• 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:
    The invention relates to a device (1) for positioning and fixing a manipulation implant (3; also called adapter sleeve) in a working model (2), as well as sets comprising at least one device, at least one corresponding manipulating implant and possibly a corresponding working model. Manipulina implants are aids for the production of a denture.
    公开号:CH714969A1
    申请号:CH5712018
    申请日:2018-05-07
    公开日:2019-11-15
    发明作者:Schönenberger Alwin
    申请人:Denta Vision Gmbh；
    IPC主号:
    专利说明:

    Description of the invention is a special device for positioning and fastening a manipulation implant (also called adapter sleeve) in the working model.
    A dental implant is an artificial tooth root that is permanently implanted (= implanted) in the jawbone. The implant serves as a support or anchoring point for prosthetic dentures (prosthetics). The implant and prosthetics together form the complete denture, which usually consists of at least three parts: the artificial tooth root (the actual implant), which is anchored in the bone, a connecting piece (abutment) and the prosthetic denture. For the fabrication of prosthetic dentures on implants, the dental technician begins with the production of the so-called working model, which is created on the basis of the analog or digital jaw impression supplied by the dentist. The main steps in the manufacture of prosthetic dentures are carried out on the working model. The working model simulates the patient's jaw situation, in which the denture is to be integrated.
    Depending on the dental prosthesis to be manufactured, one or more manipulation implants, which are also referred to as model analogs or laboratory analogs, are used in the working model. Manipulation implants are precision mechanical workpieces that take on the role of implants in the working model. The manipulation implants are not part of the dentures to be created, but only aids to the creation of the dentures. The model analogue forms the basis for the fabrication of the prosthetic dentures. The position of the manipulation implants is determined by the jaw impression provided by the dentist with the implants. The precise representation of the positions of the implants is crucial for the further manufacture of the denture. The manipulation implants do not or hardly protrude from the working model, just as the implants do not protrude or hardly protrude from the corresponding jaw area of the patient. The size of the shoulder area and the internal configuration of the manipulation implants correspond to the original implant (s) in the mouth. For the manufacture of a denture that is carried or secured by implants, the transfer of the oral situation to the working model is essential. This transfer must be carried out with the best possible accuracy.
    It is therefore desirable to position and fix the manipulation implant in the working model so that the three-dimensional position of the implant in the mouth is correctly simulated. In addition, the manipulation implant should not be permanently connected to the working model for practical reasons, but should be detached from the model if necessary and then be precisely repositioned again. This process should be repeatable any number of times and lead to reproducible results.
    [0005] The following methods and devices for the transfer and positioning of a manipulation implant in the working model are known in the prior art:
    In the conventional production of the working model from model mass, e.g. Gypsum, a working model is created by pouring model mass into the impression. For this purpose, the manipulation implants are previously repositioned / positioned correctly in the silicone impression in the impression and then cast around with the model mass. The model created in this way is then hardened. The manipulation implants must be embedded in the model mass so that they correspond to the position of the implant in the patient's mouth and do not move. For this purpose, the manipulation implant has apical retention portions, e.g. Undercuts. When a working model is made from plaster, this retention component is firmly anchored in the plaster and the manipulation implant is thereby firmly fixed in the model. This procedure can only be used for conventional impression techniques in combination with conventional model fabrication, since only with these procedures can the fabrication of the model and the attachment of the manipulation implant take place simultaneously. In the case of models that are produced using the 3D printing process, however, the manipulation implant is only positioned in the model after the printing process has been completed. In addition, firmly positioned manipulation implants are not very practical because they cannot be removed from the working model and repositioned.
    In the case of working models milled or printed in the CAD / CAM method, a standardized adapter bore or a cutout corresponding to the shaft size of the manipulation implant is generally introduced into the working model in accordance with the position and axis inclination calculated by the scanning process. This hole / recess then receives the corresponding manipulation implants. These manipulation implants generally cannot be clearly positioned in the preformed bore, even if the stem of the manipulation implants is equipped with unique rotation-protecting, geometric elements such as a vertical, straight surface in the lower part of the shaft, since the creation of the recess is subject to manufacturing tolerances (with 3D printing or with a milled model), which allow a play of the manipulation implant and thus an ambiguous positioning.
    The manipulation implant can be lifted out of this hole if necessary and then repositioned again. However, if this procedure is often repeated in the course of the manufacturing process, the walls of the bore can wear out, which leads to a decrease in the frictional fit and - worse - to a changed position of the manipulation implant in the model. In particular, deviations in the vertical direction (z-axis) have a negative impact. The manipulation implant can sink correspondingly lower due to pressure.
    In the prior art, the risk of wear is controlled by inserting an adapter sleeve. This sleeve must be fixed in a corresponding hole / recess in the model and takes the manipulation implant
    CH 714 969 A1 fits perfectly. Thanks to this precaution, the manipulation implant can be correctly repositioned in the model at any time. However, the following 3 points have proven to be problematic with this method: 1) the correct anchoring of the sleeve in the model, 2) the insufficient holding of the manipulation implant in the sleeve (if the model is turned over, the manipulation implant loosens under the influence of gravity) , 3) the control over the vertical position of the manipulation implant (z-axis) is difficult since the manipulation implant is only held in the sleeve by a free fit. The manipulation implant can sink correspondingly lower due to pressure.
    Various manufacturers have tried to correct the problem of the insufficient hold of the manipulation implant in the sleeve by attaching an apical forehead screw. However, this forehead screw prevents efficient work, since whenever the manipulation implant is to be removed, the screw must also be loosened. An adapter sleeve is not intended for this method. The guidance of the manipulation implant is guaranteed directly by the model material. If the model material is easily deformable, the position of the manipulation implant can vary depending on the tightening force of the forehead screw. Structures that are intended to guarantee the fit of the manipulation implant and its fixation by the forehead screw (e.g. the thread) are heavily worn out.
    In view of the problem described, an object of the present invention is to provide an improved device for positioning and fastening a manipulation implant (also called adapter sleeve) in the working model or laboratory analog (in particular a printed model), which enables exact positioning in the working model that can be restored at any time ,
    The object is achieved by a device for positioning a manipulation implant for the manufacture of a dental prosthesis in a working model, the device having a non-rotationally symmetrical base area, coronally having a shoulder, and wherein the outer surface of the device below the shoulder has an average roughness of 1-10 μm.
    The term “coronal” as used herein denotes an arrangement on the tooth crown or towards the tooth crown. The outer surface of the devices according to the invention has an average roughness (R a ) of 1-10 μm and preferably of 2-5 μm in the area below the shoulder. The surface of the devices according to the invention is preferably designed in such a way that all sections except that below the shoulder are smooth. Surfaces are referred to as smooth if they have no visible or noticeable bumps or whose average roughness R a is less than 0.1 μm, preferably less than 0.01 μm. It is particularly preferred that the outer surface of the shoulder and the section located coronally therefrom is smooth.
    The feature of the non-rotationally symmetrical base surface excludes in particular round devices or adapter sleeves or devices with a round or almost round cross section. The base area of the devices according to the invention should preferably have a maximum of four axes of rotation and even more preferably a maximum of three axes of rotation. The base areas or cross sections of the devices according to the invention particularly preferably have only one or no axis of rotation. It is also preferred that the base is a triangle, and still more preferably a triangle that is not equilateral. However, the devices according to the invention can also have a base area which represents a circle with an incision, as shown in FIGS. 2A and 2D. It is also preferred that any edges / corners are rounded. A preferred base is a not isosceles triangle with rounded corners.
    [0015] The devices according to the invention have a recess per se for receiving the manipulation implant. This recess for receiving the manipulation implant preferably has a base area that is not rotationally symmetrical. It is further preferred that the base of the recess has the same shape as the base of the device itself, the diameter of course being smaller on the inside. The outer and inner contours are therefore preferably identical. If the device is a triangular sleeve, the recess is also preferably a triangular recess. The wall of the devices or adapter sleeves according to the invention is preferably between 0.1 and 1 mm and more preferably between 0.3 and 0.6 mm thick. A preferred embodiment of the devices according to the invention has a wall thickness between 0.3 and 0.6 mm. It is also preferred that the wall thickness decrease coronally of the heel. It is preferably 0.1-0.5 mm.
    The heel of the devices according to the invention forms a support surface for the manipulation implant, which preferably runs horizontally to the wall of the device. The paragraph is preferred. 0.1-0.4 mm wide. It preferably extends around the entire scope of the devices according to the invention. The shoulder preferably forms one or two 90 degree angles, but can also have other angles. Preferred angles are> 90 degrees. Angles of 90 degrees, 135 degrees, 150 degrees and 160 degrees are particularly preferred. According to the invention, steps which have angles of 90 degrees are very particularly preferred.
    [0017] The devices according to the invention preferably consist of a dimensionally stable material. The material of the device or adapter sleeve should be selected so that, as far as possible, no permanent deformation can take place due to external stress. It should therefore have low formability. Low plastic deformability is particularly desirable. But the elasticity should also be low. Brittle materials are generally suitable. It is preferred if the material of the device according to the invention is selected from the group consisting of: metals and metal alloys, ceramic (high-strength glass ceramic), ceramic composite, PEEK and polycarbonate. Metals and alloys such as titanium, stainless steel or Cr-Co alloys are particularly preferred.
    CH 714 969 A1 In a further preferred embodiment, the device according to the invention has at least one position definition element. This position definition element preferably indicates correct positioning of the manipulation implant in the device according to the invention. This can e.g. be an acoustic signal (audible click). The position definition element is preferably a position definition element with a position securing function (holding device). This means that not only is it displayed that the correct position has been taken, but also the position should be held or saved. This can e.g. using magnets, an interlocking holding device and / or locking elements (e.g. bayonet lock). Locking is also an option. Latches are mainly used for locking.
    A preferred embodiment is a device according to the invention, wherein the position definition element also has a position securing function and is preferably an interlocking holding device. The position definition element with or without position securing function is preferably arranged on the side and particularly preferably does not consist of an element that is screwed on. It is preferred that devices according to the invention have a holding device which is designed as at least one nose arranged on the inside of the device, which engages in a correspondingly arranged receptacle on the manipulation implant and thus determines the position and orientation of the manipulation implant in the device (adapter sleeve). In addition, a device according to the invention is preferred, the holding device of which is designed as at least one lateral nose extending in parallel longitudinal extension to the device, which can engage in correspondingly arranged groove-shaped receptacles in the wall of the manipulation implant and thus determine the position and orientation of the manipulation implant in the device ,
    A further aspect of the invention relates to sets comprising at least one device according to the invention (adapter sleeve) and at least one corresponding manipulation implant, the manipulation implant having a region which can be inserted in the at least one device in a form-fitting and / or rotationally secure manner. The devices according to the invention therefore preferably have a cutout for a corresponding manipulation implant. A rotationally secure fit is ensured on the one hand by the geometry of the base of this recess and the precisely fitting base of the manipulation implant, and on the other hand also preferably by a position definition element with a position securing function. It is therefore preferred that the set has at least one device according to the invention and at least one corresponding manipulation implant, the inside diameter of the device being only slightly larger than the outside diameter of the manipulation implant. The shoulder of the devices according to the invention forms a support surface for the manipulation implant. It is therefore further preferred that the set has at least one device according to the invention and at least one corresponding manipulation implant, the manipulation implant having a shoulder. This shoulder is preferably congruent with the shoulder of the at least one device according to the invention. This means that it should have the same angles and enable the manipulation implant to rest seamlessly on the shoulder (the inner bearing surface formed by the shoulder) of the at least one device according to the invention. It is also preferred that the set has at least one device according to the invention and at least one corresponding manipulation implant, the device according to the invention having a holding device and the manipulation implant having the corresponding counterpart, or vice versa. One aim of the holding device is to provide a further element that can guarantee a unique position in the direction of the z-axis. A locking device, in which a mechanism falls into a specific position and remains, is preferred. For example, the device according to the invention can have a spring element which snaps into a recess in the manipulation implant.
    [0021] A preferred set according to the invention additionally contains a working model. This working model preferably has at least one recess, which is characterized in that the device can be inserted congruently into the working model. For this purpose, the outer geometry of the device according to the invention (adapter sleeve) is preferably designed to correspond to analog receptacles (adapter bores) of the working model. The working model of the set according to the invention can be an analog working model, a working model from the SD printing process or a CAD milled working model. The device according to the invention can equally be used in different working models, from all known manufacturing processes, without changes to the device being necessary. In particular, the positioning of a manipulation implant by means of the device according to the invention in a silicone impression, created using the analog method, is also possible.
    The geometry is also intended to ensure rotation-safe insertion of the devices in the receptacles of the working models. Therefore, the recordings are preferably not round. They also preferably have an inner geometry that corresponds to the outer geometry of the devices according to the invention. Only the diameter should be slightly larger. The recording of the working model should also have a taper corresponding to the paragraph of the device according to the invention. The working model thus preferably has a shoulder on which the heel of the device according to the invention comes to lie (precisely fitting). The arrangement of the manipulation implant in the device according to the invention and in the working model is preferably designed such that although the manipulation implant can be ejected as simply as possible, the manipulation implant cannot fall out unintentionally (not even together with the adapter sleeve). Even when ejecting, the device should not slip in the working model.
    A preferred embodiment of the invention relates to a set comprising at least one device according to the invention, at least one corresponding manipulation implant and a working model, the working model having a window which is at the level of a shoulder on which the heel of the at least one device comes to rest ,
    CH 714 969 A1
    This window can be a simple, arbitrarily shaped recess. However, the window is preferably 2-3 mm high and 2-3 mm wide. It can also be an element that can be removed and reinserted. The window should allow a clear view of the device according to the invention in the working model at the level of the heel (the device according to the invention) or the shoulder (of the working model). It is advantageous to check the support of the device according to the invention on the shoulder, since a precise fit of the device according to the invention in the area of the shoulder or shoulder ensures the correct positioning of the device according to the invention along the z-axis. In the event that the hold of the adapter sleeve in the working model is sometimes not guaranteed, the adapter sleeve and the working model could be glued to this access.
    Brief Description of the Figures
    1: shows a longitudinal section of a device (1) according to the invention in the working model (2) with a manipulation implant (3) inserted and on the left the cross section a of the device according to the invention with a manipulation implant inserted.
    2: shows further possible base areas of the devices according to the invention, or cross-sections of devices according to the invention with a manipulation implant inserted.
    3: shows a longitudinal section of a device (1) according to the invention in the working model (2) and with a manipulation implant (3) inserted, a window (8) being visible in the working model (2).
    Description of preferred embodiments Fig. 1 shows a device according to the invention (adapter sleeve (1)) in a working model (2; plaster or 3D). The adapter sleeve (1) shows coronally a protruding edge (paragraph (5)), which is smoothly polished and guarantees the correct z-axis position. In its final position, the shoulder of the adapter sleeve must lie precisely on the corresponding shoulder in the working model (2). The adapter sleeve (1) extends further beyond this edge to guide the manipulation implant (3) (free fit). The outer shape of the sleeve has the shape of an isosceles triangle, as can be seen in cross section a in FIG. 2. This triangle also has rounded edges. The geometry of the base area of the adapter sleeve (1) should be selected so that it can be clearly positioned in the working model (3). In particular, a slight or free rotational movement should be avoided. On the inside, the sleeve is equipped with at least one holding device (6) which holds the manipulation implant used in position, but nevertheless enables controlled ejection and repositioning (in the z-axis). The manipulation implant (3) shown has a notch (7) on the bottom for easier ejection. The inner geometry of the adapter sleeve (1) corresponds to the outer geometry of the manipulation implant (3) so that the manipulation implant can be positioned in a rotationally stable manner with respect to the x and y axes. As a counterpart to the holding device (6), the manipulation implant (3) has one or more slot-like notches. They allow the holding device to be snapped into place. The geometry, including the shoulder (5), of the device (1) according to the invention for positioning a manipulation implant (3) for producing a dental prosthesis in a working model (2) ensures that the manipulating implant (3) in the working model (2) is positioned correctly and reproducibly in all three Axes (x, y, z). In addition, the holding device (6) offers a good hold, a clear, controllable (audible click) positioning and simple handling (uncomplicated entry and exit).
    In Fig. 2 some possible base areas of a device according to the invention with a corresponding manipulation implant are shown by way of example. These base areas must not be rotationally symmetrical. In A the area is round, but has an incision that affects approximately a quarter of the circular area. The cross section in B relates to a manipulation implant with a base area that is semicircular, the device according to the invention comprising slightly more than a semicircle. The base in C is a trapezoid, so it also has 1 axis of rotation. 2D, the circular base also has an incision so that it is not rotationally symmetrical. In Fig. 2E, the circular base has an outward widening so that it is not rotationally symmetrical. As a result, the respective device can be inserted in a corresponding recess in the working model in a rotationally secure manner. The positioning of the manipulation implant in the adapter sleeve is preferably also rotationally secure over a congruent base area.
    Fig. 3 shows an adapter sleeve (1) with a manipulation implant (3) in a working model (2). The correct fit of the adapter sleeve (1) can be checked visually via a side window (8) in the working model (2). If necessary, the window (8) can also be used as access to the adapter sleeve (1) in order to fix the seat of the adapter sleeve (1) on the heel (5) by means of adhesive.
    权利要求:
    Claims (9)
    [1]
    claims
    1. A device for positioning a manipulation implant (2) for producing a dental prosthesis in a working model (3), the device (1) having a non-rotationally symmetrical base, coronal a shoulder
    CH 714 969 A1 (5), and wherein the outer surface of the device (1) below the shoulder (5) has an average roughness of 1-10 microns.
    [2]
    2. The device according to claim 1, wherein the device (1) has a recess for receiving the manipulation implant (2), the base of which is also not rotationally symmetrical.
    [3]
    3. The device according to claim 1 or 2, wherein the device (1) consists of metal.
    [4]
    4. The device according to one of claims 1 to 3, wherein the device (1) consists of stainless steel or titanium.
    [5]
    5. The device according to one of claims 1 to 4, wherein the device (1) has a position definition element.
    [6]
    6. The device according to claim 5, wherein the position definition element also has a position securing function and is preferably an interlocking holding device (6).
    [7]
    7. A set comprising at least one device according to one of claims 1 to 6 and at least one manipulation implant (2) for producing a dental prosthesis, the manipulation implant (2) having a region which can be inserted in a form-fitting manner in the at least one device (1).
    [8]
    8. The set according to claim 7, which additionally contains a working model (3), the working model (3) having at least one recess, which is characterized in that the device (1) can be inserted congruently into the working model (3).
    [9]
    9. The set according to claim 7 or 8, wherein the working model (3) has a window (8) which lies at the level of a shoulder on which a shoulder (5) of the at least one device (1) comes to rest.
    CH 714 969 A1
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    同族专利:
    公开号 | 公开日
    CH714969A9|2020-01-15|
    WO2019215113A1|2019-11-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4801264A|1987-07-23|1989-01-31|Ipco Corporation|Dental pin and bushing assembly|
    US5658147A|1995-09-19|1997-08-19|Shopvest, Inc.|Working model for prosthodontic preparation of a crown for installation on an implant fixture|
    法律状态:
    2020-01-15| PK| Correction|Free format text: BERICHTIGUNG: RECHERCHENBERICHT. |
    2021-03-31| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    CH00571/18A|CH714969A9|2018-05-07|2018-05-07|Device for positioning a manipulation implant in the working model.|CH00571/18A| CH714969A9|2018-05-07|2018-05-07|Device for positioning a manipulation implant in the working model.|
    PCT/EP2019/061607| WO2019215113A1|2018-05-07|2019-05-07|Device for positioning an implant analog in the laboratory model|
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