• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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  • 优先权
    • 专利摘要:
    A method of manufacturing a dental implant prosthesis, characterized in that it comprises a step of manufacturing the outer wall (E5) of the dental prosthesis and a step of manufacturing at least one connector (E6) for a fixation on at least one implant.
    公开号:FR3033491A1
    申请号:FR1551959
    申请日:2015-03-09
    公开日:2016-09-16
    发明作者:Charles Louis Marie Deville；Cedric Lancieux；Cedric Gilbert Allene
    申请人:Lyra Holding；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION The invention relates to a method for manufacturing a dental prosthesis on an implant. It also relates to a device implementing this method. STATE OF THE ART When it is necessary to reconstruct a dentition, a method of the state of the art relies on the use of at least one dental implant directly fixed in the bone framework, on which a dental prosthesis is fixed. , via an implant abutment. The solutions of the state of the art often require manual steps in the manufacture of a dental prosthesis.
    [0002] Figures 1 to 5 illustrate a method according to the state of the art for replacing a tooth. Figure 1 shows the jaw 1 in the area where the missing tooth, in which an implant 2 has been fixed in a traditional manner. Figure 2 shows a dental prosthesis 10, intended to replace the missing tooth, which comprises a peripheral surface 11 best imitating the shape of a real tooth and defined as a function of the shape of the free space from neighboring teeth. The dental prosthesis 10 is further pierced by a through opening 12, forming in its lower part a connector 16. Note that this connector 16 is not detailed for reasons of simplification of the representation, but it includes in practice a 3033491 2 complex form. The dental prosthesis 10 is associated with a pillar 3, which comprises a first part 4 intended to cooperate with the connector 16 of the dental prosthesis 10, and a second part 5 intended to cooperate with the external end 6 of the implant 2 This connection of the dental prosthesis 10 to the abutment 3 is locked by gluing. FIG. 3 shows the assembly of the dental prosthesis 10 on the implant 2, via the abutment 3. This assembly is then secured by a screw 15, inserted in the opening 12 of the prosthesis to be screwed onto the implant. implant 2, through the pillar 3 on which the screw head 10 abuts, as illustrated in Figure 4. When this operation is completed, the opening 12 of the dental prosthesis 10 is blocked by a suitable material 7. As a remark, the pillar 3 therefore represents an intermediate piece between the dental prosthesis and the implant. A particularity of an implant prosthesis with respect to an off-implant prosthesis 15 arises from the fact that the implant prosthesis comprises a connection of very small dimension in the lower part, to cooperate with a pillar, generally inscribed in a cylinder of diameter. the order of 3 mm. In practice, the outer surface 11 of the dental prosthesis 10 is sometimes machined by the dentist during the restoration operation, from a substantially parallelepipedic block 20, shown in FIG. 6, comprising a through opening 22 corresponding to the future through opening 12 of the dental prosthesis. This block 20 thus integrates the connector 16 of the future crown. Finally, the block 20 is attached to a gripping member 21 whose connection is adapted for attachment to a machining machine, which holds the block 20 by this gripping member 21 while its outer surface 11 is machined. The disadvantage of this state of the art solution described above stems from the fact that it is necessary to manufacture beforehand the above-mentioned blocks of complex shape because of their connections. Different blocks are formed, corresponding to different existing connection standards, more specifically to existing pillars. In practice, only two different types of connection exist, which strongly limits the choice of implant abutments and implants usable by this solution of the state of the art. The latter is therefore very limiting and is not implementable on most existing implants. In addition, each dentist must have a stock of the different existing blocks to select, on a case-by-case basis, the one he needs. On the other hand, it is difficult to achieve great precision when making the final prosthesis with such an approach, since it is necessary to achieve a perfect alignment in theory of the outer surface 11 around the opening 22. preformed, when machining the final prosthesis. In practice, there is always a slight shift, which then complicates the final operation of fixing the prosthesis in the patient's mouth. Finally, the overall manufacture of a prosthesis is complex, long and costly because it requires a first step of manufacturing a complex block, then a separate second step of machining the complex block, in addition to the logistics operations of referencing, storage and transport of complex blocks. OBJECT OF THE INVENTION The object of the present invention is to provide a solution for manufacturing a dental implant prosthesis that overcomes all or part of the disadvantages of the state of the art, particularly the disadvantages listed above.
    [0003] Thus, an object of the invention is to propose a solution for manufacturing a dental prosthesis on a more precise and less restrictive and more universal implant implant.
    [0004] To this end, the invention is based on a method of manufacturing a dental implant prosthesis, characterized in that it comprises a step of manufacturing the outer wall of the dental prosthesis and a manufacturing step of at least a connector for attachment to at least one implant.
    [0005] These steps of manufacturing the outer wall of the prosthesis and manufacturing a connector for attachment to at least one implant are advantageously performed with the same manufacturing device.
    [0006] Advantageously, the manufacture of a connector can be done automatically or almost automatically on a manufacturing device, suitable for implementation in a dental office.
    [0007] According to one embodiment, the step of manufacturing a connector with at least one implant of the dental prosthesis comprises the manufacture of a connector adapted for a direct connection to an implant, or adapted for connection with one or more intermediate piece (s), such as a pillar, for attachment to an implant. The steps of manufacturing the outer wall of the dental prosthesis and manufacturing a connector for attachment to an implant by removal of material, for example machining or laser cutting, from a solid block, especially disilicate lithium, or feldspar ceramic, nano-composite, zirconia, temporary material such as PMMA, or PEEK, a metallic material. The method of manufacturing a dental prosthesis may comprise the following 5 preliminary steps: Determination of the shape of the outer wall of the dental prosthesis to be manufactured by a computer; - Determination of the connection with an implant of the dental prosthesis to be manufactured by a calculator.
    [0008] The step of determining the connectivity with an implant may comprise the following sub-steps: intra-oral scanning at the area concerned and / or input by a human machine interface of data determining the type of implant, and transmitting the scan data or data to a calculator; - Selection by a computer of the geometry of the connector adapted to said at least one implant among a library stored in an electronic memory.
    [0009] The method of manufacturing a dental prosthesis may comprise the complementary steps of: reading in an electronic memory of data of manufacturing strategies, such as machining strategies; 25 - transmission of manufacturing orders to a manufacturing device. The method of manufacturing a dental prosthesis may comprise a step of manufacturing a plurality of material-removing connectors for making a dental prosthesis for attachment to multiple implants from a single block.
    [0010] The steps for manufacturing the dental prosthesis may be machining steps that use the same machining tool or several machining tools, or may be laser cutting or material addition steps, for one or more machining steps. performing the manufacturing steps in the same operation on the same manufacturing device. The invention also relates to a device for manufacturing a dental implant prosthesis, comprising a tool holder for a tool and a computer, characterized in that the computer transmits control commands to the tool holder of the tool to manufacture the shape of the outer wall of a dental prosthesis and to manufacture at least one connector for attachment to at least one implant, thereby implementing a method of manufacturing a dental prosthesis as described above. The computer may implement a computer program for determining the shape of the outer wall of the dental prosthesis to be manufactured and for determining the connector for fastening to at least one implant or is connected by a communication device to a connector. external computer implementing at least one of these determination steps and transmitting to it the digital data resulting from this determination.
    [0011] The device for manufacturing a dental prosthesis may comprise a machining tool which is an at least partly conical machining cutter, of length greater than or equal to 17 mm, and comprising an end inscribed in a cylinder of smaller diameter. or equal to 1.05 mm.
    [0012] The device for manufacturing a dental prosthesis may comprise an electronic memory linked to the computer on which is stored a library of connectors with implant for a dental implant prosthesis. The device for manufacturing a dental prosthesis may comprise a man-machine interface allowing an operator to enter an implant model used. The invention also relates to a dental restoration system, characterized in that it comprises an intraoral scanning device and a device for manufacturing a dental prosthesis as described above, and a device for communication between the device Intra-oral scanning and dental manufacturing device. The invention also relates to a computer readable medium that is characterized in that it comprises a registered computer program comprising computer program code means for implementing a method of manufacturing a dental prosthesis on a computer. implant, comprising the following steps: - automatic determination or by input through a human machine interface of one or more reference (s) of (or) implant (s) concerned (s) by a dental restoration , transmission of this or these data (s) to a calculator; selection by said calculator of the geometry of at least one dental prosthesis connector adapted to at least one implant of the dental restoration zone concerned among a library stored in an electronic memory; - Transmission of manufacturing commands of at least one connector of the dental prosthesis to a manufacturing device, to manufacture the at least one connector selected by the preceding steps.
    [0013] The invention also relates to a method of manufacturing a dental implant prosthesis, characterized in that it implements the following steps: 5 - automatic determination or by input via a human machine interface one or more reference (s) of (or) implant (s) concerned by a dental restoration, transmission of this or these data (s) to a calculator; 10 - selection by said calculator of the geometry of at least one connector of a dental prosthesis adapted to at least one implant of the dental restoration area concerned among a library stored in an electronic memory; optionally, reading in an electronic memory data of manufacturing strategies, such as machining strategies; - Transmission of manufacturing commands of at least one connection of the dental prosthesis to a manufacturing device, to manufacture the at least one connector 20 selected by the preceding steps. The invention also relates to a device for manufacturing a dental implant prosthesis, comprising a tool holder for a tool and a computer, characterized in that the computer transmits control commands to the tool holder to manufacture at least a connector, particularly by machining, for attachment to at least one implant, thereby implementing a method of manufacturing a dental prosthesis according to the preceding claim.
    [0014] BRIEF DESCRIPTION OF THE DRAWINGS These objects, features and advantages of the present invention will be set forth in detail in the following description of a particular embodiment given as a non-limiting example in connection with the attached figures among which: FIGS. 1 to 5 represent steps of a dental restoration method according to a state of the art. Figure 6 shows a preformed block serving as a basis for a dentist for machining a dental prosthesis according to a state of the art.
    [0015] Figure 7 schematically shows a device for manufacturing a dental prosthesis according to one embodiment of the invention. Figure 8 shows a milling cutter used by the manufacturing device according to the embodiment of the invention. Figures 9a and 9b show solid blocks serving as a basis for a dentist for machining dental prostheses according to one embodiment of the invention.
    [0016] Figures 10a and 10b show the connection of a dental prosthesis after machining a block by the manufacturing device according to one embodiment of the invention.
    [0017] FIG. 11 represents a bridge-type dental prosthesis comprising several connectors adapted for connection to a plurality of implants according to one embodiment of the invention.
    [0018] Figures 12 to 21 schematically show the steps of a dental restoration method incorporating a method of manufacturing a dental prosthesis according to an embodiment of the invention. Figures 22 to 27 schematically illustrate an alternative of the steps of a dental restoration method incorporating a method of manufacturing a dental prosthesis of the embodiment of the invention. Figure 28 schematically illustrates the steps of the method of manufacturing a dental prosthesis according to an embodiment of the invention. Figures 29a and 29b show a machining strategy implemented according to one embodiment of the invention.
    [0019] DESCRIPTION OF AN EMBODIMENT OF THE INVENTION The embodiment of the invention is based on a manufacturing device 30, represented by FIG. 7, which comprises a tool holder 33 designed to receive a machining tool. , advantageously a milling cutter 25, adapted for machining a block which would be positioned in a housing 32 adapted for this purpose. This manufacturing device also comprises a computer 35, for example an on-board computer or any electronic processor, connected to an electronic memory 36 and a communication device 37 to the outside, and possibly a screen 38 and / or a keyboard 39. According to the embodiment, the computer 3033491 11 implements a computer program for performing all or part of the steps of the method of manufacturing a dental prosthesis which will be described below. This manufacturing device advantageously comprises a control module and a drive technology 5 brushless technology, often called by its English name of "brushless", allowing a precision of movement of the machining tool 31 and a stability of the machine guaranteeing a good machining of small geometric surfaces.
    [0020] According to one embodiment, a machining tool 31 used by the manufacturing device is shown in FIG. 8. It is in the form of a milling cutter, of the diamond cutter type, which comprises a zone of Work of length L greater than or equal to 17 mm, advantageously around 18 mm, of conical shape with an angle of less than or equal to 5 °, and 15 end end inscribed in a disc having a diameter of about 1 mm. Its conical shape allows it to have a good robustness despite its great working length. The cone of the cutter is dimensioned with a low value, which allows him to machine many connectors. Its fine tip, with a diameter of less than or equal to 1.05 mm, also makes it possible to retranscribe the small details of the connectors. FIG. 9a or 9b illustrates a solid block 40 which serves as a basis for the manufacture of a prosthesis. This block is similar to block 20 of the state of the art shown in FIG. 6, with the essential difference that it is full. It does not present opening or connections. It comes in a rectangular parallelepiped shape. Alternatively, any other basic form could be envisaged, greater in volume than the prosthesis to be machined, by removal of material on said block 40. This shape can be cylindrical, spherical, disc-shaped ... We hear block solid a block that does not present the connector on preformed implant as in the state of the art, or that does not include all the necessary connectors. It is preferably full, ie not including any opening. Such a block comprises a gripping member 41 which allows its holding by the manufacturing device during its machining. At the end of machining, the gripping member 41 is cut and the surface of the prosthesis at the cutting is resumed. The block 40 can be in different materials, among others lithium disilicate, feldspar ceramic, a nano-composite, zirconia, a metal material, for example based on titanium or cobalt chromium, a temporary material such as PMMA, or PEEK. When a patient is treated by a dentist for a dental restoration based on the positioning of at least one dental implant in his jaw, to obtain the result shown in Figure 1 in the traditional way, the dentist then proceeds with the procedure. of manufacturing the associated dental prosthesis, which comprises, according to the embodiment of the invention, the simultaneous or almost simultaneous production by the same manufacturing device of the connector of the dental prosthesis 20 intended to cooperate with the implant and of the peripheral surface of the dental prosthesis, as will be detailed later. This approach has the great advantage of allowing the dentist to manufacture any prosthesis in any circumstances directly in his dental office, to treat better and faster any patient, without dependence on a stock of complex and expensive blocks as in the solution of the state of the art described above and without being limited to a few models of implants and / or compatible abutments. As a remark, we mean by implant connection a surface of particular geometry that allows a mechanical assembly with an implant, either directly or indirectly through one or more intermediate prosthetic components, such as a pillar. The manufacturing device thus participates in the implementation of a method of manufacturing a dental prosthesis, represented by FIG. 28, which notably comprises the following steps: Determination of the shape of the outer wall El of the prosthesis ; - Determination of the connector E2 implant on the prosthesis; - From a single standard solid block 40, machining the shape of the outer wall E5 of the prosthesis and machining of the E6 connector with implant of the prosthesis.
    [0021] Advantageously, the two determination steps E1, E2 are carried out by the manufacturing device 30, by a computer program executed by its computer 35, from data of the patient's mouth, in particular determining the type of implant used. for the dental restoration concerned, automatically transmitted to the manufacturing device 30 via its communication device 37 and / or manually entered by the dentist via a human machine interface presented on the screen 38 of the device of manufacture or of an external device connected, possibly using a keyboard 39.
    [0022] According to an advantageous solution, the same manufacturing device 30 implements the two machining steps E5, E6 mentioned above. These two machining steps are preferably implemented in the same machining operation, simultaneously or successively. A great advantage of the solution stems from the accuracy of the final prosthesis 30334 obtained. Indeed, the fact of machining all of the dental prosthesis by the same manufacturing device in a single operation, in which the block 40 remains held by its gripping member 41 without discontinuity throughout the operation, allows for to reach a perfect precision of the alignment between, on the one hand, the connector on implant of the prosthesis and, on the other hand, the peripheral surface of the tooth, without any loss of reference. As a reminder, in the solution of the state of the art, it is very difficult to obtain a good alignment of the peripheral surface to be machined with the preformed connectors, which induces offsets.
    [0023] The step of determining the connector E2 on the implant by the manufacturing method may be totally or partially automated. It may comprise the following substeps: E21: digitization of the jaw at the zone to be restored, in particular of the implant (s) concerned, transmission of the digitization data to a computer, preferably the computer 35 of the manufacturing device 30 by a communication link between the digitizing apparatus used, for example of the intraoral scanning type, and the communication device 37 of the manufacturing device 30. According to the embodiment, this digitization implements an automatic recognition step of the implant (s) concerned by the restoration. Alternatively, an operator enters the reference of (or) the implant concerned via a human machine interface, so that this information is transmitted to a computer 25 which implements this manufacturing process; E22: selection by the computer 35 of the geometry of the connector adapted to at least one implant, preferably each implant, from a library stored in the electronic memory 36, each implant concerned being known by the previous step.
    [0024] According to an alternative embodiment, these two steps are performed by a sufficiently precise digitization step to automatically deduce the form of the connector, without resorting to a library.
    [0025] As a remark, the library of connectors stored in the electronic memory 36 makes it possible to predefine forms of connectors adapted to the existing implants and abutments, and moreover compatible with the manufacturing method chosen, in this embodiment by the manufacturing device. previously described. By way of non-limiting example, the manufacturing device 30 makes it possible to manufacture a connector whose exemplary embodiment is represented by FIGS. 10a and 10b. Figure 10a shows a sectional view of a connector 66 for a dental implant prosthesis, by a median plane including the axis of the prosthesis, for alignment with the axis of the implant. FIG. 10b shows a sectional view of the connector 66 for a dental implant prosthesis by a plane perpendicular to the axis of the dental prosthesis 60, at a polarizer 69. In the two figures, the line shape solid represents a theoretical form, possibly defined by the manufacturer of the implant or the pillar, while the dotted shape corresponds to the adapted form and stored in the library. This adapted form remains compatible with the theoretical form but also becomes compatible with the manufacturing method chosen, which comprises in this embodiment a machining with a tool such as that described with reference to FIG. 8. Thus, the right angles are for example slightly rounded to allow their manufacture with a small size milling cutter, including the corners of the key 69. This library defines 3033491 16 more games sufficient for the possible insertion of an adhesive, for example of the order of 60 pm, or 80 pm. In addition, the manufacturing method then implements a step E23 for determining a machining strategy to manufacture the connections determined at the end of the previous step E22. For this, machining strategies are predefined in an electronic memory, which is consulted by the computer in charge of this process step. This step thus makes it possible to define at the output the control commands 10 of the tool holder 33 of the manufacturing device 30, transmitted to the manufacturing device in a command transmission step E24, to automatically engage the manufacture of the connection of the dental prosthesis.
    [0026] FIGS. 29a and 29b illustrate by way of example the manufacturing strategy type data stored in the electronic memory to form the extreme flat surface 67 of the connector 66 of a dental prosthesis 60. These data define a machining strategy to obtain the flat surface 67 at the end of the connector 66 of the dental prosthesis, in particular using a tool similar to the cutter described above with reference to FIG. 8. This strategy results in the two steps following machining to form this flat surface 67: - in a first stage, temporary production of this surface 25 by intentionally creating a surplus 68 of material; - In a second step, machining of this surplus material 68 by a spiral contouring along the path 70 shown schematically, at a reduced speed, to obtain the plane surface 67.
    [0027] Such an approach thus makes it possible to form the flat surface 67 by guaranteeing a bearing surface without microcracking or shine, and of good flatness.
    [0028] As mentioned above, the step of machining the E6 connector with implant is implemented by machining commands transmitted by the computer 35 to the machining tool 31 according to the determined connections, and of the predetermined machining strategy. Note that this approach makes it possible to automate the entire method of manufacturing a dental prosthesis, and allows for example a practitioner to simply inform the type of implant (s) used (s) input process, to obtain at output the automatically manufactured dental prosthesis, in his own cabinet, without human intervention nor need the expertise of a machining expert, with great precision and in a reduced time. The method thus enables a patient to leave with his complete and definitive dental restoration in a single session at the practitioner's. The steps for forming the outer surface of the prosthesis, best imitating the shape of the tooth to be replaced and optimally occupying the available space, are similar to those existing in the state of the art and are not described. right here. According to another advantageous aspect of the embodiment of the invention, it is possible to easily and accurately manufacture a dental prosthesis intended to replace at least two adjacent teeth, and requiring a fixation on at least two implants, of the bridge type. For this, the manufacturing device 30 and the method of manufacture described above are used to manufacture, from a single block 30 of larger size, in particular of greater length, shown in FIG. 9b, a prosthesis dental system comprising several connectors for its fixation on several implants and a single and continuous peripheral surface reproducing several teeth. FIG. 11 illustrates, by way of example, such a bridge type prosthesis 60 obtained by a material removal manufacturing process from a block such as that shown in FIG. 9b. The various connectors 66 advantageously have parallel axes between them.
    [0029] Note, in such a dental prosthesis implant with multiple connectors, spacing and types of different connectors are unique each time since they depend on the frame of the area to restore. Thus, such a prosthesis with several connectors is necessarily personalized. For this, such a manufacture was impossible with the state of the art described above, which was to be limited to a single connector preformed block. As a remark, all or part of the calculation steps performed on a computer are advantageously processed by the computer 35 of the manufacturing device 30. However, as a variant, all or part of these calculations can be deported to an external computer and then transmitted to the computer. manufacturing device 30 by a remote communication, preferably automatic, without intervention of an operator. Indeed, this process is preferably automated or partially automated. Similarly, the connector library can be deported to an external electronic memory. This solution allows integration into a dental restoration process, the manufacturing device belonging to a larger dental restoration system.
    [0030] Figures 12 to 21 thus illustrate the steps of a dental restoration method according to one embodiment of the invention.
    [0031] FIG. 12 corresponds to FIG. 1, in which an implant 2 having a connector 6 on its external end has been fixed in a jaw 1. FIG. 13 represents an intermediate step of fixing a marker element 52 implant 2, commonly referred to by its English name of "scan-body", before a scanning step shown in Figure 14, using a scanning device 55 adapted for scanning in the mouth of a patient, such as an intraoral scanner. The method then implements a step 15 for transmitting the digitization results to a computer, which virtually reproduces the geometry of the patient's mouth, as represented in FIG. 15. From these data, the computer implements the method. of a prosthesis, as previously described, and then the prosthesis is manufactured by the manufacturing device 30, as shown in FIGS. 16 and 17. As mentioned above, the scanning step makes it possible to fulfill a first function of defining the geometry of the outer wall of the dental wall and possibly a second function of automatic recognition of at least one implant concerned by the restoration. FIG. 18 diagrammatically shows the resulting prosthesis 60, which comprises a peripheral surface 61 mimicking at best the shape of a real tooth, pierced by a substantially cylindrical through opening 62, forming in its lower part a connector 66. This prosthesis 60 is then directly associated with the implant 2, their respective connectors 66, 6 being directly connected to each other, as represented by FIG. 19. These parts have perfectly corresponding geometries since the prosthesis 60 was manufactured in function of the implant used. Note that this connection provides sufficient clearance for the possible insertion of a bond between the prosthesis and the implant, at their connection. In the representation of the figures, the connector 66 of the prosthesis is of the male type, and is inserted into the female connector 6 of the implant. As a variant, this connection 66 could come to fit an outer surface of the implant 2. According to another variant, the implant could have a male connector 15 that would fit into a female connector of the dental prosthesis 60. Finally, the combination of the prosthesis 60 and the implant 2 is locked by means of a screw 15 inserted into the through opening 62 of the prosthesis, as shown in FIG. 21, in order to implement screwing in the implant 2, and the positioning of its head bearing on an abutment formed in the connector 66 of the prosthesis 60. The operation is finalized by refilling the prosthesis 60, as shown in FIG. 21.
    [0032] As a remark, this restoration method has the particularity of allowing the direct connection of the prosthesis to an implant, without the need for an intermediate component, unlike the solutions of the state of the art. This is particularly possible and efficient thanks to the increase in the accuracy of the geometry of the prosthesis manufactured by the embodiment of the invention. This direct connection method also solves the technical problem of simplifying existing restoration methods. Thus, alternatively, this method could be implemented with a prosthesis manufactured differently from the manufacturing method described above, in particular in two separate machining steps, or even performed by two separate machines.
    [0033] Of course, the restoration process is not limited to that described above. Thus, alternatively, the prosthesis made according to the embodiment of the invention can naturally be used for the implementation of a dental restoration implementing the known principle of using an intermediate pillar between the implant and the implant. prosthesis. Such a restoration method would then comprise initial steps similar to the steps described with reference to FIGS. 12 to 17, then the association of the obtained prosthesis with a pillar 3 to finalize the restoration process in a manner similar to the state of the restoration. 20 to 27 illustrate another alternative embodiment of the restoration method according to the embodiment of the invention. In this variant, the restoration method first comprises initial steps similar to the steps described with reference to FIGS. 12 to 17. In this variant, the prosthesis 60, illustrated in perspective view from above in FIG. differs from previous embodiments in that it is in two distinct parts, a central portion called stub or clevis 70, and an outer portion 71. The yoke 70 30 comprises the connector 66 manufactured according to the steps described 3033491 22 previously, while the outer part comprises the peripheral surface mimicking the tooth. According to one embodiment, the two parts 70, 71 of the prosthesis 60 are manufactured with the manufacturing device 30 from two separate blocks.
    [0034] Then, the connection with an implant 2 is obtained by means of a pillar 3. For this, the yoke 70 is then attached to a pillar 3, as shown in FIG. 23, and then the pillar 3 is attached to the pillar 3. implant 2, as shown in Figure 24. This assembly is secured by a screw 15, 10 and the through opening 74 of the yoke 70 is closed, to achieve the result shown in Figure 26. Finally, the outer portion 71 of the prosthesis 60 is fixed on the yoke 70, for example by gluing the surface of its connector on the outer surface of the yoke 70, to achieve the result shown in FIG. 27.
    [0035] The foregoing restoration methods have all been described with the use of a fixation locking screw on an implant. As a variant, any other fastening device, mechanical or chemical, by bonding, without screws, could be implemented.
    [0036] In addition, as previously explained, the restoration method described above can be similarly implemented for the manufacture and fixation of a bridge, that is to say a dental prosthesis comprising several connectors for a simultaneous fixation on several implants in order to replace several missing neighboring teeth. The preceding embodiments have been illustrated by way of nonlimiting examples and it is naturally possible to envisage other embodiments, for example by combining the described embodiments. Thus, in all the embodiments described, it is possible to manufacture a dental prosthesis in several parts, for example in two parts forming a stub or clevis and a peripheral part, as in the last embodiment. In such a case, the two machining steps can be performed on the same machine, but potentially in two distinct, successive or simultaneous operations. These two steps use two separate solid blocks, instead of the single block used preferably in the other embodiments described. The manufacturing device previously described by way of example advantageously allows the same manufacturing device to machine with the same machining tool, in particular the mill described by way of example with reference to FIG. a dental implant prosthesis, with one or more connectors (s). Alternatively, the manufacturing device could operate with several distinct machining tools, either successively arranged on the same tool holder, or used simultaneously as fixed on separate tool holders, the device being in the latter case equipped with several toolholders. Thus, two separate machining tools could be used to respectively manufacture the connector and the outer wall of the prosthesis. Thus, each tool 20 could be provided with a distinct shape, different from the geometry described in FIG. 8, and specifically adapted to the machining step concerned. In such a case, the machining of the connector could be made with a non-conical tool, for example cylindrical or ball-shaped. Such an embodiment retains the advantage of being able to achieve the overall prosthesis within a dental office, preferably with a single machine, but alternatively with the aid of two separate machines. It also retains the interest of being able to carry out this manufacturing in an automated manner and therefore very fast.
    [0037] On the other hand, according to another embodiment, the method of manufacturing the prosthesis, as well as the manufacturing device, could operate from one or more other tool (s) than that mentioned in FIG. as an example. Thus, the manufacturing device could be of the laser machining type. As a variant, it could be of the 3D printing type, based on laser or other technology, making it possible to manufacture the prosthesis by addition of material and no longer by withdrawal. Such embodiments would retain the advantage of being able to produce an overall dental prosthesis with a single device, preferably in a single operation, and / or from a single starting block. They could also allow an automatic or quasi-automatic implementation, like the other described implementations. They could be used in a dental office, to treat a dental restoration of a patient in a single operation. Thus, the embodiments described are advantageous in that they comprise a step of manufacturing the outer wall E5 of the dental prosthesis and a step of manufacturing at least one connector E6 intended for attachment to at least one implant this manufacture can be performed by several different techniques. The terms "machining" previously used in the embodiment described in detail can therefore be generalized by the term "manufacture" to refer to other manufacturing techniques, and thus to form other embodiments of the invention. . On the other hand, as is apparent from the foregoing description, the foregoing embodiments all solve a technical problem of simplification, acceleration, and improvement of the fabrication of a dental implant prosthesis by the fact that they propose a solution. allowing the manufacture of at least one connector adapted for connection to at least one implant, which can be done automatically or almost automatically, and therefore for example in a dental office by a practitioner having no particular competence in machining or other machine. Thus, the invention also relates to a method of manufacturing a dental prosthesis, which implements the following steps: E21: automatic determination or by input via a human machine interface of one or more reference (s) of (or) implant (s) concerned (s) by a dental restoration, transmission of this (these) data (s) to a computer that implements this manufacturing process; E22: selection by said computer of the geometry of the connector adapted to each implant among a library stored in the electronic memory; E23: optionally, reading in an electronic memory of data of manufacturing strategies, such as machining strategies; E24: transmission of manufacturing commands to a manufacturing device, which implements the step of manufacturing the connection (s) E6 of the dental prosthesis. Then, the method can implement the step of manufacturing the outer wall E5 of the dental prosthesis, with the same manufacturing device or not, the same tool or not, in the same operation or not.
    [0038] All the preceding embodiments have the same interest to allow the manufacture of a connector on implant of a dental prosthesis on implant in dental office, which brings the flexibility and advantages explained above. As a remark, the invention is concerned with the field of dental prosthesis implant, direct or indirect, which has the particularity and technical difficulty of very small dimensions. By way of nonlimiting example, implant restoration requires in particular the manufacture of at least one connector, at least one end portion of which is inscribed in a cylinder with a diameter of less than or equal to 7 mm, and even less than or equal to 4 mm 3033491 26 or even 3 mm for internal connectors for example conical or cylindrical. Such a connector comprises an end portion of smaller dimension than the values mentioned above, closer to a cylinder diameter of 2 mm. Such a connector 5 further comprises complex shapes, such as a polarizer, which can be formed by a protuberance or a hollow portion, which performs the function of good orientation of the prosthesis and the rotational maintenance function. Thus, the manufacture of an implant prosthesis includes very high requirements, and can not be compared to the manufacture of an off-implant prosthesis. On the other hand, the method and the manufacturing device according to the invention can naturally also be used to manufacture prostheses out of implant. The invention also relates to a device for manufacturing a dental implant prosthesis, which implements one of the manufacturing methods described above. Finally, as explained above, the invention is based on a computer program for generating the commands for manufacturing a dental prosthesis, this program being able to be executed on any computer, integrated into the manufacturing device or external and connected to distance to this device. Thus, the invention also relies on a computer medium readable by a management unit, or by said computer, characterized in that it comprises a computer program recorded 25 comprising computer program code means for implementing the method of manufacturing a dental implant prosthesis as previously explained. Such a computer program may comprise the steps E21 to E24 explained above. 30
    权利要求:
    Claims (18)
    [0001]
    REVENDICATIONS1. A method of manufacturing a dental implant prosthesis, characterized in that it comprises a step of manufacturing the outer wall (E5) of the dental prosthesis and a step of manufacturing at least one connector (E6) for a fixation on at least one implant.
    [0002]
    2. A method of manufacturing a dental prosthesis according to the preceding claim, characterized in that it comprises the steps of manufacturing the outer wall (E5) of the prosthesis and manufacturing a connector (E6) for fixing on at least one implant with the same manufacturing device (30).
    [0003]
    3. A method of manufacturing a dental prosthesis according to one of the preceding claims, characterized in that the step of manufacturing a connector (E6) with at least one implant of the dental prosthesis comprises the manufacture of a connector adapted for direct connection to an implant (2), or for connection with one or more intermediate parts (s), such as a pillar (3), for attachment to an implant (2).
    [0004]
    4. A method of manufacturing a dental prosthesis according to one of the preceding claims, characterized in that it comprises the steps of manufacturing the outer wall (E5) of the dental prosthesis and manufacturing a connector (E6). for attachment to an implant by removal of material, for example machining or laser cutting, from a solid block (40), in particular lithium disilicate, or feldspar ceramic, nano-composite, zirconia, temporary material such as PMMA, or PEEK, a metallic material. 3033491 28
    [0005]
    5. A method of manufacturing a dental prosthesis according to one of the preceding claims, characterized in that it comprises the following preliminary steps: Determination of the shape of the outer wall (El) of the dental prosthesis to be manufactured by a calculator; Determination of the connection (E2) with an implant of the dental prosthesis to be manufactured, by a calculator. 10
    [0006]
    6. A method of manufacturing a dental prosthesis according to the preceding claim, characterized in that the step of determining the connection (E2) with an implant comprises the following sub-steps: scanning (E21) intra-oral at the level of the zone 15 concerned and / or entered by a data man-machine interface determining the type of implant, and transmitting the digitization or input data to a computer; - Selection (E22) by a calculator of the geometry of the connector adapted to said at least one implant concerned among a library stored in an electronic memory.
    [0007]
    7. A method of manufacturing a dental prosthesis according to the preceding claim, characterized in that it comprises the complementary steps of: - reading (E23) in an electronic memory data manufacturing strategies, such as machining strategies ; - transmission (E24) of manufacturing orders to a manufacturing device. 3033491 29
    [0008]
    8. A method of manufacturing a dental prosthesis according to one of the preceding claims, characterized in that it comprises a step of manufacturing several connectors (E6) by removal of material to manufacture a dental prosthesis for fixation on several 5 implants from a single block (40).
    [0009]
    9. A method of manufacturing a dental prosthesis according to one of the preceding claims, characterized in that the steps of manufacturing the dental prosthesis (E5, E6) are machining steps that use the same machining tool (31) or more machining tools, or are laser cutting or material addition steps, for carrying out the manufacturing steps in a single operation on the same manufacturing device. 15
    [0010]
    Apparatus for manufacturing a dental prosthesis on an implant, comprising a tool holder (33) for a tool (31) and a calculator (35), characterized in that it comprises a computer medium comprising a recorded informafic program comprising computer program code means for implementing a method for manufacturing a dental prosthesis on an implant according to one of the preceding claims, so that the computer (35) implements the computer program and transmits control commands to the tool holder (33) of the tool (31) to manufacture the shape of the outer wall (61) of a dental prosthesis and to manufacture at least one connector (66) for fixing on at least one implant, thus implementing a method of manufacturing a dental prosthesis according to one of the preceding claims.
    [0011]
    11. Device for manufacturing a dental prosthesis according to the preceding claim, characterized in that it comprises a computer medium comprising a computer program recorded 3033491 30 comprising computer program code means for implementing a method of manufacturing a dental implant prosthesis so that the computer (35) implements a computer program for determining the shape of the outer wall (61) of the dental prosthesis to be manufactured and the determination of the connector (66) intended for attachment to at least one implant or is connected by a communication device (37) with an external computer implementing at least one of these determination steps and transmitting to it the digital data resulting from this determination. 10
    [0012]
    12. Device for manufacturing a dental prosthesis according to one of claims 10 or 11, characterized in that it comprises a machining tool (31) which is a machining cutter at least partly conical, length greater than or equal to 17 mm, and comprising an end 15 inscribed in a cylinder of diameter less than or equal to 1.05 mm.
    [0013]
    13. Device for manufacturing a dental prosthesis according to one of claims 10 or 12, characterized in that it comprises an electronic memory (36) linked to the computer (35) on which is stored a library of connectors with implant for a dental implant prosthesis.
    [0014]
    14. Device for manufacturing a dental prosthesis according to one of claims 10 or 13, characterized in that it comprises a man-machine interface allowing an operator to enter an implant model used.
    [0015]
    15. Dental restoration system, characterized in that it comprises an intra-oral scanning device (55) and a device 30 for manufacturing a dental prosthesis (30) according to one of claims 10 to 14, and a communication device between the intraoral scanning device and the dental manufacturing device. 3033491 31
    [0016]
    Computer-readable computer support, characterized in that it comprises a registered computer program comprising computer program code means for implementing a method of manufacturing a dental prosthesis on an implant, comprising the steps following: - (E21): automatic determination or by input via a human machine interface of one or more reference (s) of (or) implant (s) concerned (s) by a dental restoration, transmission of this or these data (s) to a calculator; (E22): selection by said calculator of the geometry of at least one dental prosthesis connector adapted to at least one implant of the dental restoration zone 15 concerned among a library stored in an electronic memory; - (E24): transmission of manufacturing commands of at least one connection of the dental prosthesis to a manufacturing device, to manufacture the at least one connector 20 selected by the preceding steps.
    [0017]
    17. A method of manufacturing a dental implant prosthesis, characterized in that it implements the following steps: - (E21): automatic determination or by input through a human machine interface of a or more reference (s) of (or) implant (s) concerned by a dental restoration, transmission of this or these data (s) to a calculator; - (E22): selection by said calculator of the geometry of at least one connector of a dental prosthesis adapted to at least one implant of the dental restoration area 3033491 32 concerned among a library stored in an electronic memory; (E23): optionally, reading in an electronic memory of manufacturing strategy data, such as machining strategies; (E24): transmission of manufacturing commands of at least one connection of the dental prosthesis to a manufacturing device, to manufacture the at least one connector selected by the preceding steps. 10
    [0018]
    18. Device for manufacturing a dental prosthesis on an implant, comprising a tool holder (33) for a tool (31) and a calculator (35), characterized in that it comprises a computer medium comprising a recorded computer program comprising computer program code means for implementing a method for manufacturing a dental implant prosthesis according to the preceding claim, so that the computer (35) transmits control commands to the tool holder (33) to manufacture at least one connector (66), in particular by machining, intended for attachment to at least one implant.
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    同族专利:
    公开号 | 公开日
    FR3033491B1|2020-01-31|
    EP3267935B1|2020-10-14|
    US10945820B2|2021-03-16|
    EP3267935A1|2018-01-17|
    MA41674A|2018-01-16|
    WO2016142325A1|2016-09-15|
    US20180200034A1|2018-07-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20120219930A1|2003-08-07|2012-08-30|Ivoclar Vivadent, Ag|Machining of Ceramic Materials|
    EP2324795A1|2009-11-19|2011-05-25|3M Innovative Properties Company|A method and system for designing a dental restoration|
    EP2444028A1|2010-10-20|2012-04-25|Astra Tech AB|A method of providing a patient-specific dental fixture-mating arrangement|
    US20120177456A1|2011-01-10|2012-07-12|Yunoh Jung|Method for machining a dental prosthesis|
    DE202012012733U1|2011-03-18|2013-10-01|Elos Medtech Pinol A/S|Dental anchor for oral scanning|US9717573B2|2013-11-21|2017-08-01|William C. Vuillemot|In-situ dental restoration process and apparatus|
    US10639132B2|2014-09-12|2020-05-05|Italo Lozada|Dental prosthesis|
    US10624722B1|2019-08-14|2020-04-21|SmileDirectClub LLC|Systems and methods for laser trimming dental aligners|
    FR3100706A1|2019-09-13|2021-03-19|Roux Freres Energie|Dental prosthesis for connecting an intracorporeal organ to an extracorporeal device|
    法律状态:
    2016-03-31| PLFP| Fee payment|Year of fee payment: 2 |
    2016-09-16| PLSC| Search report ready|Effective date: 20160916 |
    2017-03-31| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-30| PLFP| Fee payment|Year of fee payment: 4 |
    2019-03-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-31| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-30| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1551959A|FR3033491B1|2015-03-09|2015-03-09|MANUFACTURE OF A DENTAL PROSTHESIS|
    FR1551959|2015-03-09|FR1551959A| FR3033491B1|2015-03-09|2015-03-09|MANUFACTURE OF A DENTAL PROSTHESIS|
    MA041674A| MA41674A|2015-03-09|2016-03-06|MANUFACTURING OF A DENTAL PROSTHESIS|
    US15/557,270| US10945820B2|2015-03-09|2016-03-07|Production of a dental prosthesis|
    EP16708167.8A| EP3267935B1|2015-03-09|2016-03-07|Production of a dental prosthesis|
    PCT/EP2016/054755| WO2016142325A1|2015-03-09|2016-03-07|Production of a dental prosthesis|
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