EP3700592A1

EP3700592A1 - Biocompatible soft tissue implant

Info

Publication number: EP3700592A1
Application number: EP18795509.1A
Authority: EP
Inventors: Karl-Heinz HEFFELS; Denis Reibel; Dirk Grafahrend; Guenter Germann; Oliver Boegershausen
Original assignee: Carl Freudenberg KG
Current assignee: Carl Freudenberg KG
Priority date: 2017-10-26
Filing date: 2018-10-26
Publication date: 2020-09-02
Also published as: JP2021500178A; WO2019081700A1; US20200289716A1; CN111315418A; EP3700591A1; US20200289715A1; WO2019081708A1; CN111278474A; RU2020117044A3; JP2021500170A; RU2739357C1; DE102017009989A1; RU2020117044A; BR112020006394A2; BR112020006403A2

Abstract

The invention relates to a biocompatible soft tissue implant (1) for insertion into a human body, comprising at least one layer (2) which comprises an elastomer material, and at least one textile fabric (3) which is arranged on this layer (2) and forms the top surface of the soft tissue implant (1), the textile fabric (3) having bioresorbable fibers that are at least partially embedded in the elastomer material layer (2).

Description

Biocompatible soft tissue implant

description

The present invention relates to a soft tissue implant for implantation in a human body. The invention further relates to a method for producing the soft tissue implant.

Materials which are to be introduced into a human body are subject to stringent requirements, for example good biocompatibility. Biocompatibility refers to the property of materials in a biological environment adapted to the situation,

perform predetermined functions while at the same time acceptable

Reaction of the host body to the material. This is checked for medical devices within the scope of their approval according to the standard DIN EN ISO 10993. In the following we mean "biocompatible" materials, those which have passed the test according to DIN EN ISO 10993 (year).

Particularly high demands are placed on materials that are to remain as implants permanently in the human body. An implant is a material that is implanted in the body and is intended to remain in the human body permanently or for a period of a few days to 10 years. Medical implants have the task of supporting body functions or replace, while in plastic implants the shape, if necessary

destroyed, body parts to be restored or changed.

For example, breast implants are used as implants for soft tissue, for breast reconstruction or breast augmentation. Further

Applications for such soft tissue implants are prostheses for the

Calf muscles or cheek, nose, buttock, testis or humerus implants.

The silicone often used in implants is basically

biocompatible, yet occasionally unwanted immune reactions occur. The immune system of the host body is activated after implantation and tries to resorb the foreign material. If the immune cells do not resorb due to the foreign material properties, the body begins to surround the implant with a fibrous sheath and thereby separate from the surrounding tissue. This separation is at least then of concern when the capsule of scar tissue hardens and to

Deformations of the surrounding tissue leads.

It is known that the surface and structure of an implant are crucial for the handling of the host body with the implant. Thus, structured surfaces show a higher acceptance of the host bodies with less occurrence of the capsule formations described above. A disadvantage of the commonly used structured materials is that they do not allow a direct interaction of the body's own tissue with the implant, so that they are not 100% fixed at the implantation site (US 2012/0209381 Allergan, structured surface less capsule contraction).

Another approach is to use biocompatible materials for the surface of implants that can interact with the host body. These can be bioresorbable materials that can be decomposed and metabolized by the body's own cells. Be this Materials designed as support structures, cells can migrate into these structures to build new, endogenous tissue. The

Supporting structure material is meanwhile absorbed (US 6,638,308 B2

Bioresorbable breast implant) (WO 96/18424: Breast Tissue Engineering).

There are currently no products on the market that follow this approach. Presumably, this is because the implants would lose their function in the course of absorption. On this basis, the invention is based on the object

Soft tissue implant, in particular to provide a breast implant for introduction into a human body, which has the aforementioned disadvantages

at least partially overcomes and in particular when introduced into the human body is well accepted by the immune system and has a good long-term stability.

This object is achieved by a biocompatible soft tissue implant, in particular breast implant for introduction into a human body comprising at least one layer comprising an elastomeric material, and at least one arranged on this layer and the surface of the

Soft tissue implant textile fabric, wherein the textile

Fabric bioresorbable fibers which are at least partially embedded in the position of elastomeric material. In the soft tissue implant according to the invention, the connection between the textile fabric and the elastomeric material can be communicated via the bioresorbing fibers, which are at least partially embedded in the layer of elastomeric material. This embedding can be obtained, for example, that the textile fabric on an elastomeric precursor material, for example an unvulcanized silicone layer is applied and pressed into this. The impressions have the purpose of introducing the fibers of the textile fabric into the precursor layer. Subsequently, the composite, for example by vulcanization of the precursor to form the

solidified elastomeric material and cured in its elastomeric portion.

By embedding the bioresorbable fibers in the position

elastomeric material can be a stable composite material with high

Layer adhesion can be obtained. Here, a high layer adhesion is to be understood that the soft tissue implant can be handled in the usual way and, for example, can be introduced into the human body, without the adhesion between elastomeric material and textile

Flat structure dissolves.

In addition, the soft tissue implant according to the invention offers the

Introducing into a human body a variety of other benefits.

Thus, it is advantageous for the soft tissue implant to have a surface which is formed from a textile material which has bioresorbable fibers, since biocompatibility-enhancing interaction with the surrounding tissue is possible as a result. Textile fabrics have a three-dimensional structure due to their fiber structure. As explained above, structured surfaces can reduce the frequency of occurrence of

minimize unwanted immune responses so that such a surface is eminently suitable for implants and other medical products that interact with the body as a biological system. Nonwovens are particularly preferred since the fibers are present there as a random knit and have a strong three-dimensional structuring. One possible measure of the extent of the three-dimensional structuring of the surface is the average pore size of the textile fabric.

Preferably, the textile fabric has a mean pore size of 50 μιτι to 300 μιτι, preferably from 70 to 250 μιτι, more preferably from 100 to 200 μιτι on. The pore size is measured before introduction into the elastomeric material. It is measured according to ASTM E 1294 (1989).

The bioresorbable fibers may be resorbed after being introduced into the body over time. It is advantageous that the bioresorbable fibers are also present within the elastomeric layer, as in bioresorption

Cavities formed in the position of elastomeric material, comparable to a dynamically changing, three-dimensional structuring on the surface of the soft tissue implant. Over time, the layer of elastomeric material is thus provided with cavities. As a rule, the formation of the cavities takes place continuously, with preferably more than half, more preferably more than 75% by weight, in particular more than 90% by weight, of the textile fabric being absorbed after 60 days. As a result, the layer of elastomeric material is successively to the surface layer of

Soft tissue implant, which can be given a permanent structuring with the aforementioned advantages. The dynamic

changing surface provides, already during the absorption, the

a three-dimensional environment, which can be colonized by them and converted by normal wound healing processes. As a result, the soft tissue implant according to the invention allows ingrowth of body tissue and consequently a stepwise replacement of the textile

Textile structure through the body's own tissue.

A further advantage of the soft tissue implant according to the invention is that, at least in the first time after introduction into the body, the surface of the elastomeric material is absorbed by the bioresorbable coating Body can be separated from the tissue, which increases its acceptance and tissue compatibility after implantation.

In addition, the soft tissue implant according to the invention is characterized in that it can have excellent elasticity due to the use of an elastomeric material. As a result, a good adaptation to deforming forces outside and inside the body can be ensured. The high elasticity is particularly advantageous if the soft tissue implant, for example, as a breast implant to be introduced by the smallest possible body opening in the body. Its high elasticity allows the soft tissue implant to deform severely, for example, to be lengthened to pass through the small

Body opening can be brought into the body. In a preferred embodiment of the invention, the soft tissue implant is characterized by an elasticity measured according to DIN 53504 S2 at a rate of 200 mm / min from 50% to 500%, preferably from 200% to 500%, more preferably from 400% to 500%. It was surprising for the person skilled in the art that the soft tissue implant according to the invention can have such a high elasticity. In particular, it was expected that at

Tensile load delamination of the coating occurs. That this can be avoided is probably due to the high layer adhesion of the soft tissue implant according to the invention. The beneficial effects are more pronounced the longer the time that the soft tissue implant is to remain in the human body.

Naturally, the effects caused by the three-dimensionally structured surface become more pronounced the greater the proportion of the textile fabric on the surface of the implant. Thus, in an advantageous embodiment of the invention, the proportion of the textile Area at the surface of the soft tissue implant more than 50%, more preferably more than 70%, more preferably more than 90% and in particular 100%. The above values refer to the state before introduction into the human body.

The bioresorbable fibers may comprise a wide variety of fiber materials. Preferably, the fibers comprise bioresorbable fiber materials selected from the group consisting of natural polymers, proteins, peptides, sugars, chitosan, chitin, gelatin, collagen, polyvinyl alcohol, polyvinylpyrrolidone, dextran, pullulan, hyaluronic acid, polycapolactones, polylactides, polyglycolides, polyhydroxyalkanolates, polydioxanones,

Polyhydroxybutyrates, polyanhydrides, polyphosphoric esters, polyester amides and mixtures thereof and copolymers and / or consist of at least 70 wt.% And / or at least 80 wt.% And / or at least 90 wt.% And / or at least 95 wt.% from them, each related to the

Total weight of bioresorbable fibers.

In a further embodiment of the invention, the fiber material consists entirely of the abovementioned materials, with customary auxiliaries, for example catalyst residues, also being present in the fiber material.

In a particularly preferred embodiment of the invention, the fibers exclusively comprise gelatin as bioresorbable fiber material and / or consists of at least 70% by weight, and / or at least 80% by weight, and / or at least 90% by weight, and / or At least 95% by weight of gelatin, in each case based on the total weight of the bioresorbable fibers. Porcine gelatin is preferred according to the invention, since these are not

The carrier of bovine spongiform encephalopathy (BSE) is.

In addition, the bioresorbable fibers usually contain water. For example, in an amount of 1% by weight to 15% by weight. In a further preferred embodiment of the invention, the bioresorbable fibers additionally contain at least one hydrophilic additive. This is preferably also bioresorbable. Preferably, the hydrophilic additive is selected from the group consisting of: carbomer [9003-01 -4], ethyl acetate, polymer with 1-ethenyl-2-pyrrolidinone [25086-89-9], 1-ethenyl-2-pyrrolidinone homopolymer [9003- 39-8], cellulose

hydroxypropylmethylether [9004-65-3], polycarbophil [9003-97-8], 1-ethylen-2-pyrrolidinone homopolymer [9003-39-8], methylcellulose (E 461), ethylcellulose (E 462), hydroxypropylcellulose (E 463 ), Hydroxypropylmethylcellulose (E 464), methylethylcellulose (E 465), sodium carboxymethylcellulose (E 466),

Hydroxyethylcellulose, hydroxybutylmethylcellulose, cellulose glycolate

Carboxymethylcellulose, cellulose acetate (e.g., available from Chisso, Eastman), cellulose acetate butyrate (e.g., available from Eastman, FMC),

Cellulose acetate maleate, cellulose acetate phthalate (e.g., available from Eastman, FMC, Parmentier), cellulose acetate trimellitates (e.g., available from Eastman, Parmentier), cellulose fatty acid esters (cellulose dilaurate, cellulose dipalmitate, cellulose distearate, cellulose monopalmitate, cellulose monostearate,

Cellulose trilaurate, cellulose tripalmitate, cellulose tristearates, agar [9002-18-0], alginic acid [9005-32-7], ammonium alginate [9005-34-9], calcium alginate [9005-35-0], cellulose, carboxymethyl ether, calcium salt [9050- 04-8], cellulose, carboxymethyl ether, sodium salt [9004-32-4], carrageenan [9000-07-1], carrageenan [9062-07-1], carrageenan [1 1 1 14-20-8], carrageenan [ 9064-57-7], cellulose [9004-34-6], carob gum [9000-40-2], corn starch and

pregelatinized starch, dextrin [9004-53-9], cellulose, 2-hydroxyethyl ether [9004-62-0], hydroxyethylmethylcellulose [9032-42-2], cellulose, 2-hydroxypropyl ether [9004-64-2], cellulose, 2 Hydroxypropyl ether (low substituted) [9004-64-2], hydroxypropyl starch [1 13894-92-1], ethenol,

Homopolymer [9002-89-5], potassium alginate [9005-36-1], sodium hyaluronate

[9067-32-7], Starch [9005-25-8], pregelatinized starch [9005-25-8]

Polyethylene oxide, polyethylene glycol. In this case, the abovementioned hydrophilic additives are present, for example, in an amount of from 0.1% by weight to 30% by weight, preferably from 0.5% to 20%, more preferably from 1% to 10%, each based on the total weight of the bioresorbable fibers.

Particularly preferred according to the invention are sodium hyaluronate,

Hyaluronic acid, polyethylene oxide and polyethylene glycol.

An advantage of the use of the hydrophilic additives is that with them a particularly high initial wettability of, for example, less than 10 seconds, preferably less than 5 seconds, more preferably less than 2 seconds can be achieved. The high initial wettability is advantageous to the fabric before the introduction of the soft tissue implant in the

to be able to soak the human body with active ingredient solutions.

In particular with regard to the use of the invention

Soft tissue implant in the human body can do it in particular

be useful if in and / or on the bioresorbable fibers one or more drugs selected from the group consisting of

antimicrobials, anesthetics, anti-inflammatory agents,

Antinarbenmittel, antifibrotic agents, chemotherapeutic agents and leukotriene inhibitors. Antimicrobials and / or antibiotics are particularly suitable for preventing infection.

The bioresorbable fibers may be continuous filaments or staple fibers, continuous filaments being understood to be fibers of theoretically unlimited length and staple fibers are fibers of limited length. In a preferred embodiment of the invention, the bioresorbable fibers are formed as continuous filaments and / or staple fibers with a minimum length of 5 mm, for example of 5 mm to 10 cm. In practical

Experiments have shown that such long fibers can penetrate into the layer of elastomeric material particularly well. In a further preferred embodiment of the invention, the textile fabric has a basis weight of from 10 to 300 g / m ² , preferably from 50 to 200 g / m ² , more preferably from 70 to 150 g / m ² . This has proved to be advantageous since a sheet with these basis weights has sufficient stability to be applied wrinkle-free on a variety of layers of elastomeric material three-dimensional geometry can.

In addition, can be obtained over the aforementioned basis weights a fabric with good mechanical strength. Thus, the textile fabric measured with a width of 20 mm can be given a maximum tensile force of at least 0.5 to 100N, preferably from 1.0 to 50N, more preferably from 2.0 to 30N. This is advantageous because a minimum maximum tensile force for the processing of the textile

Sheet is required.

The period of time within which the textile fabric is absorbed depends on various parameters and, among other things, on the thickness of the textile fabric. Against this background, it has proved to be expedient in most cases the textile fabric, with an average thickness of less than 2 mm, preferably from 5 to 700 nm

embody.

The textile fabric may in principle comprise one or more fiber layers. Particularly preferably, it comprises only one fiber layer, since adhesion problems, as often occur between multiple fiber layers, can be avoided.

The textile fabric can also be used in a wide variety of applications

Embodiments are present, for example as a woven, knitted or nonwoven fabric. In this case, nonwovens, as stated above, according to the invention particularly preferred, in particular in a rotary spinning process produced nonwovens. In rotary spinning processes nonwovens can be produced, for example, by using a fiber material

containing fluid is provided, which as a melt, solution,

Dispersion or suspension may be present, the fluid spun by rotation spinning, stretched and deposited into a nonwoven. This technique can be used at low temperatures up to 60 ° C. This allows a particularly gentle processing of the biopolymers and active ingredients. Nonwovens which are particularly preferred according to the invention are nonwovens, as described in WO 2008/107126 A1, WO 2009/036958 A1, EP 2 409 718 A1, EP 2 042 199 A1, EP2129339 B1, CA2682190C. The aforementioned

Publications are incorporated by reference into the present invention.

The layer of elastomeric material may comprise a wide variety of elastomeric materials. Of these materials, silicone elastomers, particularly medical grade silicone elastomers, are particularly preferred because they are relatively inert and do not react with the body.

The layer of elastomeric material preferably comprises at least 70% by weight and / or at least 90% by weight and / or at least 95% by weight of the abovementioned silicone elastomers. Most preferably, the layer of elastomeric material to 100 wt.% Of silicone elastomers medical grade, which may contain conventional additives.

The thickness of the layer comprising the elastomeric material may vary depending on the materials used and the intended use. As a rule, have thicknesses in the range of 100 μιτι to 5000 μιτι, preferably from 100 μιτι to 4000 μιτι more preferably from 100 μιτι to 3000 μιτι proven. The layer of elastomeric material may in principle comprise one or more layers In one embodiment of the invention, the soft tissue implant has a carrier layer. This is preferably arranged on the side of the layer facing away from the textile fabric, comprising the elastomeric material. Preferably, the carrier layer consists of a biocompatible material, since this can remain in the soft tissue implant and meets the requirements for introduction into the human body. For this reason, the carrier layer preferably consists of an elastomeric material, in particular silicone. It is also conceivable the use of others

Carrier layers, such as films, plates or impression body.

Another object of the present invention is the formation of the soft tissue implant as a breast implant. In this case, an implant is to be understood as a material implanted in the body which is to remain there permanently or at least for a period of time, for example from a few days to 10 years.

In a particularly preferred embodiment of the invention that is

Soft tissue implant designed as a breast implant, and has the following

Features: the layer of elastomeric material is in the form of a bubble-like sheath,

the envelope can be filled and / or filled with a liquid to viscous filling material,

the bioresorbable fibers having textile fabrics is arranged as a coating on the outside of the shell.

In such implants, the entire surface of the coating can be formed, so that the aforementioned advantages are particularly efficient can be exploited. According to the invention, in this embodiment, therefore, the coating completely covers the outside of the envelope.

Conveniently, the soft tissue implant is shaped so that it can fill a cavity in shape and size in the human body.

The soft tissue implant according to the invention can in a preferred

Embodiment of the invention are prepared by a method comprising the following steps:

1 . Providing a carrier layer;

2. application of a biocompatible elastomeric precursor material,

in particular unvulcanised silicone, on one side of

Support layer;

3. Applying a bioresorbable fibers having textile

Sheet on the elastomeric precursor material such that the fibers of the fabric at least partially penetrate into the elastomeric precursor material;

4. Crosslinking of the elastomeric precursor material to an elastomeric material.

The first method step comprises providing a carrier layer.

Preferably, a biocompatible material is used as a carrier layer, since this can remain in the soft tissue implant and meets the requirements for introduction into the human body. For this reason, the carrier layer preferably consists of an elastomeric material, in particular silicone. It is also conceivable the use of others

Carrier layers, such as films or impression body. The second method step comprises the application of a biocompatible elastomeric precursor material, in particular unvulcanized Silicone, on one side of the backing layer. As the elastomeric precursor material, a wide variety of materials, such as unvulcanized and / or incompletely vulcanized silicone can be used. These materials can be converted into elastomeric materials by crosslinking in the form of vulcanization. When using silicone in the carrier layer and a

elastomeric silicone precursor material is advantageous in that a particularly homogeneous connection between the layers is formed, since then both layers have the same properties. The third method step comprises the application of a bioresorbable fibers having textile fabric on the elastomeric precursor material such that the fibers of the fabric at least partially penetrate into the elastomeric precursor material. The penetration of the fibers of the textile fabric into the elastomeric precursor material can be accomplished, for example, by pressurizing the composite of textile fabric and elastomeric precursor material. For this purpose, the elastomeric precursor material preferably has a

Viscosity of 200 mPa ^* s to 4000 mPa ^* s, more preferably from 300 mPa ^* s to 3000 mPa ^* s and in particular from 500 mPa ^* s to 2000 mPa ^* s on. As a textile fabric are preferably the above-mentioned textile

Sheets used. Particular preference is given to fabrics containing fibers of gelatin.

The fourth process step comprises crosslinking the elastomeric precursor material to an elastomeric material. When using

Silicon precursor materials, the crosslinking can be easily carried out by heating (vulcanization). It was surprising to the person skilled in the art that the crosslinking also works in the presence of a gelatin-containing textile fabric, since gelatin

is known to have a variety of functional groups. The latter are known to the skilled person as catalyst poison. It is conceivable to remove the carrier layer after the crosslinking step. When using a biocompatible carrier layer, however, it is preferred if it remains in the soft tissue implant.

As already stated above, the invention is suitable

Soft tissue implant excellent in training as a breast implant.

In a further embodiment of the invention, this also comprises the breast implant itself. In its embodiment as a breast implant, this preferably has a bubble-like sheath of elastomeric material, in particular of silicone, as a layer comprising an elastomeric material, wherein the sheath can be filled with a liquid to viscous filling material and / or filled. If an envelope which has not yet been filled with filling material is used, then it can be filled in a simple manner even after its connection to the textile fabric and subsequently closed.

The filling material may comprise a wide variety of materials.

Preferably, the filling material is selected from the group consisting of saline, viscous saline, silicone gel, hydrogel and

thermoreversible polymeric gel.

On the outside of the sheath, the implant has a textile fabric having bioresorbable fibers, the bioabsorbable fibers at least partially penetrating the sheath of elastomeric material.

Conveniently, the breast implant is shaped so that it can fill in shape and size a cavity in the human body. In summary, the soft tissue implant according to the invention

for example, by a method comprising the following steps: 1. Providing a bubble-like envelope of elastomeric material, wherein the envelope can be filled and / or filled with a liquid to viscous filling material;

2. applying an elastomeric precursor material, in particular unvulcanized silicone, to the outside of the envelope;

3. Applying a bioresorbable fibers having, textile

Fabric on the outside of the shell;

4. Treatment of the composite fabric and shell

For example, with pressure such that the fibers of the textile

Sheet at least partially penetrate into the shell;

5. Crosslinking of the material.

In the following the invention will be explained in more detail by means of an example.

Example: Production of a soft tissue implant according to the invention

The following starting materials are used to prepare an elastomeric precursor material: MED-6400A (component A) and MED-6400B (component B) NuSil technology. Components A and B are mixed at a weight ratio of 1: 1 at room temperature. The mixture is further processed bubble-free.

The resulting elastomeric precursor material is poured onto the surface of a bubble-like shell as a carrier layer. The envelope coated with elastomeric precursor material is held level for 30 minutes to level and evaporate the solvent.

Subsequently, a gelatin fleece is placed on the surface of the coated sheath. The composite of gelatin non-woven and silicone-coated shell is produced by crosslinking of the elastomeric precursor. This is done in a programmable oven with the following temperature program: 30 minutes at room temperature, 45 minutes at 75 ° C and 135 minutes at 150 ° C with constant change (programming).

After cooling the cured sample, a silicone / gelatin composite nonwoven fabric is obtained.

There are tensile tests for the obtained inventive

Soft tissue implant performed with a tensile tester according to DIN 53504 S2 with top speed of 200 mm / min.

Brief description of the figures

Fig. 1: Result tensile test pure silicone layer as a reference

Fig.2: Result tensile test of the soft tissue implant of Example 1

FIG. 3: Microscopic image of the surface of the soft tissue implant from Example 1 after two weeks storage at 37 ° C. in PBS

4: Schematic cross-section of an inventive

Soft tissue implant

Fig. 5: Schematic cross-section of a device according to the invention

Soft tissue implant in its embodiment as a breast implant.

6: Microscopic view of the sectional view of a soft tissue implant according to the invention.

figure description

FIG. 1 shows as a reference the result of a tensile test with a pure silicone layer. One recognizes a characteristic of elastomers linear course of the tension-tension curve. With maximum stresses of 0.4 MPa to 0.7 MPa with a maximum elongation of 200% to 300%.

FIG. 2 shows the result of a tensile test of the soft tissue implant from Example 1. The gelatin nonwoven in the composite causes a high

Stress of about 1 MPa at a low elongation of 10 - 20%. The maximum strain (HZD) has compared to the pure

Silicon layer almost doubled at 400% - 500%, presumably because the fibers tear and hold together independently of the elastomer. From 200% elongation, the voltage pickup increases linearly again. In this area, it is believed that the elastomer content increases the applied forces, whereas previously the forces were absorbed by the nonwoven fabric up to 200% elongation. The maximum tensile force (HZK) in this composite with 2.4 to 3 MPa is five times greater than with a pure silicone layer.

FIG. 3 shows a micrograph of the surface of the

Soft tissue implant from Example 1 after two weeks storage at 37 ° C in PBS. The crosslinked fibers are still visible at this time. FIG. 4 shows the schematic cross section of a device according to the invention

Soft tissue implant (1) comprising a layer (2) made of an elastomeric material, and a textile fabric (3) arranged on said layer (2) and forming the surface of the soft tissue implant, the textile fabric (3) comprising bioresorbable fibers at least partially capable of (2) embedded in elastomeric material. FIG. 5 shows the schematic cross section of a device according to the invention

Soft tissue implant (1) in its embodiment as a breast implant. The

Breast implant has a bubble-like sheath (4) made of elastomeric material, here made of silicone, wherein the sheath (4) with a liquid to viscous

Filling material (5) is filled. On the outside of the sheath (4), the implant has a textile fabric (3) having bioresorbable fibers, the bioabsorbable fibers at least partially penetrating the sheath (4) of elastomeric material.

FIG. 6 shows an electron micrograph of the sectional view of a soft tissue implant according to the invention. On the layer of elastomeric material, here silicone, is a gelatin fleece as a textile fabric

arranged. It can be clearly seen how the fibers of the gelatin fleece penetrate into the layer of silicone.

Claims

claims

1 . Biocompatible soft tissue implant (1) for insertion into a

human body comprising at least one layer (2) comprising an elastomeric material, and at least one on this layer (2) arranged and the surface of the soft tissue implant (1) forming textile fabric (3), characterized in that the textile fabric (3) bioresorbable Having fibers which are at least partially embedded in the layer (2) of elastomeric material.

2. Biocompatible soft tissue implant (1) according to claim 1, characterized

in that the embedding of the bioresorbable fibers in the layer (2) of elastomeric material has been obtained by applying the textile fabric (3) to an elastomeric precursor material, for example a non-vulcanised silicone layer, and pressing it into this.

3. Biocompatible soft tissue implant (1) according to claim 1 or 2, characterized in that textile fabric (3) is a nonwoven fabric.

4. Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that the textile fabric has a mean pore size of 50 μιτι to 300 μιτι, preferably from 70 to 250 μιτι, more preferably from 100 to 200 μιτι.

5. Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that after introduction into the body with time due to the bioresorption of the textile fabric (3) voids in the layer (2) of elastomeric material. Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized by an elasticity measured according to DIN 53504 S2 at a speed of

200 mm / min from 50% to 500%, preferably from 200% to 500%, more preferably from 400% to 500%.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that the proportion of the textile fabric (3) on the surface of the

Soft tissue implant (1) is more than 50%, more preferably more than 70%, even more preferably more than 90% and especially about 100%.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that the bioresorbable fibers comprise bioresorbable fiber materials selected from the group consisting of natural polymers, proteins, peptides, sugars, chitosan, chitin, gelatin, collagen, polyvinyl alcohol, polyvinylpyrrolidone , Dextran, pullulan, hyaluronic acid, polycapolactones, polylactides, polyglycolides, polyhydroxyalkanolates, polydioxanones, polyhydroxybutyrates, polyanhydrides,

Polyphosphorestern, polyester amides and mixtures thereof and copolymers and / or at least 70 wt.% And / or at least 80 wt.% And / or at least 90 wt.% And / or at least 95 wt.% Consist of them, respectively on the total weight of bioresorbable fibers.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that in and / or on the bioresorbable fibers one or more

Drugs selected from the group consisting of antimicrobial Agents, anti-inflammatory agents, Antinarbenmittel, antifibrotic agents, chemotherapeutic agents and leukotriene inhibitors is present.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that the bioresorbable fibers are formed as continuous filaments and / or staple fibers with a minimum length of 5 mm, for example from 5 mm to 10 cm.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that the textile fabric (3) is a nonwoven fabric produced in a rotary spinning process.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, characterized in that the layer of elastomeric material (2) comprises silicone elastomers.

Biocompatible soft tissue implant (1) according to one or more of the preceding claims, designed as a breast implant for

Implantation into a human body, characterized in that it comprises the following features: the layer of elastomeric material is in the form of a bubble-like sheath (4),

the casing (4) can be filled and / or filled with a liquid to viscous filling material (5),

the bioresorbable fibers having textile fabric (3) is arranged as a coating on the outside of the shell (4).

14. A method for producing a biocompatible soft tissue implant (1) according to one or more of the preceding claims, comprising the following steps:

Providing a carrier layer;

Applying a biocompatible elastomeric precursor material, in particular unvulcanized silicone, to one side of the carrier layer;

Applying a bioresorbable fiber-containing textile fabric to the elastomeric precursor material such that the fibers of the textile fabric at least partially penetrate into the elastomeric precursor material;

Crosslinking of the elastomeric precursor material to an elastomeric material.