directly or suitably modified in order to connect or support prosthetic structures inside or outside the human or animal body.
Infatti, gli oggetti realizzati con tale procedimento, non presentando microporosità strutturali, hanno l’ulteriore vantaggio di poter essere lavorati meccanicamente. In fact, the objects made with this process, not having structural micropores, have the additional advantage of being able to be worked mechanically.
L'invenzione è stata illustrata con riferimento ad una applicazione per impianti dentali ma è evidente come essa possa essere utilizzata per la produzione di qualsiasi tipo di viti intraossee o per osteosintesi, ad esempio viti da corticale, viti da spongiosa, viti cannulate, viti ad interferenza, viti e barrette riassorbibili. The invention has been illustrated with reference to an application for dental implants but it is evident that it can be used for the production of any type of intraosseous screws or for osteosynthesis, for example cortex screws, cancellous bone screws, cannulated screws, interference, screws and absorbable bars.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102018000009553A IT201800009553A1 (en) | 2018-10-17 | 2018-10-17 | METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED BY THIS METHOD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102018000009553A IT201800009553A1 (en) | 2018-10-17 | 2018-10-17 | METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED BY THIS METHOD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT201800009553A1 true IT201800009553A1 (en) | 2020-04-17 |
Family
ID=65199481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT102018000009553A IT201800009553A1 (en) | 2018-10-17 | 2018-10-17 | METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED BY THIS METHOD |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT201800009553A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010005797A1 (en) | 1994-08-08 | 2001-06-28 | Barlow Joel W | Artificial bone implants |
| US20040191106A1 (en) | 2002-11-08 | 2004-09-30 | Howmedica Osteonics Corp. | Laser-produced porous surface |
| EP1764061A1 (en) * | 2005-09-16 | 2007-03-21 | Leader Italia S.r.l. | Method for making intraosseous dental implantation structures with predefined surface geometry |
| US20150320525A1 (en) * | 2012-08-13 | 2015-11-12 | University Of Louisville Research Foundation, Inc. | Methods for fabricating dental prostheses |
| CN107874853A (en) * | 2017-10-23 | 2018-04-06 | 广东省新材料研究所 | A kind of 3D printing root of the tooth implant with multi-segment structure |
| US20180193916A1 (en) * | 2017-01-06 | 2018-07-12 | General Electric Company | Additive manufacturing method and materials |
-
2018
- 2018-10-17 IT IT102018000009553A patent/IT201800009553A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010005797A1 (en) | 1994-08-08 | 2001-06-28 | Barlow Joel W | Artificial bone implants |
| US20040191106A1 (en) | 2002-11-08 | 2004-09-30 | Howmedica Osteonics Corp. | Laser-produced porous surface |
| EP1764061A1 (en) * | 2005-09-16 | 2007-03-21 | Leader Italia S.r.l. | Method for making intraosseous dental implantation structures with predefined surface geometry |
| US20150320525A1 (en) * | 2012-08-13 | 2015-11-12 | University Of Louisville Research Foundation, Inc. | Methods for fabricating dental prostheses |
| US20180193916A1 (en) * | 2017-01-06 | 2018-07-12 | General Electric Company | Additive manufacturing method and materials |
| CN107874853A (en) * | 2017-10-23 | 2018-04-06 | 广东省新材料研究所 | A kind of 3D printing root of the tooth implant with multi-segment structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Dikova et al. | Modern trends in the development of the technologies for production of dental constructions | |
| CN105522151B (en) | A kind of method of 3D printing medical titanium alloy material | |
| CN106312060B (en) | A kind of preparation method of the low modulus medical titanium alloy 3-dimensional metal part of high-performance | |
| EP3377123B1 (en) | Processes for additively manufacturing orthopedic implants | |
| CN107805066B (en) | Method for processing biological ceramic parts based on selective laser sintering | |
| US20150030493A1 (en) | Porous structures and methods of making same | |
| Miranda et al. | Surface design using laser technology for Ti6Al4V-hydroxyapatite implants | |
| Dzhendov et al. | Application of selective laser melting in manufacturing of fixed dental prostheses | |
| CN105603255B (en) | A kind of 3D printing prepares medical titanium alloy material | |
| CN104498940B (en) | Method of manufacturing titanium-alloy artificial joints by virtue of laser material increase | |
| CN105648270B (en) | Rare earth titanium alloy material prepared by a kind of 3D printing | |
| CN107049538B (en) | A kind of artificial tooth SLM 3D printing method | |
| KR101603903B1 (en) | Method for modifying surface property of metal implant manufactured by 3D printing | |
| SE512809C2 (en) | Method, device and use in dental or other human body related product | |
| Santos et al. | Mechanical properties of pure titanium models processed by selective laser melting | |
| Ramirez-Cedillo et al. | Process planning guidelines in selective laser melting for the manufacturing of stainless steel parts | |
| Gali et al. | 3D Printing: the future technology in prosthodontics | |
| KR101109578B1 (en) | A surface treating method of use RF-sputtering process for Dental Implant Fixture | |
| Ryniewicz et al. | Microstructural and micromechanical tests of titanium biomaterials intended for prosthetic reconstructions | |
| KR100858105B1 (en) | Porous Implant Fixture with multiplicity shapes | |
| Myszka et al. | Comparison of dental prostheses cast and sintered by SLM from Co-Cr-Mo-W alloy | |
| Al-Ahmari et al. | Patient specific mandibular implant for maxillofacial surgery using additive manufacturing | |
| IT201800009553A1 (en) | METHOD FOR MAKING SCREWS FOR INTRA-BONE FIXATIONS AND SCREWS OBTAINED BY THIS METHOD | |
| US11123164B2 (en) | Dental prosthetic | |
| Alifui-Segbaya et al. | Clinical relevance of laser-sintered Co-Cr alloys for prosthodontic treatments: a review |