EP2928410A1

EP2928410A1 - Implant for bone distraction

Info

Publication number: EP2928410A1
Application number: EP13799578.3A
Authority: EP
Inventors: Domonkos Horvath
Original assignee: Celgen AG
Current assignee: Celgen AG
Priority date: 2012-12-05
Filing date: 2013-12-05
Publication date: 2015-10-14
Also published as: US9700386B2; WO2014086910A1; US20150313689A1; DE102012024205A1; DE102012024205B4

Abstract

The present invention relates to an implant, preferably a tooth implant, comprising an implant body and a distraction membrane, the use of the implant for callus distraction and a method for implanting same.

Description

Implant for bone distraction

description

The present invention relates to an implant, preferably a dental implant comprising an implant body and a distraction membrane, the use of the implant for callus distraction and methods of implantation.

In order to be able to permanently and firmly fix implants in a jaw, the jawbone at the appropriate place must be both thick enough and strong enough. So there must be bones of sufficient quantity and quality.

If not enough bone is available for the secure anchoring of a sufficiently large or long implant, a so-called jawbone structure must be made. In particular, the recovery of bone height is considered problematic. For bone extraction different methods are used.

With little bone deficiency in width, the bone needed for jawbone augmentation can be gained during surgery. It is also possible to use bone substitute material for this purpose or to increase the amount of attachment by mixing bone and replacement material. This augmentation area is often protected with a flexible membrane, so that an undisturbed healing of the bone can take place. Other procedures include bone spreading, bone splitting, bone-block transplantation, sinus lift, cavity techniques, in part also using bone substitute materials and protective membranes and socket preservation.

From a biological point of view, the best substitute for a bone is an autologous cancellous graft. However, such grafts are available only limited and show a high absorption rate after transplantation.

The materials and techniques used in the prior art often provide insufficient bone quality, so that implants are not firmly anchored in their implant bearings. In addition, the bone substitute is often not sufficiently vascularized, which increases the risk of infection and the regeneration of the bone is impaired. Also, prior art methods often use growth factors that greatly increase the cost of the methods. Instead of using a bone substitute missing bone substance can also be partially filled by bone regeneration. Segmental interruptions of bony continuity on long bones can thus be treated by distraction osteogenesis. Callus distraction has been known for over a hundred years. The most important biological stimulus for bone formation is the mechanical stress. This releases piezoelectric forces that activate osteoblasts and osteoclasts. Dissection osteogenesis induces new bone formation by inducing biological growth stimuli through slow separation of bone segments. By this method, the direct formation of braid bones is achieved by distraction. The defi- ned tension in bone generation is essential. If such a defined tensile stress is applied to bone fragments, the mesenchymal tissue in the gap and at the adjacent fragment ends exhibits an osteogenic potential. If there is sufficient vascular potency, progressive distraction results in metaplasia of the organized hematoma, also called blood coagulum, in a zone of longitudinally-arranged, fibrous tissue that can transform directly into cortical bone under optimal external and internal conditions. However, what is difficult is that the bone tissue is subject to highly complex control during its regeneration.

WO 03/051220 A2 describes a method for distraction of a jaw bone by means of bone segments.

DE 10 2010 055 431 A1, WO 01/91663 A1 and US Pat. No. 5,980,252 describe devices and methods for callus traction by means of artificial interfaces, for example membranes. The membranes used there are flat plates or plates, which usually consist of a metal, such as titanium. The membranes are moved by various devices and actuator elements, such as screws or cables. These actuator elements are sometimes very complex or the lifting of the membrane can only be adjusted insufficiently. In addition, in order to move the membrane through the actuator element, it must often be anchored to adjacent teeth or in the bone. This leads to additional treatment or even surgical steps. US Pat. No. 6,537,070 B1 discloses a multipart implant which is intended to produce a distraction osteogenesis by unscrewing the individual parts. However, this is limited at most to the direct area of the implant thread. A typical bone defect that affects the entire width of a tooth gap is therefore not refillable. Also, in this implant for distraction, a part of the implant body in the bone tissue and / or in the region of the adjacent mucosa must be rotated, which is unfavorable for healing and bone formation. The technical problem underlying the present invention is to provide means and methods for dental implantation and bone disintegration which make it possible to carry out implantation procedures and bone regeneration procedures in the jaw region, which overcome the disadvantages of the prior art.

The technical problem underlying the present invention is the provision of means and methods that allow to perform a simplified dental implantation when the jawbone has to be built up. The technical problem underlying the present invention is also the provision of distraction devices which have a simple and safe construction.

The technical problem underlying the present invention can also be seen to provide devices and methods in which a bone structure necessary by a dental implant replacement by means of distraction osteogenesis can be done so that the individual distraction steps not by a Dentist must be performed in a practice, but can be performed independently by the patient or a non-trained helper.

The present invention solves the technical problem underlying it, in particular by providing implants, methods and uses according to the claims.

The present invention solves the underlying technical problem in particular by providing an implant, comprising an implant body and a distraction membrane, wherein the distraction membrane is connected via a connecting element to the implant body, wherein the connecting element is arranged movably over at least a portion of the longitudinal axis of the implant body and wherein via the movable arrangement of the connecting element, a displacement of the distraction membrane along the longitudinal axis of the implant body over at least a portion of the longitudinal axis is made possible.

In a preferred embodiment, the implant is a temporary implant. In a preferred embodiment, the implant is a tap.

In a preferred embodiment, the implant is a dental implant. All embodiments of the implant according to the invention described here therefore relate in particular also to a dental implant according to the invention. The present invention thus solves the technical problem on which it is based by providing a dental implant comprising an implant body and a distraction membrane, the distraction membrane being connected to the implant body via a connecting element, wherein the connecting element is movably arranged over at least a portion of the longitudinal axis of the implant body and wherein via the movable arrangement of the connecting element, a displacement of the distraction membrane along the longitudinal axis of the implant body over at least a portion of the longitudinal axis is made possible.

The connecting element is thus arranged such that it itself and thus also the membrane connected to the connecting element can be moved along at least a partial region of the longitudinal axis of the implant body. In a preferred embodiment, the dental implant is a temporary implant. In a preferred embodiment, the dental implant is a tap.

An implant with a construction according to the invention makes it possible, advantageously, for bone augmentation by distraction osteogenesis not to require additional, particularly complicated, surgical procedures than for the actual placement of the implant itself. The procedural steps involved in setting a conventional dental implant necessarily include the two operative ones Steps a) Make a threaded hole using a tap or temporary implant and then b) insert and wax the final implant. Before that, the optional steps of "setting a pilot hole in the bone" and "extending the pilot hole" can be performed. After healing the final implant, a crown is usually placed on the final implant. But this can also be the case with temporary implants. When using an implant according to the invention in step a), no further, in particular costly, operational steps are necessary, although with the implant according to the invention a bone distraction between the steps a) and b) can take place for the construction of the bone surrounding the implant. Moreover, the placement of the implant body of an implant according to the invention can advantageously take place in a conventional manner, so that the dentist does not have to learn a new technique. After setting the implant body can then be used without much effort, the membrane and connected by the connecting element with the implant body. As a result of the continuous or in particular stepwise movement of the connecting element along the implant body away from the bone with a typical distraction speed, the membrane is slowly pulled away from the jawbone, so that a distraction osteogenesis occurs between the actual steps a) and b) for a desired period of time. In this case, the gradual displacement of the connecting element by the patient or a non-trained helper can be done, as is also customary, for example, when adjusting a brace, since the connecting element au ßerhalb the mucous membrane is located and thus easy to reach. After the bone structure has been completed to the desired extent, the connector can be removed by the dentist without any operational effort from the implant body. Is the membrane of the implant according to the invention absorbable, so no further operative step to remove the membrane is necessary because it can remain between the mucosa and bone and is degraded there. When using a nonabsorbable membrane, only a small surgical step is needed to remove the membrane. Afterwards, step b) can then be carried out in the usual way, ie the implant body can be removed and the final implant set. Alternatively, the implant according to the invention may also be a permanent implant and the implant body remain in the bone and provided with a permanent crown, for example, in a dental implant.

The present invention thus provides an implant that allows conventional steps a) and b) to be carried out in the usual way, but in between without a major surgical effort to carry out bone distension to build up the bone, whereby the individual distraction steps are not necessarily performed by a dentist in one Dental practice must be performed.

The present teaching therefore covers, in particular, dental implants and methods for bone regeneration, wherein bones in the jaw area and / or in the periodontal area are to be regenerated.

The implant according to the invention also has the advantage that the implant body does not have to be rotated for disctraction but remains rigidly in the bone, so that ingrowth in the bone is improved and irritation of the mucous membrane is avoided by rotating the implant body.

An implant according to the invention thus comprises the three components implant body, connecting element and membrane. In the context of the present invention, a "membrane" is understood to mean a medical membrane which is used in medical procedures for the regeneration of a bone or in the introduction of bone substitute materials in a bone defect, whereby the term "bone regeneration" encompasses both new bone formation, for example by natural o In the context of the present invention, a membrane is understood to mean a plate-shaped, ie plane or planar, body in the non-curved state or adhesion of osteoblasts in the region of a bone defect, and a mating surface opposite the contact surface, These two surfaces may have any shape, for example round, oval, quadrangular or polygonal e contact surface and the opposite surface of the membrane in the non-curved state rectangular or round. In the non-curved state, the size of these two surfaces of a rectangular membrane results from the length and the width of the membrane. The membrane also has at least one side surface, in particular four side surfaces, if it is a rectangular membrane. In the undulating state, the size of two of the side surfaces of the height and the length of a rectangular membrane, the size of the other two side surfaces resulting from the height and the width of the membrane. According to the invention, the membrane is as thin as possible, that is to say the size of the side surfaces is many times smaller than the size of the contact surface and, in the case of a quadrilateral membrane is the height of the membrane is many times smaller than the length and the width of the membrane.

A membrane used according to the invention preferably serves for bone regeneration in the oral and maxillofacial region, ie in particular for bone regeneration in a jaw. The jaw can be an upper jaw or a lower jaw.

In a preferred embodiment, the membrane is a distraction membrane.

In the context of the present invention, a "distraction membrane" is understood to mean a medical membrane which can serve or serve as an artificial boundary surface in bone distraction.Such a membrane is preferably rigid and resistant to fracture, in particular dimensionally stable It can be attached to a distraction device and controlled by the distraction device at a desired rate, either continuously or individually, away from the bone, for example, pulled away or pushed away from the bone A distraction membrane is thus a specific subset of medical membranes can readily be differentiated from one skilled in the art by other medical membranes which, for example, serve to easily cover a bone defect.

In the context of the present invention, a "bone distraction" or a "callus distraction" is understood to mean a medical procedure for bone regeneration, in which an element is slowly removed from a bone defect, so that the cells located in a callus between the bone defect and the element, in particular osteoblasts, an artificial biomechanical pulse, in particular tensile pulse, is exerted. The element may be, for example, a bone, a bone fragment or an artificial body. In particular, the element may be a dispersion membrane.

In the context of the present invention, a "biomechanical pulse" is understood to mean a mechanical force transmission, in particular the transmission of a tensile force, to a cell, in particular osteoblasts, and the biological processes in the cell triggered thereby.

In a preferred embodiment, the membrane is made of a resorbable material. As a result, it is advantageously possible to dispense with removing the membrane after the bone has been built up. Rather, the membrane can remain between mucous membrane and bone, where it degrades into harmless substances and decomposed.

In a preferred embodiment, the membrane according to the invention is resorbable, in particular bioresorbable. In a preferred embodiment, the membrane is a bioresorbable distraction membrane.

The person skilled in the art is aware of various materials for resorbable, that is to say biodegradable, membranes and different resorbable membranes known from the prior art. Suitable resorbable materials are, for example, polylactite or polycaprolactone. Resorbable distraction membranes of the prior art can also be used for the implant according to the invention. However, an at least two-layer resorbable membrane described below is particularly preferably used. A particularly preferred membrane, in particular a distraction membrane, for bone formation, preferably as an artificial bone fragment for bone formation, has at least two layers and a contact surface and a mating surface, wherein the mating surface is formed by the first layer, wherein the first layer consists of collagen or predominantly collagen, and wherein the second layer is rigid.

Another particularly preferred membrane is a membrane for bone formation having a contact surface and a counter surface, wherein the membrane has at least two layers, wherein the counter surface is formed by the first layer, wherein the first layer consists of collagen or predominantly contains collagen, and wherein the second layer consists of a bioresorbable plastic or predominantly contains a bioresorbable plastic. In one embodiment, the membrane may be bilayered. The contact surface is then formed by the second layer. In a preferred embodiment, the membrane is at least three layers.

In a preferred embodiment, the membrane is three-layered. In a preferred embodiment, the membrane is three-layered, wherein the contact surface is formed by a third layer. In a preferred embodiment, the membrane is at least three layers, wherein the contact surface is formed by a third layer, wherein the third layer consists of a mineral material or predominantly contains a mineral material. In a preferred embodiment, the membrane is three-layered, wherein the contact surface is formed by a third layer, wherein the third layer consists of a mineral material or contains predominantly a mineral material. The membrane can therefore be two-layered or three-layered. The membrane may also have further layers, for example a fourth layer, a fifth layer or further layers.

The layer which forms the contact surface, that is to say in particular the second layer or the third layer, is preferably designed such that the contact surface permits a particularly good adhesion of cells, in particular osteoblasts. This is advantageous, in particular, in the case of a dissecting membrane, since this ensures that adhering cells of the callus are distracted particularly well by the movement of the membrane, that is to say they receive biomechanical impulses.

It has surprisingly been found that a multi-layered construction of a membrane, in particular a distraction membrane, allows it to be constructed in such a way that both the contact surface and the mating surface can interact particularly well with the respective tissues resting against the surfaces. The membrane according to the invention thus represents a surprisingly good substitute for autologous or allogenic bone blocks. The collagen of the first layer of a membrane according to the invention acts on the connective tissue present on the opposite surface. At the same time, this collagen layer can serve as protection of the rigid second layer. The second layer, which preferably consists of a bioresorbable plastic or contains predominantly a bioresorbable plastic, serves as a scaffold structure, so that the membrane can be rigid and not bendable and thus suitable for use as a distraction membrane. Due to the preferred use of resorbable plastics sufficient stability of the membrane is achieved, so that can be dispensed with the use of metals, such as titanium. Thus, despite sufficient stability, the entire membrane according to the invention is advantageously resorbable in the body so that the membrane or membrane parts do not have to remain in the body or have to be surgically removed again. In addition, the bioresorbable plastic is well suited as a contact surface for cells, especially osteoblasts of a callus or can be well coated with a third layer. In a preferred embodiment, this contact surface can therefore be formed in particular also by a third layer, which preferably consists of a mineral material or predominantly contains a mineral material. This layer then advantageously corresponds to a natural bone layer of an autogenous or allogenic bone.

The use of a bioresorbable plastic as a scaffold layer has the additional advantage that this scaffold layer may have a specific shape, for example, may be curved and / or may have a predetermined porosity, which promotes blood circulation and vascularization. The preferred use of a biodegradable plastic as a framework layer has the further advantage that this material can be easily cut or otherwise cut, so that the Membrane can be cut into the desired shape without much effort.

By virtue of the materials chosen, the artificial bone fragment according to the invention can advantageously be designed as a membrane despite the multi-layered nature, ie be very thin. This has the advantage over the prior art natural or artificial bone fragment blocks, which must have a certain thickness, that improved perfusion and vascularization are provided by the thin first layer and the thin second layer, and also by an optional thin third layer can take place.

Without wishing to be bound by theory, the state of the art assumes that an important factor for bone regeneration is a shielding of the bone defect from ingrowing connective tissue. Therefore, in the treatment of bone defects often shielding membranes are used, which shield the bone defect against the connective tissue and prevent ingrowth of the connective tissue in the bone defect forming callus. This shielding is often considered more important than the presence of biomechanical pulses that stimulate osteoblasts to form bone. Surprisingly, however, the provision of biomechanical pulses for bone formation appears to be far more important than the shielding of the bone defect from ingrowth of the surrounding connective tissue. Therefore, the membrane of the invention may preferably be perforated. It can thus have pores which extend from the mating surface through the membrane to the contact surface. Through these pores can both the bone defect and the callus located there, as well as the connective tissue separated by the membrane from the bone defect, are well supplied with nutrients and blood, and thus are particularly well vascularized. Since the membrane is thin in comparison to bone blocks, the pores are correspondingly short, so that a particularly good connection can be established between tissue lying on the mating surface and the callus present on the contact surface. The fact that connective tissue can also grow into the bone defect area surprisingly plays a subordinate role as long as the osteoblasts in the callus experience sufficient biomechanical impulses to be stimulated for bone formation.

The use of a membrane which is preferred according to the invention also leads in particular to a good vascularization of the newly forming bone tissue, in particular if the membrane according to the invention has preferred pores which extend through the membrane from the mating surface to the contact surface in an interconnecting manner.

In a preferred embodiment, a second layer of the membrane consists of a bioresorbable plastic or contains predominantly a bioresorbable plastic, wherein the second layer has pores with a diameter of at least 10 μιτι, wherein the pores of the interface between the second layer and the first layer for Contact surface through the second layer pass interconnect through. The counter surface of the membrane according to the invention is preferably formed by a first layer which consists of collagen or predominantly contains collagen. In a preferred embodiment Form contains the first layer of at least 50% by weight collagen. More preferably, the first layer contains at least 75% by weight collagen. Particularly preferably, the first layer contains at least 90% by weight, more preferably at least 95% by weight, of collagen. In particular, the first layer can also consist entirely of collagen. The collagen may be native collagen or denatured collagen. The collagen may be a collagen selected from the group consisting of one of collagen types I to XXVIII and mixtures thereof. Preferably, the collagen is Type I collagen since it is a fibrillar collagen present in many connective tissues.

A "first layer" is preferably understood as meaning the layer which forms the counter-surface, which consists of collagen or predominantly contains collagen.

The first layer, which consists of collagen or predominantly contains collagen, preferably has a layer thickness of at least 0.1 mm and at most 10.0 mm. The layer thickness of the first layer is preferably at least 01, mm. The layer thickness of the first layer is particularly preferably at least 0.2 mm. The layer thickness of the first layer is preferably at least 0.5 mm. The layer thickness of the first layer is preferably at least 1.0 mm. The layer thickness of the first layer is preferably at least 2.0 mm. The layer cover of the first layer is preferably at most 10.0 mm. The layer thickness of the first layer is preferably at most 5 mm. The layer thickness of the first layer is preferably at most 3 mm. The layer thickness of the first layer is preferably at most 2.5 mm. Preferably, the Layer thickness of the first layer at least 0.5 mm and at most 2.5 mm.

The "second layer" is preferably understood as meaning the layer of the membrane according to the invention which forms the backbone of the membrane according to the invention Preferably, the first layer and the second layer form an interface, ie are adjacent to one another Preferably, the second layer is rigid second layer may be plate-shaped or scaffold-shaped.

According to the invention, the second layer preferably consists of at least one bioresorbable plastic or predominantly contains at least one bioresorbable plastic. According to the invention, the second layer preferably consists of a bioresorbable plastic or predominantly contains a bioresorbable plastic. In a preferred embodiment, the second layer contains at least 75% by weight of a bioresorbable plastic. More preferably, the second layer contains at least 95% by weight of a bioabsorbable plastic. In a preferred embodiment, the second layer consists of a bioresorbable plastic. In the context of the present invention, a "resorbable plastic" or a "bioresorbable plastic" is understood as meaning a plastic which is biodegraded and decomposed in the human body, for example a patient. The second layer may contain a single bioresorbable plastic or two or more different bioresorbable plastics. Preferably, the second layer of a membrane according to the invention consists of a single bioresorbable synthetic Material. The person skilled in various bioresorbable plastics are known. In this case, the skilled person can readily select suitable bioresorbable plastics, from which can produce membrane layers that are suitable as a stable and especially rigid framework. Suitable bioresorbable plastics are, for example, polylactic acids such as polylactide (PLA) and polycaprolactone (PCL).

In a preferred embodiment, the bioresorbable plastic is a polycaprolactone. In a preferred embodiment, the bioresorbable plastic is a polylactide.

In a preferred embodiment, the second layer is designed as a rigid framework and porous. In a preferred embodiment, the second layer is porous.

In a preferred embodiment, the second layer has a layer thickness of at least 0.01 mm to at most 4 cm. In a preferred embodiment, the second layer has a layer thickness of at least 0.1 mm to at most 1 cm. In a preferred embodiment, the second layer has a layer thickness of at least 0.1 mm to at most 3.0 mm. The second layer preferably has a layer thickness of at least 0.01 mm. Preferably, the second layer has a layer thickness of at least 0.05 mm. The second layer preferably has a layer thickness of at least 0.1 mm. The second layer preferably has a layer thickness of at least 0.2 mm. The second layer preferably has a layer thickness of at least 0.5 mm. The second layer preferably has a layer thickness of at least 1 mm. Preferably, the second layer has a layer thickness of at most 4 cm. Preferably, the second layer a layer thickness of at most 2.5 cm. Preferably, the second layer has a layer thickness of at most 1 cm. The second layer preferably has a layer thickness of at most 0.5 cm. Preferably, the second layer has a layer thickness of at most 3 mm. The second layer preferably has a layer thickness of at most 2.5 mm. Preferably, the second layer has a layer thickness of at most 2 mm.

Preferably, the second layer is rigid, so that it allows the use of the membrane as a distraction membrane or the transmission of biomechanical pulses as a framework.

In the context of the present invention, "rigid" is understood to mean that the layer or the membrane is so resistant to fracture, preferably also dimensionally stable, that it does not react with the forces normally occurring, that is to say with forces such as occur in a use according to the invention In particular, the term "rigid" is understood to mean that the membrane does not break due to tensile and compressive forces of the same magnitude as in the case of a callus distraction, and preferably does not bend, that is, has sufficient tensile strength. In a preferred embodiment, the membrane is porous. In a preferred embodiment, the membrane has pores, in particular interconnecting pores.

In a preferred embodiment, the second layer is porous.

In a preferred embodiment, the membrane has at least one perforation. In a preferred embodiment, the membrane is perforated. In a preferred embodiment the membrane has a multiplicity of holes, in particular pores, which extend through all the layers, in other words interconnecting pores. Such holes advantageously allow the penetration of blood at the contact surface and / or the mating surface of the membrane, whereby the blood can then be guided by capillary forces through the membrane to the respective other surface, so that a good circulation of the callus tissue and / or or the connective tissue adjacent to the membrane is achieved. In addition, vessels can form in the pores and thus through the membrane, so that a good vascularization of the growing bone can take place. The inventively preferred pores, in particular interconnecting pores, for example with a diameter of about 1 mm, thus allow the passage of capillaries through the membrane, so that in the area of the newly formed bone a very good blood circulation and immune defense is guaranteed. The perforations allow a good circulation of the membrane covering mucosa and the regenerate between the membrane and the bone. In a preferred embodiment, the second layer has pores, in particular interconnecting pores.

The interconnecting pores must have a minimum size, ie a minimum diameter, which allows erythrocytes with a typical diameter of about 7.5 μm to pass through the pores, ie a diameter of very fine blood vessels. In a preferred embodiment, the pores have a size, that is a diameter, of at least 0.005 mm and at most 1.5 mm. In a preferred embodiment, the pores have a size of at least 0.01 mm and at most 1.5 mm. In a preferred embodiment, the pores have a size of at least 0.005 mm. In a preferred embodiment, the pores have a size of at least 0.01 mm. Preferably, the pores have a diameter of at least 0.1 mm. Preferably, the pores have a diameter of at least 0.3 mm. Preferably, the pores have a diameter of at least 0.5 mm. Preferably, the pores have a diameter of about 1 mm. Preferably, the pores have a diameter of at most 1, 5 mm. Preferably, the pores have a diameter of at most 1, 3 mm. Preferably, the pores have a diameter of at most 1, 2 mm.

Preferably, the pores extend through the membrane. The pores preferably extend from the mating surface through the membrane to the contact surface. The pores are therefore preferably interconnecting, that is, they extend from the mating surface to the contact surface. The number of pores preferably depends on the size of the membrane. For example, a membrane having a length of about 20 mm and a width of about 10 mm may have about ten to twenty pores. Such a ratio of the number of pores to the membrane surface gives an optimum between the total pore surface, which promotes the blood circulation, and the adhesion surface for osteoblasts, which adhere to the membrane during the distraction process.

The contact surface may be formed in a preferred multilayer by the second layer or another, for example, a third layer. In this case, the contact surface is preferably designed so that it allows adhesion of cells, in particular osteoblasts. Preferably, the contact surface is rough. Preferably, the contact surface is porous. In this case, the contact surface next to the preferred interconnecting pores have other pores that are not interconnecting and extend only into the membrane, so that cells, especially osteoblasts, can attach very well. A particularly good contact surface can be formed by a further, in particular third, layer, preferably by a third layer of a mineral material.

The contact surface of the membrane according to the invention is preferably formed by the second layer or by a third layer. Preferably, the contact surface of the membrane is formed by a third layer which consists of a mineral material or predominantly contains a mineral material. The skilled person variously suitable mineral materials are known. Preferably, the mineral material of the third layer is hydroxylapatite and / or tricalcium phosphate. The third layer is preferably formed from hydroxyapatite or contains hydroxylapatite, in particular contains predominantly hydroxylapatite. In an alternative embodiment, the third layer is formed from tricalcium phosphate or contains tricalcium phosphate, in particular contains predominantly tricalcium phosphate. Alternatively, the mineral material of the third layer may include hydroxyapatite and tricalcium phosphate. Preferably, the third layer is porous. Preferably, the interconnecting pores extend through the third layer. The membrane according to the invention therefore preferably has a porous mineral third layer which forms the contact surface of the membrane. In a preferred embodiment, the third layer has a layer thickness of at least 1, 0 μιτι to at most 1 mm. Preferably, the layer has a layer thickness of at least 1, 0 μηι. Preferably, the third layer has a layer thickness of at least 2.0 μηη. Preferably, the third layer has a layer thickness of at least 5.0 μιτι. Preferably, the third layer has a layer thickness of at least 10 μηι. Preferably, the third layer has a layer thickness of at most 1 mm. Preferably, the third layer has a layer thickness of at most 0.5 mm. Preferably, the third layer has a layer thickness of at most 0.2 mm.

Preferably, the membrane has a thickness of at least 0.1 mm.

The preferred membrane thicknesses result in particular from the addition of the preferred thicknesses of the individual layers. Preferably, the membrane has a thickness of at least 0.2 mm to at most 13 mm. Preferably, the membrane has a thickness of at least 0.2 mm. Preferably, the membrane has a thickness of at least 0.5 mm. Preferably, the membrane has a thickness of at most 13 mm. Preferably, the membrane has a thickness of at most 10 mm. Preferably, the membrane has a thickness of at most 5 mm. Preferably, the membrane has a thickness of at most 3 mm.

In a preferred embodiment, the membrane has a hole for attaching the connecting element. In a preferred embodiment, the membrane has a hole, which is particularly preferably present in the central surface area of the membrane, through which a connecting element can be inserted, or into which a connecting element can be screwed, inserted, glued or clicked. In a preferred embodiment, the hole has a thread. The thread may in particular be formed by the hole wall present in the second layer. It is thus preferable for the membranes to be ran having a hole, wherein the hole extends through the second layer in particular by the bioresorbable plastic of the second layer and the hole in the region of the second layer has a thread. In this thread, the connecting element can be screwed in an advantageous manner.

In an alternative embodiment, the hole has no thread, for example, if in the hole, a connecting element is inserted, glued or clicked.

In a preferred embodiment, the connecting element is located on the mating surface of the membrane or extends into the membrane as viewed from the mating surface. In a preferred embodiment, the edges of the membrane are rounded.

The membrane may be flat or curved. In particular, in the case of membranes with a smaller expansion, the membrane can preferably be flat, ie flat.

But especially when used in the jaw area, the membrane can also be arched alternatively. In a preferred embodiment, the membrane is curved. In an alternative embodiment, the membrane, especially if it is a membrane for use in the jaw region, curved in a U-shape. A U-shaped arched membrane can completely cover a bone defect, especially in the jaw area, ie cover it from above and from both sides. In cross-section like the letter "U" it includes more vestibular and lingual the jawbone. Thus, the area is also extended to the side walls of the jaw, where also artificial impulses are given by it. This can then serve the comb broadening, since the clinical task of a Chamber elevation combined with comb broadening very often occurs.

In a preferred embodiment, at least a portion of the contact surface and the counter surface is curved. The membrane is therefore preferably curved over at least a portion of the length or the width of the membrane.

In a preferred embodiment, the edges between the contact surface and the at least one side surface and / or the counter surface and the at least one side surfaces are rounded. In an alternative embodiment of the invention can be provided that the edges formed by two side surfaces are rounded.

In a preferred embodiment, the membrane has rounded edges. In an alternative embodiment, the membrane according to the invention is a membrane for periodontal regeneration by means of distraction. Periodontal regeneration is understood to mean regeneration of the periodontium, ie not only of the bone but also of the periodontal ligament, the periodontal tissue, the gingiva and the papillae, for example by guided tissue regeneration (GTR) In a preferred embodiment, the periodontal regeneration membrane is very thin In a preferred embodiment, the periodontal regeneration membrane is shaped to have at least one lobe or periodontal regeneration a segment that can be inserted into a tooth space.

Alternatively, however, the membrane may also be non-absorbable, that is, consist of or contain nonabsorbable materials. The person skilled in the art is familiar with various nonabsorbable membranes, in particular distraction membranes from the prior art. These can also be used in an implant according to the invention.

In a preferred embodiment, the membrane is made of a biogenic material.

A preferred embodiment contains a nonabsorbable membrane. In a preferred embodiment, the membrane is made of titanium.

The membrane can also consist of ceramics, polymers, composites or collagen or contain these materials.

In a preferred embodiment, the membrane is sandblasted. In a preferred embodiment, the contact surface of the membrane is sandblasted.

In a preferred embodiment, the contact surface of the membrane is coated.

A person skilled in the art will be able to determine a suitable size of the membrane without further ado. The minimum size of a preferred membrane with hole for passing the implant body results from the diameter of the implant body and the resulting Diameter of the hole. Preferably, the membrane has a diameter of at least 3 mm, more preferably at least 4 mm, particularly preferably at least 5 mm, for example about 6 to 8 mm, in particular 7.15 mm. The diameter refers to round membranes. In the case of angular membranes, in particular rectangular membranes, the minimum diameter values mentioned refer to the minimum length and minimum width of the membrane.

The size of the membrane can be adapted to the size of the bone surface on which bone formation is to take place.

Since the membranes are dimensionally stable, larger membranes in the cm range can also be used, for example membranes with a diameter or length and width of about 1 cm, about 2 cm, about 5 cm or larger. In a preferred embodiment, the membrane is multi-layered, in particular three-layered. In an alternative embodiment, the first layer of the membrane which forms the counter surface consists of collagen, for example with a layer thickness of 1 mm to 3 mm, in particular of about 2 mm. The middle layer preferably consists of a metal, in particular titanium. Preferably, the third layer forming the contact surface is hydroxyapatite. Thus, a three-layered membrane with a collagen layer, a titanium layer and a hydroxyapatite layer is preferred.

In one embodiment, the membrane is curved so that it has the shape of a portion of a spherical shell, for example, a hemispherical shell. In a further embodiment, the membrane is arched in such a way that it has the shape of a cylindrical shell. In a preferred embodiment, the curvature has a radius which corresponds to the radius of a bone to be treated, for example a long bone or a skull bone. In a preferred embodiment, the curvature has a radius which corresponds to the radius of a jawbone crest to be treated.

In a preferred embodiment, the curvature has a radius of at least 5 mm. In a preferred embodiment, the curvature has a radius of at most 1 5 mm. In a preferred embodiment, the curvature has a radius of at least 5 mm and at most 15 mm.

The membrane of the invention may be intended for repeated or single use. Preferably, the membrane is intended for single use, as this is common practice in medical membranes and the adhesiveness of the surface of the membrane decreases due to contact with body fluid. The membrane according to the invention may in particular be intended for single use if it has been manufactured individually for a specific bone defect and / or if it has biodegradable constituents which decompose when the membrane is used.

The membranes can be made up in shape and size or individually adapted to the bone defect to be treated. In a preferred embodiment, the distraction membrane has a hole through which the implant body passes. In a preferred embodiment, the connecting element comprises a gear, in particular a self-locking gear, for moving the membrane along the longitudinal axis of the implant body. The connecting element is used to attach the membrane to the implant body and the controlled displacement of the membrane along the implant body.

In a preferred embodiment, the connecting element is attached to the opposite surface of the membrane or plugged into a hole in the membrane or preferably screwed.

Preferably, the connecting element connects the membrane and the implant body in such a way that the contact surface of the membrane is directed towards the tip of the implant body and that the connecting element is directed towards the head of the implant body.

Various embodiments of a suitable connecting element are known to the person skilled in the art, which permit the connection of the membrane with the implant body according to the invention and permit a movement, in particular controlled movement of the membrane along the implant body.

Preferably, the connecting element has a point of application for a tool, so that the connecting element can be moved or moved in a controlled manner along the implant body with the aid of the tool. Preferably, the point of attack for the tool on the actuating body of the connecting element. In a preferred embodiment, the hole in the distraction membrane has an internal thread and the connecting element has an external thread, wherein the external thread of the connecting element can be screwed into the internal thread of the distraction membrane.

In an alternative embodiment it can be provided that the hole of the membrane before screwing the connecting element has no thread, but this is milled when screwing the connecting element through its external thread.

In an alternative embodiment, it may be provided that the hole of the membrane has no thread and the connecting element is inserted, snapped, glued or clicked into the hole of the membrane, for example.

In a preferred embodiment, the connecting element is connected to the membrane via a tongue and groove connection or via an adhesive connection, via a plug connection or via a latching connection or via a click connection. In a preferred embodiment, the connecting element has a spacer sleeve.

In a preferred embodiment, the connecting element is designed as a spacer sleeve. Preferably, the spacer sleeve at least partially has a conical shape.

In an alternative embodiment, the connecting element has a spacer sleeve and at least one further subelement. Preferably, the at least one further subelement serves for the displaceable connection of the connecting element to the implant body.

In the prior art, a spacer sleeve is a metallic body used in implants. A spacer sleeve should bridge the gap between the bone and the mucous membrane. The spacer sleeve is usually used during the healing phase of an implant.

A spacer sleeve can advantageously be present in an implant according to the invention as part of the connecting element. Preferably, the spacer sleeve forms at least the part of the connecting element which is connected directly to the membrane. In this embodiment, the spacer sleeve can fulfill two tasks in an advantageous manner. On the one hand, the spacer sleeve as an intermediate element between the membrane and the sub-element of the connecting element, which is mounted on the implant body, allow a secure and simple connection, on the other hand, the spacer sleeve is in this embodiment at a position in which they especially in a use in Jaw area passes through the oral mucosa and thus they form the boundary between the see below the mucous membrane and lying on the mucous membrane further sub-elements of the connecting element. This can be achieved through the membrane and the dis- a smooth, non-sharp-edged surface are produced, with which the mucous membrane comes into contact, so that the mucous membrane during distraction not on the implant body, especially on sharp-edged parts of the implant body, such as the threaded part or the optional rack part, rubbing.

Thus, it is preferably provided that the membrane has a hole through which the implant body passes, the implant body also extends through the spacer sleeve and the spacer sleeve is inserted into the hole of the membrane or is preferably screwed into it.

In a preferred embodiment, the connecting element is designed as a spacer sleeve and, wherein the membrane is attached to a surface of the spacer sleeve. Preferably, the membrane with the mating surface is glued to the surface of the spacer sleeve, for example with a fibrin glue.

In an alternative embodiment, the membrane is formed from a surface of the spacer sleeve.

The spacer sleeve is designed such that it has an area which is directed in the direction of the tip of the implant body and on this surface either a membrane is applied o- this surface is membrane-like, in particular coated, for example coated with hydroxyapatite.

In this case, the spacer sleeve preferably has a conical shape. The cone of the spacer sleeve preferably enlarges in the direction of the tip of the implant body. Thus, the surface of the spacer sleeve, to which either the membrane is applied or the membranar- Tig is formed, formed by the base of the frustoconical cone. Preferably, the size of this base area corresponds to the size of the membrane surface. Since the size of the base of the cone is determined in particular by the angle between a generating line and the cone axis, thus, the membrane surface size can be determined advantageously by a spacer sleeve with a corresponding angle, without changing the height of the spacer sleeve. Thus, different spacer sleeves, which have a same height, but a different base area, can be used in an implant according to the invention and thus easily different membrane sizes. In an alternative embodiment, the cone of the spacer sleeve can be reduced in the direction of the tip of the implant body or the spacer sleeve has no cone, for example if only a small membrane surface is required.

In a preferred embodiment, such a spacer sleeve consists of a bioresorbable material.

In a preferred embodiment, the membrane is connected via a conical interference fit with a spacer sleeve, in which the cone increases in the direction of the tip of the implant body.

In one possible embodiment, the spacer sleeve is designed such that it is screwed onto the implant body as a connecting element and can be moved by turning along the implant body. In this case, the membrane is preferably rotatably mounted on the spacer sleeve, so that although the spacer sleeve rotates during the distraction, but not the membrane. In a further alternative embodiment of an implant according to the invention with spacer sleeve, the spacer sleeve is connected to the membrane via a tongue and groove connection or via an adhesive connection, via a plug connection or via a latching connection or via a click connection.

The preferred implant according to the invention with spacer sleeve can moreover advantageously be designed such that neither the implant body nor the spacer sleeve have to be rotated for disctraction, so that irritation of the mucous membrane by rotating the implant body and / or the spacer sleeve is avoided.

For simple and secure connection of the membrane to the connecting element via a screw connection of a spacer sleeve to the membrane, two alternative embodiments may preferably be provided.

In the first embodiment, the first end of the spacer sleeve, which is bolted to the membrane, has an external thread. The second end of the spacer sleeve, which is screwed to the at least one further sub-element of the connecting element, has a second thread, which is opposite to the first thread. The second thread may be an internal thread or an external thread. The at least one further subelement of the connecting element, which is screwed to the spacer sleeve, has a matching male thread or internal thread. To connect the membrane with the connecting element, it is sufficient in this embodiment to rotate the spacer sleeve, so that the first thread of the spacer sleeve in the hole the diaphragm rotates and at the same time connects the second thread of the spacer sleeve with the corresponding thread of the at least one further sub-element of the connecting element. Thus, by a single rotation, the spacer sleeve can be connected both to the membrane and to the at least one further part of the connecting element.

In the second alternative embodiment, the first thread of the spacer sleeve and the second thread of the spacer sleeve are the same. In this case, the threaded connection between the spacer sleeve and the at least one further element of the connecting element is then designed such that the spacer sleeve can be turned beyond the end position point into the thread or onto the thread of the at least one further subelement of the connecting element. In this embodiment, the spacer sleeve is then turned onto the thread or into the thread of the at least one further subelement of the connecting element beyond the end point. Then, the first thread of the spacer sleeve is brought into contact with the hole of the membrane. If now the spacer sleeve is rotated back to the end point with respect to the at least one further subelement of the connecting element, the first thread of the spacer sleeve simultaneously rotates into the hole of the membrane, so that upon reaching the end point, the spacer sleeve with both the membrane and the at least one further sub-element of the connecting element is connected.

Of course, the person skilled in the art also knows many other constructive embodiments which allow the connection of the connecting element to the membrane via a spacer sleeve. In a preferred embodiment, the connecting element has a housing.

In a preferred embodiment, the housing is designed as a spacer sleeve. In an alternative embodiment, the housing of the connecting element is connected to the spacer sleeve.

In a preferred embodiment, the connecting element has a spacer sleeve and a housing, wherein the housing has an external thread or an internal thread at one end and wherein the spacer sleeve at least partially has a conical shape and wherein the spacer sleeve at the first end with the smaller diameter an external thread to Having screwed into the hole of the diaphragm and wherein the spacer sleeve at the second, the first opposite end has an internal thread into which the external thread of the housing can be screwed, or wherein the spacer sleeve at the second, the first opposite end has an external thread into which Internal thread of the housing can be screwed.

The spacer sleeve can be screwed into the membrane self-tappingly. Alternatively, the spacer sleeve is screwed with an external thread in a befindliches in the membrane matching internal thread.

The spacer sleeve can form the lower part of the connecting element or even cover or partially cover the other parts of the connecting element. In a preferred embodiment, the implant body has along its longitudinal axis a first lower portion with a thread and a second portion above the lower portion. Preferably, the connecting element can be displaced or controlled in a controlled manner along the second subarea above the lower subarea. Preferably, the second portion is formed as a rack.

In a preferred embodiment, the connecting element has a housing with a passage and a threaded body, whereby the part of the implant body designed as a toothed rack is inserted through the passage at least substantially without clearance through the passage, and the threaded body is rotatably mounted in the housing in such a way is that the threaded body and the rack are in operative engagement. In a preferred embodiment, the implant is based on the system of a connecting element with an adjusting nut with internal thread, which is rotatably mounted in the housing and is screwed onto the implant body. By turning this adjusting nut, it moves, and with it, the housing and thus the connecting element with membrane along the implant body. Preferred is also an embodiment in which the connecting element is designed as a spacer sleeve, wherein the membrane is attached to a surface of the spacer sleeve. Or the membrane is formed from a surface of the spacer sleeve, as described above.

In an alternative embodiment, the implant is based on the system of a connecting element with a worm gear, an implant body with a rack portion and a diaphragm, wherein the rotational movement of a threaded body, in particular a screw, is translated into a translational movement of the connecting element and thus the diaphragm on the rack. Preferably, the threaded body, in particular the screw, a thread with a pitch p = 0.1 to 0.5 mm, in particular about 0.3 mm, in particular 0.3 mm and the rack is toothed accordingly. By a pitch of 0.3 mm of the threaded body results, for example, per complete revolution of the threaded body, a stroke of 0.3 mm.

Another alternative embodiment is an implant whose implant body in the apical third, in particular as a tap, has a wood screw thread and the remainder is provided with a further thread. At the other thread, the spacer sleeve is moved like a nut.

Although the spacer sleeve rotates in this embodiment, whereby the growing tissue is irritated, but a simpler construction is provided which can consist of only one part in an advantageous manner. In a preferred embodiment, the connecting element and the spacer sleeve of at least one biogenic material. Preferably, the material is not biodegradable.

In a preferred embodiment, the connecting element and the spacer sleeve made of titanium or a titanium alloy, in particular the material TIAI4V, zirconium or a stainless steel or this contained, in particular predominantly contain. In an alternative embodiment, the connecting element and the spacer sleeve can also consist of a biodegradable material, in particular of a biodegradable plastic such as polylactide or polycaprolactone or contain this, in particular predominantly contain.

The implant body preferably consists of a biogenic and non-biodegradable material.

The implant body preferably consists of a metal, in particular titanium or of zirconium, in particular if the implant according to the invention is a dental implant. The person skilled in the art is familiar with suitable materials for a dental implant body.

Alternatively, the implant body can consist of a biogenic and biodegradable material, for example if the implant according to the invention is not a dental implant.

A person skilled in suitable implant body forms are known. In particular, the lower part of the implant body, which has a thread for screwing into a bone, can be based on a threaded part of a prior art implant. For example, the implant body in the apical third, in particular as a tap, have a wood screw thread.

In a preferred embodiment, the implant comprises a crown. In a preferred embodiment, the dental implant comprises a crown. The technical problem underlying the present invention can also be seen in the provision of means and methods for bone dissection, which make it possible to perform bone regeneration procedures outside the jaw area, which overcome the disadvantages of the prior art.

The technical problem underlying the present invention can also be the provision of distraction devices which have a simple and safe construction.

An implant according to the invention can advantageously also be used generally for bone formation by distraction, since it can also be used in an application outside the jaw or in the jaw, without the implant also being intended to function as a tooth replacement. Even with such use, the implant is characterized by a simple structure and good handling.

In an alternative embodiment, the implant is not a dental implant.

In an alternative embodiment, the implant body, and particularly preferably the entire implant according to the invention, can be absorbable, ie consist of resorbable materials. This is particularly advantageous when the implant is not a dental implant, but is used only for bone formation by distraction, which use can be done not only in the jaw, but also in other bones. A resorbable implant according to the invention then has the advantage that the implant is no longer surgically removed after the distraction has taken place must be, but can remain in the body and is degraded there.

In an alternative embodiment, the implant body consists of a resorbable material. In a preferred embodiment, the entire implant then consists of resorbable materials.

In a preferred embodiment, the implant of the invention is for use in bone distraction.

In a preferred embodiment, the dental implant according to the invention serves for use in a bone distraction and at the same time as a provisional implant or permanent implant.

The implant according to the invention can also be designed as a permanent implant and in particular a permanent dental implant. In this case, after the bone distraction has taken place, the connecting element can be removed and replaced by a crown.

The present invention also relates to an implant according to the invention for use for callus distraction, in particular for the construction of a bone, in particular jaw bone, by distraction. In a preferred embodiment, the implant is suitable for callus distraction. In a preferred embodiment, the implant is suitable for bone regeneration.

In a preferred embodiment, the dental implant is suitable for callus distraction in the jaw region. In a preferred embodiment The dental implant is suitable for bone regeneration in the jaw area. In a preferred embodiment, the dental implant is suitable for periodontal regeneration in the jaw area. In a preferred embodiment, the implant is intended for use in a medical procedure, in particular in a surgical procedure.

In a preferred embodiment, the implant is intended for use in bone regeneration by distraction, especially in the jaw region.

In a preferred embodiment, the implant according to the invention is suitable for use for bone distraction, in particular of a jawbone. In a preferred embodiment, the implant according to the invention is used for bone distraction, in particular of a jawbone.

Distraction is preferably carried out with the implant according to the invention at a distraction rate of at least 0.2 mm per day to at most 2.5 mm per day, in particular from at least 0.5 mm per day to at most 2 mm per day. The distraction rate is particularly preferably about 1 mm per day.

The present invention also relates to an implant according to the invention for use for callus distraction, in particular for the construction of a jaw bone by distraction. The present invention also relates to an implant according to the invention for use for periodontal regeneration by distraction.

In an alternative embodiment, the implant according to the invention is a dental implant with a membrane for periodontal regeneration. Periodontal regeneration is understood to mean a regeneration of the periodontium, ie not only of the bone but also of the periodontal ligament, the periodontal skin, the gingiva and the papillae, for example by guided tissue regeneration (GTR). The present invention also relates to a kit comprising the implant base body of an implant according to the invention, at least one connecting element and at least one membrane, in particular a plurality of different membranes Preferably, the kit contains instructions for use The instructions for use preferably contain information such as the kit for the placement of the implant and the performance of a callus distraction can be used.

A preferred embodiment is a kit according to the invention for use in medical procedures, in particular surgical procedures, preferably in bone distraction, especially in the jaw area. A further preferred embodiment is the use of a kit according to the invention for producing an implant according to the invention. The present invention also relates to the use of an implant according to the invention in a medical procedure, in particular in a surgical procedure.

The present invention also relates to the use of an inventive implant for callus distraction, in particular in the jaw region, in particular for the construction of a jaw bone by distraction.

The present invention also relates to methods for callus distraction, in particular for the construction of a jaw bone by distraction, wherein a membrane of an implant according to the invention is applied to a bone defect to be regenerated and tension is exerted on this membrane via the connecting element. The membrane is thus removed at a certain speed with the rack from the bone defect. The speed is preferably 0.2 mm to 2.5 mm per day, in particular 0.5 mm to 2 mm per day. Most preferably, the speed is about 1 mm per day. Without being bound by theory, such a distraction process at the beginning of the process, in particular a distance of about 1, 5 mm between the membrane and bone advantageous.

The slow removal of the membrane from the bone defect can be continuous or discontinuous, for example daily or half-daily.

The present invention also relates to methods for callus distraction, in particular for the construction of a jaw bone by distraction, comprising the following steps: a) implanting the implant according to the invention in a bone, preferably a jawbone, wherein the implant is a provisional implant; b) carrying out a distraction osteogenesis with the membrane of the implant according to the invention; in particular as described above; c) removing the fastener from the implant body; d) removing the temporary implant body from the bone;

In the case of a distraction in the area of the jaw, step e) is preferably followed by insertion and ingrowth of your permanent implant into the drilled hole of the removed implant according to the invention.

The present invention also relates to methods for imputation of a permanent dental implant according to the invention, comprising the following steps: a) implanting the implant according to the invention into a bone, preferably a jawbone, wherein the implant is a permanent implant; b) carrying out a distraction osteogenesis with the membrane of the implant according to the invention; in particular as described above; c) removing the fastener from the implant body;

Preferably, a crown is placed on a dental implant in the method according to the invention. Preferably, in the method according to the invention, a bioabsorbable membrane is used which does not have to be removed. Alternatively, a non-biodegradable membrane, for example of titanium, may be used. This is preferably also removed after removal of the fastener from the implant body.

Preferably, step a) of the methods according to the invention comprises the following substeps: a1) implanting the implant body in the bone; a2) attaching the membrane to the implant body and applying the membrane to the bone defect; a3) attaching the connecting element to the implant body; and a4) attaching the connecting element to the membrane, for example by screwing, pinning, locking, clipping or gluing the connecting element, in particular the spacer sleeve of the connecting element, to the hole of the membrane.

Alternatively, the following sub-steps may be provided: a1) applying the membrane to the bone defect; a2) inserting the implant body into the hole of the membrane and implanting the implant body in the bone; a3) attaching the connecting element to the implant body; and a4) attaching the connecting element to the membrane, for example by screwing, pinning, locking, clipping or gluing the connecting element, in particular the spacer sleeve of the connecting element, to the hole of the membrane. Prior to step a), the optional steps of "setting a pilot hole in the bone" and "extending the pilot hole" may be performed. After healing the final implant, a crown is usually placed on the final implant. But this can also be the case with temporary implants. Advantageously, step b), in particular the stepwise displacement of the connecting element by the patient or a non-trained helper, for example by means of a tool attached to a point of application for the tool on the connecting element, preferably on the adjusting body of the connecting element can be.

Preferred embodiments of the invention will become apparent from the dependent claims.

The invention will be explained in more detail below with reference to FIGS. FIG. 1 shows the cross section of a preferred embodiment of an implant according to the invention;

Figure 2 is a side view and a plan view of the embodiment of Figure 1 according to the invention; 3 shows the embodiment of Figure 1 with connected and not yet connected membrane.

Figure 4 shows an alternative embodiment of the implant according to the invention in side view and cross section;

FIG. 5 shows a further alternative embodiment of the implant according to the invention in the assembled state and in individual parts;

FIG. 6 shows the alternative embodiment of the implant according to the invention of FIG. 5 during distraction in the area of the jaw.

FIG. 7 shows a further alternative embodiment of the implant according to the invention.

Of course, preferred details of the embodiments shown in Figures 1 to 7 can be combined.

FIG. 1 shows the cross section of a preferred embodiment of an implant (100) according to the invention. The implant (100) comprises an implant body (10), a distraction membrane (20) and a connecting element (30).

The apical region (11) of the implant body (10) has a thread for screwing or boring the implant body (10) in a bone. The coronal section (12) of the implant body (10) is designed as a toothed rack. The implant body (10) has a hole (14) through which a crown (13) can be attached. The distraction membrane (20) has a contact surface (21) and a counter-surface (22). The contact surface (21) is preferably formed by a coating, for example of a mineral material. The distraction membrane (20) is connected to the implant body (10) via the connecting element (30) such that the membrane (20) can be moved or displaced along the implant body (10). The connecting element (30) has a partially conical spacer sleeve (32). In this, the membrane (20) is engaged, screwed or glued. In the spacer sleeve (32) an adjusting nut (37) is rotatably mounted, which has an internal thread. By turning the adjusting nut (37), the spacer sleeve (32) and thus also the membrane (20) along the implant body (10) can be moved. The adjusting nut (37) is thus a rotatably mounted threaded body, which is in operative engagement with the rack of the coronal portion (12) of the implant body (10).

FIG. 2 shows a side view (A) and a plan view (B) of the implant (100) according to the invention from FIG. 1. Shown again are the implant body (10) with apical area (1 1) and coronal section (12) and hole (14) for securing a crown, the distraction membrane (20) with contact surface (21) and counter surface (22) and the connecting element (FIG. 30) with spacer sleeve (32) and adjusting nut (37). The membrane has interconnecting perforations or pores (23) which exchange material and blood between the tissue adjacent to the contact surface (21) and the tissue on the opposite surface. allow (22) adjacent tissue. The implant body (10) is passed through a hole (25) in the membrane (20).

The adjusting nut (37) has a plurality of points (38) for a tool, so that the adjusting nut can be easily rotated and thus can be moved with its internal thread along the rack.

FIG. 3 shows the implant (100) according to the invention from FIG. 1 with connected membrane (A) and with membrane (B) not yet connected. Shown again are the implant body (10) with apical area (1 1) and coronal section (12) with rack and hole (14) for securing a crown, the distraction membrane (20) with contact surface (21), counter surface (22) and interconnecting Perforations or pores (23) and the connecting element (30) with spacer sleeve (32) and adjusting nut (37) with a plurality of points of engagement (38).

In Figure 3B, the membrane is not yet attached to the spacer sleeve (32). The implant body (10) can be passed through the hole (25) in the membrane (20) for securing the membrane (20). Then, the membrane (20) with the ring (26), which may be configured, for example, as a groove of a tongue and groove connection or as a locking element, clicked into the spacer sleeve (32) or snapped, the implant body (10) already by a Hole (35) in the spacer sleeve (32) is passed. FIG. 4 shows an alternative embodiment of the implant (100) according to the invention in side view (A) and cross section (B). Shown again are the implant body (10) with apical area (11) and coronal section (12) with toothed rack and hole (14) for securing a crown (13), the distraction membrane (20) with contact surface (21), counter surface (22 ) and interconnecting perforations or pores (23) and the connecting element (30) with spacer sleeve (32).

The connecting element (30) is designed here such that the spacer sleeve (32) forms a housing of a worm gear, in which a threaded body in the form of a worm (33) is rotatably mounted in the spacer sleeve (32) such that the worm (33) and the rack (12) are in operative engagement. The rotational movement of the worm (33) can thus be translated into a translational movement of the connecting element (30) and thus of the diaphragm (20) on the rack (12). The worm (33) has a point of application (34) for a tool, for example an Allen wrench, so that the worm (33) can be turned easily.

FIG. 5 shows a further alternative embodiment of the implant (100) according to the invention in the assembled state (A) and in individual parts (B).

Shown again are the implant body (10) with apical region (1 1) and coronal section (12) with rack, the distraction membrane (20) with contact surface (21), counter surface (22) and interconnecting perforations or pores (23) and the verbin - element (30).

In this embodiment, the spacer sleeve (32) is an internal thread with an external thread (36) of the connecting element (30) screwed (A) or screwed (B). The membrane (20) is screwed (A) or screwed (B) via an internal thread in its hole (25) with an external thread (35) of the spacer sleeve (32). The connecting element (30) is configured here so that in the housing (31) a threaded body in the form of a worm (33) is rotatably mounted in the housing (31) such that the worm (33) and the rack (12) in Intervene. The rotational movement of the worm (33) can thus be translated into a translational movement of the connecting element (30) and thus of the diaphragm (20) on the rack (12). The worm (33) has a point of engagement (34) for a tool, for example an Allen key, so that the worm (33) can be easily rotated. FIG. 6 shows the alternative embodiment of an implant (100) according to the invention of FIG. 5 during a distraction in the jaw region (50).

Shown again are the implant body (10) with apical area (1 1) and coronal section (12) with toothed rack, the distraction membrane (20) with contact surface (21), counter surface (22) and interconnecting perforations or pores (23 ) and the connecting element (30) with spacer sleeve (32), housing (31), worm (33) and engagement point (34). The membrane (20) is screwed via an internal thread in its hole (25) with an external thread (35) of the spacer sleeve (32).

Furthermore, a jawbone (51) with two teeth (52) can be seen. The jawbone (51) has a bone defect into which the apical part (11) of the implant body (10) is screwed.

With this structure, an inventive method for bone structure is possible. In this case, the membrane (20) via the connecting element (30) by daily or half-daily turning the screw (33) via a to the point (34) attaching tool at a rate of 0.2 mm to 2.5 mm per day from the bone defect away. As a result, tissue (54) resting on the contact surface (21), in particular callus, becomes distraction pulses which trigger bone formation. Above the membrane (20) is connective tissue (53).

Due to the interconnecting perforations or pores (23) of the membrane (20), it is possible to exchange substances and blood between the tissue (54) resting against the contact surface (21) and the tissue (53) resting against the counter surface (22).

FIG. 7 shows a further alternative embodiment of an implant (100) according to the invention. Shown again are the implant body (10) with an apical area (11) and a coronal section (12) with a rack and hole (14) with a crown (13) fastened therein.

The distraction membrane (20) is in this embodiment directly with its counter surface on the conical spacer sleeve (32) ausge- staltet connecting element (30) attached. Alternatively, the base of the conical spacer sleeve (32) may be formed as a membrane. The contact surface (21) is formed by a layer of a mineral material. The connecting element (30) with spacer sleeve (32) is again moved along the implant body via a rotatably mounted threaded body designed as an adjusting nut (37).

The size of the base of the conical spacer (32) can be adjusted in an advantageous manner over the angle (39), so that different spacers (32) can be used with different footprint size, but have the same height and thus in their dimensions to the length of the implant body (10) are suitable.

The membrane is (20) is designed bioresorbable here. The membrane (20) can be connected via a conical clamping fit with the spacer sleeve (32), since the cone of the spacer sleeve in the direction of the tip (1 1) of the implant body (10) increases. After completion of the distraction, ie a relatively short time of weeks follows the consolidation time, ie a relatively long time of months in which the bioresorbable membrane by progressive absorption, especially at the edges of the membrane is no longer held by the conical spacer sleeve and the Spacer sleeve can be easily removed.

Claims

Implant, comprising an implant body and a distraction membrane, wherein the distraction membrane is connected to the implant body via a connecting element, the connecting element being movably arranged over at least a portion of the longitudinal axis of the implant body and wherein the movable arrangement of the connecting element enables the distraction membrane to be displaced along the longitudinal axis of the implant body is made possible over at least a portion of the longitudinal axis.

Implant according to claim 1, wherein the implant is a dental implant.

Dental implant according to one of the preceding claims, wherein the dental implant is a temporary implant, preferably a tap.

Implant according to one of the preceding claims, wherein the distraction membrane has a hole through which the implant body extends.

Implant according to one of the preceding claims, wherein the connecting element comprises a gear, in particular a self-locking gear, for moving the distraction membrane along the longitudinal axis of the implant body.

6. Implant according to one of claims 4 or 5, wherein the hole in the distraction membrane has an internal thread and the connecting element has an external thread, wherein the external thread of the connecting element can be screwed into the internal thread of the distraction membrane.

7. Implant according to one of claims 4 or 5, wherein the distraction membrane is connected to the connecting element via a tongue-and-groove connection or via a click closure.

8. Implant according to one of the preceding claims, wherein the connecting element has a spacer sleeve.

9. Implant according to one of the preceding claims, wherein the implant body has a lower portion along its longitudinal axis with a thread and has a second portion above the lower portion, the second portion being designed as a rack.

10. Implant according to claim 9, wherein the connecting element has a housing with a passage and a threaded body, the rack being inserted through the housing in the longitudinal extension through the passage at least substantially without play, and wherein the threaded body is rotatably mounted in the housing in such a way, that the threaded body and the rack are in effective engagement.

1 1 . Implant according to claim 10, wherein the housing is designed as a spacer sleeve.

12. Implant according to claim 10, wherein the connecting element has a spacer sleeve and a housing, wherein the housing has an external thread at one end and wherein the spacer sleeve has at least partially a conical shape and wherein the spacer sleeve has an external thread at the first end with the smaller diameter Screwing into the internal thread of the membrane and wherein the spacer sleeve has an internal thread at the second end opposite the first, into which the external thread of the housing can be screwed.

13. Implant according to claim 8, wherein the connecting element is designed as a spacer sleeve and wherein the membrane is attached to a surface of the spacer sleeve.

14. Implant according to claim 8, wherein the connecting element is designed as a spacer sleeve and wherein the membrane is formed from a surface of the spacer sleeve.

15. Implant according to one of the preceding claims, comprising a crown.

16. Implant according to one of the preceding claims, wherein the membrane consists of a resorbable material.

17. Implant according to one of the preceding claims, wherein the implant body consists of a resorbable material, zirconium or a metal.

18. Implant according to one of the preceding claims for use in bone distraction.