TITANIUM MESH COVERED WITH BIOCOMPATIBLE POLYPROPYLENE FILM FOR COVERING AND PROTECTING BONE GRAFTS/BIOMATERIALS AND PROCESS FOR OBTAINING SAME

Abstract

The present invention pertains to the field of biomaterials for covering and protecting bone grafts/biomaterials, and relates more specifically to a titanium mesh covered with a biocompatible polypropylene film that aims to increase bone volume using biomaterials or using grafts in their most varied forms, such as autogenous bone (bone from the individual), allogenous bone (bone from other individuals of the same species), and xenogenous bone (bone from individuals of a different species) for the subsequent installation of osteointegrated implants. When the claimed mesh protected with a polypropylene film is used, with the film blocking the holes, the materials used to increase the volume do not pass through the holes of the mesh, as they are blocked by the polypropylene film, making these meshes 100% waterproof. This makes it easy to remove the mesh and, as there is no penetration of material through the holes, the implants are installed over a large amount of bone tissue. When using the titanium mesh with the polypropylene film, in contrast to when it does not have this protection, it does not need to be completely covered by surgical flaps, facilitating the surgical technique and thus avoiding post-operative complications due to exposure that often occurs with unprotected meshes. In addition, it is advantageous that the mesh can be kept intentionally exposed to the mouth environment, placed over the materials used to achieve bone volume augmentation, regardless of the materials used underneath it, whether grafts or biomaterials (synthetic materials). This brings greater comfort to the patient, as it provides a post-operative period with very low morbidity and a rapid recovery.

Claims

1. Mesh for covering and protecting bone grafts/biomaterials, formed by titanium mesh (5) covered by a pellicle of biocompatible polypropylene film on both sides, consisting of an internal surface (3) and an external surface (4) that have roughness that can vary from 0.1 to 0.9 m, such that the titanium mesh (5) remains in between the polypropylene films, characterized by having an edge (2) of at least 1 mm.

2. Mesh for covering and protecting bone grafts/biomaterials, according to claim 1, and so that the strip of the internal surface (3) and the external surface (4) achieves a roughness of up to 10 m, being characterized by the film being able to be subjected to surface treatment by friction, dry or wet thermal treatment.

3. Process for obtaining the mesh described in claim 1, characterized by comprising the following steps: a) Two pellicles of this film cover the titanium mesh (5) on both sides, promoting a seal through the perforations in the mesh, as well as in the areas beyond the size of the mesh, forming a film-film sealing edge (2); b) In the regions of the mesh (5), film-Ti and film-film adhesion occurs, through the mesh perforations; c) The film is overlaid on both sides of the titanium mesh by passing it through rollers that are heated to up to 150 C. in a thermal laminator, which promotes film-Ti sealing in the region where there is no perforation in the titanium mesh and film-film in the perforated region of the titanium mesh; d) After sealing, the product leaves the machine continuously, and the polypropylene film is cut between one titanium mesh and another.

Description

DESCRIPTION OF THE ATTACHED DRAWINGS

[0012] In order for this invention to be fully understood and put into practice by any technician in this technology segment, it will be described in a clear, concise and sufficient way, based on the attached drawings, which illustrate and support it, listed below:

[0013] FIG. 1 represents the top and sectional view of the titanium mesh in between the polypropylene film;

[0014] FIG. 2 represents the top view of the perforated titanium mesh;

[0015] FIG. 3 represents the perspective view of the polypropylene film.

DETAILED DESCRIPTION OF THE INVENTION

[0016] The product (1) is manufactured from a titanium mesh (5) covered by a biocompatible polypropylene film on both sides, consisting of an internal surface (3) and an external surface (4), in such a way that the titanium mesh (5) remains in between the polypropylene films, and may have an edge (2) of at least 1 mm, or not necessarily have said edge (2).

[0017] The internal surface (3) has a roughness that can vary from 0.1 to 0.9 m and the external surface (4) has a similar roughness of 0.1 to 0.9 m.

[0018] The film (2) used is a polypropylene film, which in itself has different roughness, and can be worked on by modifying its internal (3) or external (4) surfaces, keeping the intrinsic roughness of the material or being subjected to some surface treatment in order to increase it. Friction, dry or wet thermal treatments allow the internal surface band (3) and the external surface (4) to achieve roughness of up to 10 m.

[0019] The treatment can only occur on the raw material, that is, on the polypropylene film (2), as can occur on the polypropylene film (2) with the titanium mesh (5).

[0020] The manufacturing process occurs through the following steps: a) Two layers of this film cover the titanium mesh (5) on both sides, promoting sealing through the perforations in the mesh, as well as in areas beyond the size of the mesh, that is, free from the mesh, forming a film-film sealing edge (2); b) In the regions of the mesh (5), film-Ti and film-film adhesion occurs, through the perforations in the mesh, which generates double sealing protection, making the mesh remain intact until its complete role is fulfilled; c) The film is overlaid on both sides of the titanium mesh, promoting adhesion by passing through rollers that are heated to 150 C. in a thermo-laminator, thus promoting Ti-film sealing in the region where there is no perforation in the titanium mesh and film-film in the perforated region of the titanium mesh: d) After sealing, the product will exit the machine continuously, then the polypropylene film is cut between one titanium mesh and another, obtaining different products (1).

[0021] The polypropylene film itself with the mesh is an innovation, as it is always used without a mesh. The perforations in the mesh (5) are to reduce weight and make it more malleable, in addition to providing a place for fastening screws to pass through when necessary.

[0022] More particularly, suitable formats and dimensions can be assumed to meet different treatment needs for guided bone regeneration, being manufactured in biocompatible polypropylene film so that both surfaces (3)(4) can be in contact with the oral environment or in contact with the graft or biomaterials. In other words, there is no concern about which side should be exposed to the oral environment, since taking the standard deviation verified in the roughness tests, both can be considered equal regarding the external or internal side of the film. Although the sides present some degree of difference in roughness.

[0023] The product incorporates the metal mesh (5) in between the polypropylene film, with the aim of structuring the product when used in larger bone defects, being able to occupy the entire area or partial areas-when using the mesh, it will be defined by the size of the defect to be regenerated, that is, it can be used by customizing it through cutting to better adapt to the defect. The surface that is exposed to the oral environment makes it difficult for food residue to accumulate, as well as the colonization of microorganisms, protecting the filling material used. Due to the lack of porosity in the film, there is no need to completely cover the mesh. Furthermore, the titanium mesh (5) integrated into the film does not allow the adhesion of soft or calcified tissues, greatly facilitating their removal after cicatrization.

[0024] It is important to highlight that the figures and description made do not have the power to limit the ways of implementing the inventive concept proposed herein, but rather to illustrate and make understandable the conceptual innovations revealed in this solution. Therefore, the descriptions and images must be construed in an illustrative and non-limiting way, and there may be other equivalent or analogous ways of implementing the inventive concept revealed herein and which do not deviate from the spectrum of protection outlined in the proposed solution.