JAW IMPLANT

Description

[0001] The invention relates to a jaw implant with at least one approximately U-shaped perforated strip which carries spaced-apart fastening holes.

[0002] DE 10 2015 122 800 B3 already discloses a jaw implant with a support structure that has at least one attachment section that follows the outer bone structure and can be screwed to a jawbone. At least one base protrudes widely from the attachment section, which is designed to receive a prosthesis directly or using an intermediate part, also known as an abutment. Since the previously known jaw implant, with its bases that protrude widely from the attachment section, represents a three-dimensional structure, individual production and adaptation of the previously known jaw implant is necessary for each individual patient.For this purpose, the previously known jaw implant is manufactured in a process which, in a first process step, provides for the recording of individual patient data, for example with regard to the bone and soft tissue configuration of the patient as well as the respective outer contour in the area of ​​the jaw with the aid of an MRI or CT, before the support structure with the protruding bases is manufactured on the basis of this individual patient data using CAD or CAM technology, preferably using laser sintering production.

[0003] WO 2016 / 198935 A1 describes a jaw implant for oral, subperiosteal placement above the alveolar ridge of the maxilla or mandible, wherein the implant forms a body which, in cross-section in the state in which it has been placed on the alveolar ridge transversely to the alveolar ridge, is shaped concavely towards the alveolar ridge, such as J-shaped, L-shaped or U-shaped, wherein in or near a first section forming the base of the body, in particular forming the base of the J, L or U, the body is provided with one or more support areas for support elements, such as columns, to extend through the gingiva, wherein the support areas are formed integrally with the body, wherein the support elements form a support for an exo-prosthesis, such asa dental prosthesis or dentures, wherein the supporting regions are connected to the rest of the body via relatively weakened regions of the body, in particular are connected to the rest of the body only via these relatively weakened regions of the body.

[0004] US 2010 / 069973 A1 discloses a bone plate with a first U-shaped perforated strip and a second perforated strip which is connected to the first perforated strip via connecting webs, wherein the first perforated strip is designed to be free of sockets, pins and sleeves.

[0005] Since the jaw implant known from DE 10 2015 122 800 B3 is a personalized implant that requires a complex manufacturing process, the use of the prior art known from DE 10 2015 122 800 B3 represents a significant limitation for the patient. Patients, who are often elderly, ill, or suffering from a tumor, must initially make do with a temporary solution that cannot be loaded, while the implant manufactured according to DE 10 2015 122 800 B3 is only available at a later date. Since the remaining lifespan may be short, especially for sick individuals, this procedure with the known implant represents a significant limitation for the patient.

[0006] The object is therefore to create a jaw implant with which an upper or lower jaw that has at least one gap in the area of ​​the teeth and, where appropriate, also the jawbone can be treated. The jaw implant according to the invention is intended to enable rapid and short-term treatment that restores the jaw's load-bearing capacity immediately after treatment. The object is also to create a treatment that, with the aid of such a jaw implant, ensures that the function of the jaw and its load-bearing capacity can be quickly restored after treatment. The jaw implant according to the invention and the associated treatment method are intended to be equally suitable for humans and animals in need of treatment.

[0007] The inventive solution to this problem consists in the features of the valid patent claim 1.

[0008] The jaw implant according to the invention has at least one U-shaped perforated bar with spaced-apart fastening holes intended for mounting the jaw implant on the patient's jawbone and, in addition to or instead, for attaching a denture. Cross-sectional weakenings are provided at the intervals between adjacent fastening holes, which facilitate deformation and shape adaptation of the at least one perforated bar in accordance with the external bone structure and are also intended for cutting the at least one perforated bar to length. Since the perforated bar can be cut to length at the cross-sectional weakenings as needed, the jaw implant according to the invention can be mass-produced or even industrially in large quantities and subsequently adapted to the individual conditions in the area of ​​the jaw to be treated, even during a single treatment appointment.While the fastening holes provided at the free ends of the approximately U-shaped perforated strip can only be used to fix and screw the jaw implant to the jawbone, the perforated strip has a cross-sectional thickening in a section spaced apart from the free ends of this perforated strip, in the area of ​​each fastening hole with an internal thread, which increases the longitudinal extent of this fastening hole. These cross-sectional thickenings in the area of ​​the perforated strip supporting the denture allow the denture to be screwed firmly and load-bearing to the perforated strip without the need for protruding fastening bases, pins, or sleeves.

[0009] According to the invention, the at least one perforated strip forms an internal first perforated strip, which is connected to at least one external second perforated strip via connecting webs at least on one side, and preferably on both sides. This allows the at least one perforated strip to be easily deformed and / or cut to length at the waist-shaped cross-sectional weakenings, if necessary.

[0010] The jaw implant according to the invention can have a single, likewise U-shaped second perforated bar, which borders the inner first perforated bar and is connected to it via connecting webs. However, an embodiment in which the inner first perforated bar is connected on both sides to an outer second perforated bar is preferred.

[0011] A preferred development, in which the first and / or the second perforated strip can be easily deformed and / or cut to length at the waist-shaped cross-sectional weakenings if necessary, provides that the first and / or the second perforated strip has a link-chain-shaped outer contour with a preferably rounded formation arranged in the area of ​​each fastening hole and a waist-shaped indentation designed as a cross-sectional weakening between adjacent fastening holes.

[0012] To ensure that the denture can be mounted in a rotationally fixed manner to the fastening hole provided in the area of ​​a cross-sectional thickening, it is advantageous if the cross-sectional thickening has a non-circular outer contour. A preferred embodiment is one in which at least one cross-sectional thickening is configured as a single-sided or double-sided material thickening of the first inner perforated strip, which material thickening preferably has a circular segment-shaped outer contour with outer lines or chords arranged on opposite sides toward adjacent cross-sectional thickenings.

[0013] According to the invention, the first perforated bar is designed without a base, tenon, or sleeve. This allows the jaw implant according to the invention to be manufactured simply and easily adapted to the individual circumstances of a patient during treatment. A particularly advantageous development according to the invention provides that the first and / or second perforated bar has a reduced bar cross-section in a central region of its longitudinal extent and, in contrast, has a thickened or enlarged bar cross-section towards its free end regions. This bar cross-section, which is also dogbone-shaped, ensures that the perforated bars of the jaw implant according to the invention only rest against the patient's jaw in the region of the free bar ends, while the remaining, and in particular the central, parts of the jaw are subjected to less stress, which thus continue to have sufficient blood flow.

[0014] In order to be able to dose the force applied to secure the jaw implant to the jaw using the fastening screws, and to avoid excessive fastening of the jaw implant to the jaw, it is advantageous if the fastening holes provided at the free end areas of the first perforated bar and intended for fastening the first perforated bar to the jaw also have an internal thread. The manufacture of the jaw implant according to the invention and its adaptation to the individual circumstances of a patient is facilitated if the second perforated bar(s) is / are adapted to the shape of the U-shaped, internal first perforated bar.

[0015] In order to be able to use only the first inner perforated strip of the jaw implant according to the invention if necessary or to fasten it only with the second perforated strip connected to one of the two long sides of the first inner perforated strip, it is advantageous if the jaw implant is designed to be cut to length and / or deformable in the region of its connecting webs.

[0016] One embodiment of the invention provides that the jaw implant is designed to be deformable in the region of its connecting bars, such that the inner first perforated bar can be mounted on the alveolar ridge, while the outer second perforated bar(s) can be attached to the adjacent outer flank of the jaw. The jaw implant according to the invention can be easily manufactured from metal or any other suitable material. It may be advantageous if the jaw implant is made of a preferably reinforced, and in particular fiber-reinforced, plastic.

[0017] The disclosure also relates to a method (not claimed) for treating a jaw having at least one gap in the area of ​​the teeth and possibly also of the jawbone with the aid of a jaw implant of the type mentioned at the outset, which jaw implant is cut to length and / or separated into a partial area of ​​the at least one perforated bar adapted to the at least one gap, wherein the dental prosthesis is mounted on the partial area bridging the at least one gap in a subsequent method step.

[0018] Further developments of the invention will become apparent from the following description of preferred embodiments in conjunction with the claims and the drawings. The invention is described in more detail below using preferred embodiments.

[0019] It shows: Fig. 1 a factory-prefabricated jaw implant shown in a top view, which has an internal first perforated strip for attaching dentures and a second external perforated strip on each of the two longitudinal sides, wherein the first perforated strip is connected to the second perforated strips via deformable and / or cuttable connecting bars, Fig. 2 the jaw implant from Figure 1 in a side view, Fig. 3 the jaw implant from the Figures 1 and 2 in a bottom view, Fig. 4which is already in the Figures 1 to 3 shown jaw implant in a state cut to length and adapted to the shape of an individual jaw, Fig. 5 the jaw implant from Figures 1 to 3in a state adapted to the individual conditions of a jaw, whereby the jaw has a gap in the dental lamina and in the jawbone on one side, which can be bridged with the help of a correspondingly cut section of the jaw implant and supplemented with dentures not shown here, Fig. 6 the jaw implant from the Figures 1 to 3 in a perspective view, where individual short lines indicate how and where the factory-prefabricated jaw implant can be cut to length to adapt to a specific jaw, Fig. 7 a jaw implant made from the prefabricated jaw implant according to the Figures 1 to 3 cut-to-length section of the inner first perforated strip, Fig. 8, another jaw implant, which is also prefabricated in large quantities according to the Figures 1 to 3cut-to-length portion of the inner first perforated strip in a perspective view, Fig. 9 a prefabricated jaw implant according to the Figures 1 to 3 manufactured and already adapted to the jaw of a patient, which here bridges a gap in the jawbone, whereby the required dentures can be attached to the corresponding section of the inner first perforated bar, Fig. 10 the jaw implant from the Figures 1 to 3 , where dashed cutting lines and rounded arrows show how the perforated bars of this jaw implant can be adapted to the individual circumstances of a patient and how they can be shaped, Fig. 11a from the prefabricated jaw implant according to the Figures 1 to 3 cut-to-length section from the inner first perforated strip and one of the outer second perforated strips, Fig. 12 the section adapted to a gap in the jawbone from Figure 11in a perspective view from below, and Fig. 13 the section from the Figures 11 and 12 in a state fixed to the jaw.

[0020] The jaw implant 1 shown here has an internal first perforated bar 2 that is approximately U-shaped. The perforated bar 2 has spaced-apart attachment holes 3 that are intended for mounting the jaw implant 1 on the patient's jawbone and, in addition to or instead of, attaching a denture. Cross-sectional weakenings 4 are provided at the intervals between adjacent attachment holes 3. These weakenings facilitate deformation and shape adaptation of the internal first perforated bar 2 in accordance with the external bone structure and are also intended for cutting this perforated bar 2 to length. Since the perforated bar 2 can be cut to length at the cross-sectional weakenings 4 if necessary, the jaw implant 1 can be mass-produced or even industrially in large quantities and subsequently adapted to the individual circumstances in the area of ​​the jaw 5 to be treated, even during a single treatment appointment.While the fastening holes 3 provided at the free end regions 6, 7 of the approximately U-shaped inner perforated strip 2 can only be provided for fixing and screwing the jaw implant 1 to the jawbone, the inner first perforated strip 2 has, in a manner spaced from the free ends, . 6, 7 of this perforated strip 2 arranged partial area 8 in the area of ​​each fastening hole 3 having an internal thread for fastening a dental prosthesis, a cross-sectional thickening 9 increasing the longitudinal extent of this fastening hole 3.

[0021] As can be seen from a comparison of the Figures 1 to 3As can be seen, the inner first perforated strip 2 is connected on both sides via connecting webs 10 to an outer second perforated strip 11, 12. The first perforated strip 2 and the second perforated strips 11, 12 have a link-chain-shaped outer contour, each with a rounded shape in the area of ​​each fastening hole 3 and a waist-shaped indentation designed as a cross-sectional weakening 4 between adjacent fastening holes 3.

[0022] In the Figures 1 and 3 It can be seen that the cross-sectional thickenings 9 have a non-circular outer contour, so that a dental prosthesis screwed onto these cross-sectional thickenings 9 can be easily mounted thereon in a rotationally fixed manner.

[0023] From a comparison of the Figures 1 and 3, which show the upper and lower sides of the prefabricated jaw implant 1, it can be seen that the cross-sectional thickenings 9 are each designed as a double-sided material thickening of the inner first perforated strip 2, which material thickenings have a preferably circular segment-shaped outer contour with outer lines or chords arranged on opposite sides towards adjacent cross-sectional thickenings. From the side view in Figure 2 It can be seen that the jaw implant and its first and second perforated bars are designed without any socket, peg or sleeve, particularly in the area of ​​the cross-sectional thickenings 9. Furthermore, Figures 1 and 3 It is clear that the prefabricated jaw implant 1 is designed the same on the upper and lower sides and can therefore be placed and fixed on the jaw 5 with either the lower side or the upper side.

[0024] In Figure 2It is not shown that the first perforated strip 2 and / or the second perforated strips 11, 12 have a reduced cross-section in a central region of the longitudinal extension and can have a thickened or enlarged cross-section towards their free end regions. Due to such a dogbone-shaped cross-section, the inner first perforated strip 2 and / or the outer second perforated strip(s) 11, 12 only rest on the jaw 5 with the outer edge regions of this cross-sectional shape, whereby parts of the jaw 5 below the perforated strips 2, 11, 12 are subjected to less stress, while still having sufficient blood flow. Figures 1 and 3It is indicated that the fastening holes 3 provided at the free end regions 6, 7 of the first perforated strip 2 and intended for fastening the perforated strip 2 to the jaw 5 also have an internal thread. Furthermore, such an internal thread is also provided in each of the fastening holes 3 provided on one of the second perforated strips 11, 12.

[0025] As can be seen from the Figures 1 to 3 As can be seen, the second perforated strips 11, 12 are adapted to the shape of the U-shaped inner first perforated strip 2 and also have a rounded shape in their longitudinal extension. The jaw implant 1 is designed to be cut to length and deformable in the region of its connecting bars 10.

[0026] From a comprehensive view of the Figures 4 , 5 , 9 and 12It becomes clear that the jaw implant 1 is designed to be deformable in the area of ​​its connecting bars 10 in such a way that the inner first perforated bar 2 can be mounted on the jaw ridge, while the outer second perforated bar(s) 11, 12 can be fastened to the outer flanks of the jaw 5.

[0027] In Figure 4 It has been shown that the jaw implant 1, which is also prefabricated in large quantities, according to the Figures 1 to 3can be deformed in such a way that its first inner perforated strip 2 is fixed to the alveolar ridge of the jaw 5 to be treated, while the second perforated strips 11, 12, which are connected via the downwardly angled connecting webs 10, can be fastened to the outer flanks of the jaw 5. The required dental prosthesis can be screwed into the fastening holes 3 of the inner first perforated strip 2, which are reinforced by corresponding cross-sectional thickenings 9. At least some of the fastening holes 3 provided in the area of ​​such cross-sectional thickenings 9 can also be used to fasten the inner first perforated strip 2 to the ridge of the jaw 5, if corresponding fastening screws are screwed into the jawbone through these fastening holes 3.

[0028] In Figure 5 It is shown that the Figures 1 to 3The prefabricated jaw implant 1 shown can also be shortened along its longitudinal central axis in such a way that the half of the inner first perforated bar 2 can be attached to the corresponding half of the alveolar ridge of the jaw 5 to be treated, while the second perforated bar 11, which is connected to this half of the perforated bar via the connecting webs 10, is screwed tightly to the adjacent outer flank of the jaw 5. Here, too, the fastening holes 3 provided in the area of ​​the cross-sectional thickenings 9 can carry the required dentures.

[0029] In Figure 6 is indicated by short cutting lines 13, as shown in the Figures 1 to 3 prefabricated jaw implant 1 to the Figure 5 can be shortened and shaped to suit the individual conditions in the patient's jaw.

[0030] In the Figures 7 and 8 It is indicated that the inner first perforated strip 2 of the Figures 1 to 3 The prefabricated jaw implant 1 shown can also be separated in order to use a corresponding section of this internal first perforated strip 2 for mounting dental prostheses. At least some of the fastening holes 3 provided in the area of ​​the cross-sectional thickenings 9 can be penetrated by fastening screws (not shown in detail), which are anchored in the jawbone with their threaded shaft projecting beyond the corresponding section of the perforated strip 2.

[0031] In Figure 9 It has been shown that the Figures 7 and 8 Separated sections of the inner first perforated strip can also be used to permanently bridge a gap in the dental strip and, if necessary, in the underlying jawbone.

[0032] In Figure 10 It is illustrated by dashed cutting lines 13 that the prefabricated jaw implant 1 is positioned according to the Figures 1 and 3can be individually cut and shortened. Curved arrows indicate that the perforated strips 2, 11, 12 of the Figure 10 shown jaw implant can be bent and deformed, particularly at the cross-sectional weakenings 4, in such a way that the shape of this jaw implant can be easily adapted to the conditions in the jaw of a patient.

[0033] From a comprehensive view of the Figures 11 to 13 It becomes clear that a jaw implant made from the prefabricated jaw according to the Figures 1 to 3A cut-out section of the inner first perforated strip 2 and one of the outer second perforated strips can be cut to length and bent in such a way that this section of the jaw implant 1 bridges a gap in the jawbone and in the overlying dental lamina. The perforated strips 2, 11, 12 of the jaw implant shown here can therefore be easily separated from one another, so that only sections of the jaw implant can be implanted. The link-chain-shaped outer contour of the perforated strips 2, 11, 12 and the waist-shaped cross-sectional weakenings 4 provided between the fastening holes 3 form constrictions at which the perforated strips 2, 11, 12 can be severed, cut to length and / or deformed. Sections of the prefabricated jaw implant 1 can be used as a sufficiently stable retroplate in tooth-bearing areas. List of reference symbols

[0034] 1 Jaw implant 2 Internal first perforation bar 3 Fixing holes 4 Cross-sectional weakenings 5 ​​Jaw 6 Free end area of ​​the internal first perforation bar 2 7 Free end area of ​​the internal first perforation bar 2 8 (Middle) section 8 of the first perforation bar 2 arranged at a distance from the free ends 6, 7 9 Cross-sectional thickenings 10 Connecting bars 11 External second perforation bar 12 External second perforation bar 13 Cutting lines

Claims

1. Jaw implant (1) having a first, approximately U-shaped perforated strip (2) and at least one second perforated strip (11, 12) which, in relation to the U-shape of the first perforated strip (2), lies outside the U, wherein the first perforated strip (2) carries spaced-apart fastening holes (3) and has cross-sectional weakened portions (4) between adjacent fastening holes for cutting the first perforated strip (2) to length, wherein the first perforated strip (2) has a partial region (8) at a distance from the free ends (6, 7) of the first perforated strip (2), in which fastening holes (3) have an internal thread for fastening a tooth replacement and in which each of these fastening holes (3) with internal thread has a cross-sectional thickened portion (9) which increases the longitudinal extension of this fastening hole (3) and wherein the second perforated strip (11, 12) is connected at a leg of the U-shape of the first perforated strip via connecting webs (10) to the first perforated strip (2), wherein the fastening holes (3) of the second perforated strip (11, 12) are designed to accommodate fastening screws and wherein the first perforated strip is designed without a base, pin, or sleeve, wherein the jaw implant (1) is designed to be deformable in the region of its connecting webs (10) in such a way that the first, inner perforated strip (2) can be mounted on a jaw ridge, while the at least one second, outer perforated strip (11, 12) can be fastened to the adjacent outer flank of the jaw ridge.

2. Jaw implant according to claim 1, characterized in that the first and / or the at least one second perforated strip has a link chain-shaped outer contour with in each case a preferably rounded formation arranged in the region of each fastening hole (3) and a waist-shaped indentation formed as a cross-sectional weakened portion (4) between adjacent fastening holes (3).

3. Jaw implant according to one of the preceding claims, characterized in that the cross-sectional thickened portion (9) has a non-circular outer contour.

4. Jaw implant according to one of the preceding claims, characterized in that at least one cross-sectional thickened portion (9) is designed as a material thickening provided on one or both sides of the first perforated strip (2), which material thickened portion (9) has a preferably circular segment-shaped outer contour with outer lines or circle chords arranged on opposite sides toward adjacent cross-sectional thickened portions (9).

5. Jaw implant according to one of the preceding claims, characterized in that the first and / or the at least one second perforated strip has a reduced strip cross-section in a central region of its longitudinal extension and has a thickened or enlarged strip cross-section relative thereto in the direction toward its free end regions.

6. Jaw implant according to one of the preceding claims, characterized in that the fastening holes (3) provided at the free end regions (6, 7) of the first strip (2) and intended for fastening the first perforated strip (2) to the jaw (5) also have an internal thread.

7. Jaw implant according to one of the preceding claims, characterized in that the at least one second perforated strip (11, 12) is adapted to the shape of the U-shaped inner first perforated strip (2).

8. Jaw implant according to one of the preceding claims, characterized in that the jaw implant (1) is designed to be cut to length and / or deformable in the region of its connecting webs (10).

9. Jaw implant according to one of the preceding claims, characterized in that the jaw implant (1) has two second perforated strips (11, 12) which, in relation to the U-shape of the first perforated strip (2), are each located outside the U and are each connected to the first perforated strip (2) via connecting webs (10) at one of the legs of the U-shape of the first perforated strip (2).

10. Jaw implant according to one of the preceding claims, characterized in that the jaw implant (1) is made of metal or a preferably reinforced and in particular fiber-reinforced plastic.