• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Surgical guide for the placement of dental implants and tool for the assembly and disassembly of said guide. The purpose of the surgical guide for the placement of dental implants of the invention is to guide the surgeon during the milling of the bone bed of a patient, prior to the placement of an implant within the operation of replacing one or several dental pieces, basically comprising a handle (1) that in at least one of its ends has a hole (2) and a bushing (3) reducing milling that is attached to the handle through said hole (2) and that has a through hole (10). ) circular of constant diameter to allow the adjusted passage of a milling cutter (13) during the drilling operation, a first portion (7) that joins the hole (2) of the handle (1) and a second portion (8) susceptible to adjust by friction to the internal diameter of the guide hole (4) of a splint (5), and where a tool used for the assembly and disassembly of the reducer bushing (3) in the handle (1) composed of a support ( 15) and a tamper (19). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2581403A2
    申请号:ES201530266
    申请日:2015-03-02
    公开日:2016-09-05
    发明作者:Francesc Alsina Font；Antonio LÓPEZ PÉREZ
    申请人:Phibo Dental Solutions SL；
    IPC主号:
    专利说明:

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    DESCRIPTION
    Surgical guide for the placement of dental implants and tool for the assembly and disassembly of said gwa
    Object of the invention
    The object of the present invention is a surgical gwa for the placement of dental implants which aims to guide the surgeon during the milling of the bone bed of a patient, prior to the placement of an implant within the operation of replacing one or several Dental pieces.
    More specifically, the surgical guide of the invention allows the milling to be guided according to the prosthetic planning carried out with an increase in precision and in a personalized way for each patient.
    Likewise, the present invention also includes a tool specially designed for the quick and easy assembly and disassembly of said gwa.
    Background of the invention
    Currently implantology techniques allow the replacement of dental roots by implants, which in turn are coupled with the corresponding prostheses or artificial teeth to rehabilitate the patient's mouth.
    This technique, widely used today, is of special application when the patient needs to replace or replace a dental piece.
    Basically, the phases of dental rehabilitation with implants are summarized in:
    1. an initial phase of surgery where implants that serve as anchors for prostheses of dental pieces that need to be replaced are placed;
    2. a second phase of sampling and measurement of the patient's mouth from
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    which are developed dental models or replicas of the mouth;
    3. a third phase where, from the model of the previous phase, the prosthesis is constructed to replace the dental piece and that will be fixed to the implant of the first phase and, finally
    4. placement of the prosthesis in the mouth.
    The subsequent evolution of the implant assembly plus prosthesis in the patient's mouth and its masticatory functionality will therefore depend largely on each of these stages, and although the stage of fabrication of the prosthesis is fundamental, it is not less that of Taking measurements from the patient's mouth, which should be as accurate as possible.
    Today this measurement or sampling phase can be done in two ways:
    - Manually with the known transfer elements or "transfers" in which the patient is made to bite a deformable material on which the positions and shapes of the dental pieces, enda and, above all, the aforementioned ones will be engraved or marked transfer elements coupled to the implants placed on the patient's enda. These transfer elements will therefore be those that indicate or indicate the position and placement of the implant on which the prosthesis will then be fixed; or
    - Through a digital scan of the patient's mouth, a technique that, although it has recently appeared, has experienced a great boom since with the appropriate technology it is possible to obtain detailed digital information about the patient's mouth, that is, both the geometry of the mouth itself as that of the dental pieces and the implants that may have placed. This information is then transformed into a digital file with which, through the corresponding software, a digital model of the patient's mouth is obtained, which is subsequently used for the manufacture of a physical model of the mouth from rapid prototyping technologies. such as laser sintering, milling, etc.,
    However, as is evident, any of these two ways of taking action
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    they will only be effective if the implants have been placed correctly on the patient's mouth, because as said it will be those that will be scanned or used as support for the mentioned transfer elements.
    In short, that all the work carried out during the fabrication and colocation stages of dental prostheses is seriously compromised if that first stage of implant positioning is defective, dragging an error that could have as a consequence from the bad adjustment to the impossibility of place a prosthesis for implant disparallelism, bone resorption, vestibularization of the implants and occlusion incidents.
    This first phase of implant placement is therefore taken care of especially in order to obtain the most accurate results possible, and more taking into account that it depends largely on the expertise and experience of the surgeon who performs the milling in the bone bed where the implant will be positioned. The positioning, orientation, angulation and depth of milling can be done manually by the surgeon or guided by some existing system.
    In the event that the surgery is guided, prior to that surgery, that is, to the completion of the milling by the surgeon, a splint is made that, based on the information obtained from the patient's mouth, reproduces the part of the enda where the milling is going to be carried out and which also has one or several guide holes located on it that allow the surgeon to guide the milling of the bone bed.
    This splint, which is personal for each patient, is usually designed and produced digitally in a plastic material by a sintering process or similar, where the mentioned guide holes are located in areas raised upwards as a promontory so that they reach a sufficient height to serve as gtia, which internally comprise, as a coating, a cylindrical portion made, in most cases, metallic material.
    Currently existing splints can be divided into three large groups, splints for the start of milling that give an indication of where the implant should be placed, splints that
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    they allow the complete milling sequence forcing the manual placement of the implant and a final group that allows the complete milling sequence and the guided placement of the implant, which would be where the guide of this patent is located.
    On the other hand, said ferula is complemented with a set of milling reducers that, coupled to the guide holes of the ferula, allow these holes to be adapted to the diameter of the different drills so that they adapt as much as possible to these, eliminating clearances and, therefore, performing a better guidance, which results in a more precise milling and therefore a placement of the implant as close as possible to its optimal position.
    These milling reducers consist of also metal bushings, externally coinciding with the inner face of the corresponding guide hole of the ferula - usually cylindrical -, and of cylindrical interior shape, which also complement each other, as can be seen in EP2397103 and EP2060240 with a handle or handle that gives them the form of "teaspoons", a name by which they are commonly known.
    This handle, which is either attached to the milling reducer in an inseparable way or is next to the same piece, allows or facilitates its grasp by the surgeon, who can hold them with one hand while holding the milling with the other.
    Generally, these surgical guides are marketed as a kit, where in addition to a set of strawberries with the necessary diameters, the corresponding milling reducers are provided, with or without the aforementioned spoon shape. That way, the surgeon will have at his disposal all the reducers applicable to each of the strawberries.
    However, although such milling reducers with handles or teaspoons greatly facilitate the surgeon's task due to the aforementioned, they suffer from a series of problems or inconveniences such as those mentioned below.
    - First of all, there is the fact that due to its metallic nature, the clearance or tolerance that the internal diameter that serves as a guide to the milling cutter must have must be sufficient to avoid high friction. To be
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    reusable elements, a less deterioration due to friction that entails a prolonged duration of the same is sought, that is, this tolerance is increased with the use of the guide to the detriment of the precision of the surgery.
    - This clearance is also produced in the outer diameter that is coupled to the guide hole of the splint causing an additional deviation from the desired precision.
    - Secondly, these teaspoons have the handicap of their size, since since they must be incorporated into a case or kit like the one mentioned above, they should not be too large, so that the set is not very large and / or bulky as to be able to include all the necessary ones, that is, one for each of the different existing milling cutters.
    This reduced size, however, results in a worse handling by the surgeon, especially when replacing dental pieces located at the back of the jaw, that is, those located inside the mouth.
    Another document known in the State of the Art is DE202013001415, which refers to a template-guided milling reducing element that in a possible realization includes a spoon-like handle. However, said document is directed to a guiding element that has a metallic master bushing to which a guide or milling bushing, also metallic, which guides the mill during milling, is attached, both being connected by means of a small bayonet joint.
    The system described in this document, however, also suffers from the inconvenience that the metallic nature of the milling reducing sleeve means, which means having to work with certain clearances, to which in this case we must also add the clearance necessary between the reduction bushing and the master, which will be added to the clearance that said master bushing must present and the guided hole of the template or splint located over the patient's mouth.
    In addition, this system has the disadvantage that the bayonet joint causes
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    retention due to the interaction with the different fluids present in the surgery, such as blood, saliva, serum, etc.
    Description of the invention
    The surgical procedure for the placement of dental implants of the present invention solves the aforementioned problems of the state of the art and also constitutes a simple, versatile handling tool adaptable to each user, which achieves a high degree of precision and also It occupies a small space.
    For this, the surgical procedure for the placement of dental implants of the invention basically comprises:
    A handle that serves as a handhold for the surgeon and that, at least one of its ends, has a hole for a single-use and disposable milling reducing sleeve made of biocompatible plastic material, where both are joined through non-retention means. permanent that allow its assembly and disassembly, for which a specially designed tool is described, which is described below.
    As will be seen below, with these characteristics the problems of the state of the art mentioned above are solved.
    Specifically, as far as precision is concerned, the fact that the milling reduction bushing is made of a plastic material has a double reducing effect on tolerances or clearances:
    a) On the one hand, a reduction of the clearances is achieved since the outer diameter of the reducing bushing can be adjusted by friction to the internal diameter of the guide hole of the ferula that conforms to the part of the enda where the milling
    This reduction of clearances, as is logical, implies an increase in the precision in the milling of the bone bed.
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    b) On the other hand, a reduction of the clearance in the inner diameter of the reducing bushing is achieved, since being plastic, friction with the milling cutter is allowed during drilling, which will allow a much tighter guide of the cutter and more accurately.
    c) Finally, the fact that the milling reducer is single is an obvious advantage for the patient, since it ensures the health guarantee avoiding possible contagion.
    Therefore, the present invention, overcoming the prejudice of the state of the art based on avoiding milling reducing bushings made of plastic materials, achieves thanks to using this type of material to significantly reduce the gaps during the milling phase, which results in an evident improvement in the positioning of the implant, facilitating its positioning in the optimal theoretical point for which the splint is designed.
    On the other hand, as already noted, the fact that the reducing bushings are made of plastic material, of an economical cost that allows for the monouso availability for each patient, supposes the advantage that, coupled to a single metal handle, it will be available of so many reducing bushings required by the milling sequence depending on the design for each patient.
    The union between the handle and the milling reduction bushing is carried out through non-permanent retention means that allow the detachable union between the handle and the reducing bushing so that the surgeon can, at any time, attach the reducing bushing to said handle. Correspondingly, and also remove it after milling of the patient's bone bed for implant placement. The assembly and disassembly of the reduction bushing will be carried out with the help of the tool described below, which has been specifically designed for this purpose.
    On the other hand, the reducing bushings will have a variable internal diameter depending on the planned surgical sequence, but a fixed external diameter so that the complementary retention means provided in said bush and in the hole of the handle can cooperate.
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    The union between handle and reducing bushing provided by the aforementioned retention means will guarantee, on the one hand, a firm union during the milling operation and, on the other, a separable union once the operation is finished.
    On the other hand, as already mentioned, for the assembly and disassembly of the reduction sleeve in the handle the present invention also describes a tool designed specifically, which comprises two elements:
    - A support intended to support the handle of the surgical guide prior to placement or removal of the reducing sleeve, and
    - A ram with which, once the guide handle has been placed on the support, either place or remove the reducing sleeve of said handle.
    From all of the above it follows that the surgical guide of the invention constitutes a versatile, easy-to-use, safe tool for the patient and that overcomes the drawbacks of the cited state of the art, adding the following advantages to those already mentioned:
    - Improves the accuracy of implant placement, ensuring the success of the planned prosthetic planning.
    - Turn the guide into modular and versatile and simplified .;
    - Allows the supply of the elements that influence the final precision without increasing costs; Y
    - They result in a health guarantee for the patient as the milling reduction bushings are not reusable.
    - Finally, being removable the reducing sleeves of the handle facilitates cleaning, disinfection and sterilization.
    Description of the drawings
    To complement the description that is being made and in order to help a better understanding of the features of the invention, according to a preferred example of practical realization thereof, it is accompanied as an integral part of said description,
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    A set of drawings where, with an illustrative and non-limiting nature, the following has been represented:
    - Figure 1.- Shows a perspective view of a possible practical realization of the surgical gwa of the invention.
    - Figure 2a.- Shows a perspective view of a possible milling reduction bushing used in the guide of figure 1.
    - Figure 2b.- Shows a perspective view of another possible milling reduction bushing.
    - Figure 3.- Shows an elevation view of the end of the guide of figure 1 showing the bushing, where said bushing is shown sectioned, and a detailed view of the union of said bushing with the handle.
    - Figure 4.- It shows a perspective view of the union of several surgical guides such as the one shown in figure 1 where also a detailed view of the union element of said guides can be seen.
    - Figure 5.- Shows a perspective view of another possible practical realization of the surgical guide of the invention.
    - Figure 6. - Shows a perspective view of the union of several surgical guides as shown in figure 5.
    - Figure 7.- Shows a perspective view and partial section of the surgical guide of the invention in its operative position on a guide splint placed on the patient.
    - Figure 8.- Shows a perspective view similar to that of figure 7 where the drill or milling cutter has also been drawn.
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    - Figure 9.- Shows a perspective view of the two elements that make up the tool used for the assembly and disassembly of the reduction bushing in the handle of the guide of the present invention.
    - Figure 10.- Shows a perspective view of the surgical guide and the tool before being coupled together.
    - Figure 11.- Shows a perspective view of the surgical guide and the tool coupled together.
    - Figure 12.- Finally, it shows an elevation view of the previous figure where a cut has been made to observe the disposition of all the elements when they are coupled.
    Preferred realization of the invention
    As can be seen in the figures, the surgical procedure for the placement of dental implants of the invention basically comprises:
    A handle (1), preferably metallic, although it would serve any material capable of being sterilized, which serves as a handle for the surgeon who at least one of its ends has a hole (2) for joining with a reducing sleeve (3) single and disposable milling, preferably made of plastic material, where both are joined through non-permanent retention means.
    This plastic material must have a series of technical characteristics that allow it to withstand the high friction produced by the milling cutter (13), as well as having good chemical resistance, a good service temperature, structural and dimensional stability, good sliding properties and, in In general, it provides an adequate response to the high mechanical requirements required and is biocompatible and autoclavable.
    For this, the milling sleeve (3) of the invention is preferably manufactured in a thermoplastic, for example in a polyether ketone of the type called PEEK
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    biocompatible
    As already stated, when using a plastic reducing sleeve (3), a reduction of the clearances is achieved since the outer diameter of said bush (3) can be adjusted by friction to the internal diameter of the guide hole (4) of the splint (5) that conforms to the part of the enda (6) of the patient where the milling is to be performed.
    As can be seen in the embodiment shown in the figures, especially in figures 2a and 2bel reduction bushing (3) consists of a cylindrical part comprising a circular through hole (10) of constant diameter that allows the adjusted passage of the cutter (13 ) during the drilling operation, and which externally presents a cylindrical configuration according to a possible embodiment, although it is not ruled out that in another embodiment it could have a polygonal section, which comprises:
    - A first portion (7) intended to be inserted in the hole (2) of the handle (1) of the gtia and, therefore, to constitute the friction adjustment with the inner diameter of the hole (2) of the handle (1) .
    More specifically, as can be seen in the detail of Figure 3, the retention means between the hole (2) and the reducing bushing (3) that allow friction joining are formed by an inverted taper that has the first portion (7 ), so that the area of greater diameter, is located higher than the area of smaller diameter, ensuring this taper the retention of the piece.
    - A second portion (8) of constant diameter such that it also adjusts by friction the internal diameter of the guide hole (4) of the ferula (5) and of variable height depending on the height of said guide hole (4).
    - A wall or perimeter flange (9) that serves as a stop for the adjustment between the reducing bushing (3) and the hole (2) of the handle (1).
    According to a first embodiment of the reducing bushing (3) shown in Figure 2a, the wall (9) is located between the first portion (7) and the second portion (8), so
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    which will serve as a stop when inserting the bushing (3) reducer in the hole (2) of the gwa through the bottom. Specifically, this assembly can be seen in Figures 3 to 8.
    According to a second embodiment of the reducing bushing (3), shown in Figure 2b, the wall (9) is located above the first portion (7), the second portion (8) being left at the bottom of the bushing, that is to say , which is the first portion (7) that is located between the wall (9), which limits it above, and the second portion (8), which limits it below. In this case, therefore, said wall (9) will serve as a stop when introducing the reducing bushing (3) into the hole (2) of the guide at the top.
    In addition, as can be seen in the figures, the handle (1) is capable of having a second hole (2) located at its other end to allow the surgeon the insertion of a second reducing sleeve (3) that provides, in the same spoon, two different guides that you can alternate according to your criteria and the needs of the intervention.
    On the other hand, and as can be seen in figures 4 and 6, any of the holes (2) can be used to obtain surgical guides or teaspoons of greater length without simply associating or splicing several handles (1) with each other. means of a connecting element (11) in order to facilitate milling to the surgeon in those cases in which said milling is either further away from the usual, or has little space for the hand holding the handle ( one).
    This connection element (11), which can be seen especially in the detail of figure 4, will be arranged in such a way that it allows the relative rotation between both handles (1). For example, and as can be seen in said figure, it could have a cylindrical shape with two recessed ends (11 ') intended to be housed in the holes (2) of the handles to be spliced, constituting its central part (11 ''), larger in diameter than the recessed ends (11 '), two stops on which the respective handles will support and rotate.
    Said handles (1) may also be completely flat as shown in figures 5 or 6 or with one or several steps (12) as can be seen in figures 1, 4, 7 and 8, by
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    which in the latter case, the ends of said handles (1) will be placed on parallel but not coincidental pianos, one above the other. This will allow the surgeon to save a slope, either using a single handle (1), that is, a single surgical gwa, or two splices as shown in Figure 4, where the saved slope will be greater.
    On the other hand, in Figures 9 to 12 a possible practical realization of the tool used for the assembly and disassembly of the reducing bushing (3) in the handle (1) is observed when said bushing presents the configuration shown in Figure 2.b , of the present invention, which comprises two elements:
    - A support (15) intended to support the handle (1) of the surgical guide prior to placement or removal of the reducing sleeve (3), which in turn said support (15) comprises:
    o A support surface (16) on which the handle (1) of the guide rests; o A flange (17) that limits the support surface (16) so that the handle
    (1) fit into it limiting its movement during assembly and disassembly;
    o A cavity (18) corresponding to the area where the hole is located
    (2) of the handle (1) and whose depth is such that it allows the housing of the second portion of the reducing bushing (3), where also the upper edge of said cavity is such that it allows the support of the wall (9).
    A ram (19) comprising a handle (20) from which extends a rod (21) that is topped at its other end by a pusher and extractor platform (22) that has a circular recess (23) in which hook the wall (9) either for the assembly or for the disassembly of the bushing (3) reducer.
    Finally, and as can be seen in Figure 8, the surgical guide of the invention may cooperate with other elements such as milling stops (14) that limit the length of the strawberry in the patient's bone bed, that is, , drilling depth.
    权利要求:
    Claims (15)
    [1]
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    1. - Surgical Gwa for the placement of dental implants comprising:
    - a handle (1) that at least one of its ends has a hole (2), and
    - a sleeve (3) milling reducer that joins the handle through said hole
    (2),
    characterized in that it comprises non-permanent retention means for the union between the handle (1) and the milling sleeve (3) and because said milling sleeve (3) is disposable and is made of a biocompatible and sterilizable plastic material .
    [2]
    2. - Surgical guide for the placement of dental implants according to claim 1, characterized in that the reducing sleeve (3) comprises:
    - a circular through hole (10) of constant diameter to allow the adjusted passage of a milling cutter (13) during the drilling operation;
    - a first portion (7) that joins the hole (2) of the handle (1) through the non-permanent retention means; Y
    - a second portion (8) capable of adjusting to the internal diameter of the guide hole (4) of a ferula (5).
    [3]
    3. - Surgical guide for the placement of dental implants according to claim 1 or 2, characterized in that the non-permanent retention means between the sleeve (3) and the hole (2) of the handle (1) are by means of a friction adjustment.
    [4]
    4. - Surgical guide for the placement of dental implants according to any of the preceding claims 2 or 3, characterized in that the reducing sleeve (3) has a wall (9) that serves as a stop for the adjustment between the sleeve (3) reducer and the hole (2) of the handle (1).
    [5]
    5. - Surgical guide for the placement of dental implants according to claim 4, characterized in that the wall (9) is located between the first portion (7) and the second
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    portion (8).
    [6]
    6.- Surgical Gwa for the placement of dental implants according to claim 4, characterized in that the first portion (7) is located between the wall (9) and the second portion (8).
    [7]
    7. - Surgical guide for the placement of dental implants according to any of the preceding claims 2 to 6, characterized in that the first portion (7) of the reducing sleeve (3) has an inverted taper for friction adjustment.
    [8]
    8. - Surgical guide for the placement of dental implants according to any of the preceding claims, characterized in that the handle (1) has a second hole (2) located at its other end.
    [9]
    9. - Surgical guide for the placement of dental implants according to claim 5, characterized in that it comprises a connecting element (11) capable of being lodged simultaneously in two holes (2) for joining several handles (1) to each other.
    [10]
    10. - Surgical guide for the placement of dental implants according to claim 6, characterized in that the connecting element (11) is in such a way that it allows the relative rotation between both handles (1).
    [11]
    11. - Surgical guide for the placement of dental implants according to any of the preceding claims, characterized in that the ends of the handle (1) are located in parallel planes not coincident.
    [12]
    12. - Surgical guide for the placement of dental implants according to any of the preceding claims, characterized in that the milling sleeve (3) is made of biocompatible plastic material.
    [13]
    13. - Tool for the assembly and disassembly of a surgical guide as described in claims 1 to 4 and 6 to 12, characterized in that it comprises
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    - A support (15) intended to support the handle (1) of the surgical gwa prior to the placement or removal of the reducing sleeve (3); Y
    - A ram (19) with which, once the handle (1) of the guide is placed on the support (15), place or remove the reducing bushing (3) in / from the hole (2) of said handle (1) .
    [14]
    14. - Tool for the assembly and disassembly of a surgical guide according to claim 13, characterized in that the support (15) comprises:
    o A support surface (16) on which the handle (1) of the guide rests; o A flange (17) that limits the support surface (16) so that the handle
    (1) fit into it limiting its movement during assembly and disassembly;
    o A cavity (18) corresponding to the area where the hole is located
    (2) of the handle (1) and whose depth is such that it allows the housing of the second portion of the reducing bushing (3), where also the upper edge of said cavity is such that it allows the support of the wall (9).
    [15]
    15. - Tool for the assembly and disassembly of a surgical guide according to claim 13, characterized in that the ram (19) comprises a handle (20) from which extends a rod (21) terminated at its other end by a pusher platform and extractor (22), where said pusher and extractor platform (22) has a circular recess (23) in which to engage the wall (9) of the reduction bushing (3) for its assembly or disassembly.
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    RU2017133967A|2019-04-02|
    CO2017007901A2|2018-01-05|
    AR104481A1|2017-07-26|
    RU2017133967A3|2019-08-13|
    CR20170396A|2018-05-14|
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    法律状态:
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    ES201530266A|ES2581403B9|2015-03-02|2015-03-02|SURGICAL GUIDE FOR PLACEMENT OF DENTAL IMPLANTS AND TOOL FOR ASSEMBLY AND DISASSEMBLY OF SUCH GUIDE|ES201530266A| ES2581403B9|2015-03-02|2015-03-02|SURGICAL GUIDE FOR PLACEMENT OF DENTAL IMPLANTS AND TOOL FOR ASSEMBLY AND DISASSEMBLY OF SUCH GUIDE|
    EP16709984.5A| EP3266405A1|2015-03-02|2016-03-01|Surgical guide for the placement of dental implants, and tool for mounting and removing said guide|
    PCT/ES2016/070134| WO2016139382A1|2015-03-02|2016-03-01|Surgical guide for the placement of dental implants, and tool for mounting and removing said guide|
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    MX2017010174A| MX2017010174A|2015-03-02|2016-03-01|Surgical guide for the placement of dental implants, and tool for mounting and removing said guide.|
    RU2017133967A| RU2017133967A3|2015-03-02|2016-03-01|
    US15/549,567| US20180028278A1|2015-03-02|2016-03-01|Surgical guide for the placement of dental implants and tool for the assembly and disassembly of the guide|
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    CONC2017/0007901A| CO2017007901A2|2015-03-02|2017-08-03|Surgical guide for the placement of dental implants and tool for the assembly and disassembly of said guide|
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    CL2017002025A| CL2017002025A1|2015-03-02|2017-08-08|Surgical guide for the placement of dental implants and tool for the assembly and disassembly of said guide|
    GT201700197A| GT201700197A|2015-03-02|2017-09-01|SURGICAL GUIDE FOR PLACEMENT OF DENTAL IMPLANTS AND TOOL FOR ASSEMBLY AND DISASSEMBLY OF SUCH GUIDE|
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