摘要:
A method of completing a fiber composite part includes the steps of providing a pre-manufactured fiber composite part, the fiber composite part including a structure of fibers embedded in a matrix of a resin, the resin being hardened; inspecting the composite part for portions of the structure of fibers that are insufficiently impregnated by the hardened resin; applying a preparation of a hardenable material to a surface portion where an identified structure portion of the structure of fibers that is insufficiently impregnated is exposed; applying mechanical vibration to the preparation applied to the surface portion to cause material of the preparation to impregnate the structure portion in a flowable state, and causing the material to solidify.
摘要:
In order to anchor a suture in tissue, a device is proposed which has a guide sleeve, a sonotrode, an anchor, and the suture. The guide sleeve comprises a distal part having a smaller cross-section and a proximal part having a larger cross-section. The sonotrode extends in the lumen of the guide sleeve and comprises a distal end and a proximal end, wherein the proximal end is equipped for coupling the sonotrode to a vibration source (such as an ultrasonic device). The anchor is disposed at the distal end of the device and comprises an anchor base and an anchoring sleeve that rests on a shoulder of the anchor base. The anchoring sleeve has a material that can be liquefied by mechanical vibrations, or is made thereof. A central region of the suture runs through the anchor base, and two end regions of the suture are fastened to the guide sleeve. The anchoring sleeve is clamped, or disposed such that it can be clamped, between the anchor base and an impact sleeve, or the sonotrode, or the guide sleeve. The device is particularly suited for anchoring sutures in bone tissue.
摘要:
An anchorage in tissue is produced by holding a vibrating element and a counter element against each other such that their contact faces are in contact with each other, wherein at least one of the contact faces includes a thermoplastic material which is liquefiable by mechanical vibration. While holding and then moving the two elements against each other, the vibrating element is vibrated and due to the vibration the thermoplastic material is liquefied between the contact faces, and due to the relative movement is made to flow from between the contact faces and to penetrate tissue located adjacent to outer edges of the contact faces. For liquefaction of the thermoplastic material and for displacing it from between the contact faces, no force needs to act on the tissue surface which is to be penetrated by the liquefied material.
摘要:
A light diffuser (10), in particular a light diffuser suitable for introducing diffuse light into a tissue, is produced by interpenetration of a diffusing material in the liquid state into a boundary layer (4) of a porous moulding material, creating a diffuser surface having a surface structure which essentially represents a negative of the pore structure of the moulding material and has recessed shapes produced by surface tension. The light diffuser (10) is produced, for example, by introducing a diffuser blank (1) composed of a material which can be liquefied by mechanical vibration into the moulding material and by exciting it at the same time with mechanical vibrations, so as to liquefy the liquefiable material at least where it is in contact with the moulding material, and by pressing it into the moulding material. Diffuser production in site is particularly advantageous for the photodynamic therapy of bone tissue (20), in that an implant designed as a diffuser blank (1) is implanted in the bone tissue (20), which acts as a porous moulding material, for example by means of ultra-sound, and then is connected to a light-conducting optical fibre in order to expose the bone tissue to light.
摘要:
A first and a second object (1 and 2) are joined with the aid of a joining element (8) comprising at least in the region of its distal and proximal end (8.1 and 8.2) a thermoplastic material. Two blind holes (5 and 6) facing each other are provided in the two objects (1 and 2) and the joining element (8) is positioned in the blind holes such that its distal and proximal ends (8.1) are in contact with the bottom faces of the blind holes and such that there is a gap (9) between the two objects (1 and 2). This assembly is then positioned between a support (3) and a sonotrode (4). The sonotrode (4) and the support (3) are forced towards each other, while the sonotrode (4) is vibrated, thereby liquefying at least part of the material having thermoplastic properties, there, where the joining element ends (8.1 and 8.2) are pressed against the bottom faces of the holes (5 and 6) and allowing the liquefied material to infiltrate into pores of the hole surfaces or unevennesses or openings provided in the hole surfaces, such anchoring the joining element ends (8.1 and 8.2) in the objects (1 and 2). For achieving suitably similar anchorage qualities at the two joining element ends (8.1 and 8.2), the distal end (8.1) of the joining element (8) has a smaller face area and comprises less thermoplastic material than the proximal end (8.2) of the joining element.
摘要:
The invention relates to an osseous implant (10) that is implanted in a predetermined cavity or cavity that has been specifically produced, parallel to an implant axis (1) without a significant degree of rotation. Said implant has cutting edges (14), which do not lie on a common plane with the implant axis and are oriented towards the distal end of the implant. In addition, the implant comprises surface areas (16) consisting of a material that can be liquefied by means of mechanical vibrations. The cutting edges (14) are dimensioned in such a way that once implanted, they cut into the cavity wall. To carry out the implantation, said implant is subjected to mechanical vibrations, causing the thermoplastic material to liquefy at least partially and be pressed into uneven areas and pores of the cavity wall, where it hardens to form a connection between the implant (10) and the cavity wall by means of a positive fit and/or a union of materials. The cutting edges (14) provide anchorage for the implant in the cavity wall, in a similar manner to a screw-type implant. As the implant requires no rotation, the implant can have a form that is neither cylindrical nor conical and can thus be stabilised against rotative stresses more effectively than a screw-type implant. The implant is also more stable with regard to tensile forces as a result of the anchorage by means of the liquefiable material and can, in particular, be subjected to stress immediately after implantation. The implant is, for example, a dental implant.
摘要:
In order to form positive connections with human or animal tissue parts, particularly bones, implants (7) are used that at least partially consist of a material that can be liquefied by means of mechanical energy. Particularly suitable materials of this type are thermoplastics (e.g. resorbable thermoplastics) or thixotropic materials. The implants (7) are brought into contact with the tissue part, are subjected to the action of ultrasonic energy and are simultaneously pressed against the tissue part. The liquefiable material then liquefies and is pressed into openings or surface asperities of the tissue part so that, once solidified, it is positively joined thereto. The implantation involves the use of an implantation device comprising a generator (2), an oscillating element and a resonator (6), whereby the generator (2) causes the oscillating element to mechanically oscillate, and the element transmits the oscillations to the resonator (6). The resonator (6) is used to press the implant (7) against the tissue part whereby causing oscillations to be transmitted to the implant (7). The implants (7) are, for example, pin-shaped or dowel-shaped and are used in lieu of screws for forming connections with bone tissue, whereby the bone tissue is optionally pre-bored for positioning the implant (7). By virtue of the fact that it is unnecessary to transmit any torsional forces to the implants (7), these implants can be provided with a design that is weaker, i.e. slimmer than that of known screws made of the same material, and they can be implanted more quickly.
摘要:
The invention relates to the promotion of tissue regeneration on wound surfaces (1), which, for example, should heal with other wound surfaces, heal over an implant, or heal to form tissue surfaces, whereby mechanical vibrations are introduced into said wound surfaces. A treatment instrument (2), coupled to a vibration source (electromechanical vibration converter), is used for the above, or an implant is subjected to vibrations during and/or after the positioning thereof in the tissue. Ultrasound vibrations are particularly suitable for the treatment. The vibrations have a mechanical and thermal effect in the region of the treated wound surface (1) and have a stimulating, traumatic, necrotic or cell-destroying effect according to intensity, whereupon biological elements which interfere with tissue regeneration are destroyed or denatured and the metabolism in the region of the wound surface is stimulated. The effect can also be mechanical, whereupon the tissue is lightly compressed or partly dislodged. The treatment can be carried out during or after the positioning of an implant thus the necrosis concerns in particular, undesired cells introduced to the wound surface with the implant, such as connective tissue cells, mucal cells or diseased cells which can interfere with the healing over of tissue and implant. The treatment instruments (2) or implants used for the treatment are embodied as vibrating bodies and are coupled or may be coupled to a vibrating drive or comprise a coupling surface on which a sonotrode may be placed. The above have surfaces for contact with energy guided transmitters.