Abstract: The invention relates to a preparation for the photodynamic control of micro-organisms, said preparation being in a liquid or pasty form and containing a photosensitizer which comprises a dyestuff and produces singlet oxygen when irradiated by means of light. The micro-organisms can be marked by means of the dyestuff. The aim of the invention is to improve said preparation in order to enable an improved photodynamic control. To this end, the preparation contains an active ingredient for amplifying or weakening the oxidative action of the singulet oxygen by chemical manipulation of the dyestuff or the nanoenvironment thereof. In a particular form of embodiment, a rinsing solution is used before the irradiation.

Abstract: The invention relates to a microorganism reducing device, comprising a radiation device which is provided with a light source, a photosensitive substance which treats the area to be treated and is irradiated by said light source. The aim of said invention is to configure said device in such a way that it is possible to carry out an efficient and controllable treatment by means of operationally low-cost and easily handling apparatus. For this purpose, the inventive device comprises at least one applicator provided with a fibre-optic waveguide. In addition, the applicator and radiation device respectively comprise corresponding connector bodies coupling the applicator and radiation device in such a way that the light from the light source is emitted towards the treated area by means of the fibre-optic waveguide.

Abstract: The invention relates to a micro-organism reducing device, comprising a radiation device which is provided with a light source, a photosensitive substance which treats the area to be treated and is irradiated by said light source. The aim of said invention is to configure said device in such a way that it is possible to carry out an efficient and controllable treatment by means of operationally low-cost and easily handling apparatus. For this purpose, the inventive device comprises at least one applicator provided with a fiber-optic waveguide. In addition, said applicator and radiation device respectively comprise corresponding liaison bodies contacting one of them in such a way that the light from the light source is emitted towards the treated area by means of the fiber-optic waveguide.

Abstract: The invention relates to an apparatus for photodynamic therapy and/or for destroying or reducing microorganisms, comprising an irradiation unit having at least one light source, by means of which a photosensitizer applied to a wound area to be treated is activated by way of irradiation, further comprising a camera for recording images of the wound, which is disposed in the irradiation unit, and a positioning unit, by means of which the irradiation unit can be oriented with respect to the wound area. The invention further relates to a method for operating such an apparatus. On a display for the images is a grid with visual indicia distinguishing fields to be irradiated by means of the light sources.

Abstract: The invention relates to a preparation for the photodynamic control of micro-organisms, said preparation being in a liquid or pasty form and containing a photosensitiser which comprises a dyestuff and produces singlet oxygen when irradiated by means of light. The micro-organisms can be marked by means of the dyestuff. The aim of the invention is to improve said preparation in order to enable an improved photodynamic control. To this end, the preparation contains an active ingredient for amplifying or weakening the oxidative action of the singulet oxygen by chemical manipulation of the dyestuff or the nanoenvironment thereof. In a particular form of embodiment, a rinsing solution is used before the irradiation.

Abstract: The invention relates to a micro-organism reducing device, comprising a radiation device which is provided with a light source, a photosensitive substance which treats the area to be treated and is irradiated by said light source. The aim of said invention is to configure said device in such a way that it is possible to carry out an efficient and controllable treatment by means of operationally low-cost and easily handling apparatus. For this purpose, the inventive device comprises at least one applicator provided with a fibre-optic waveguide. In addition, said applicator and radiation device respectively comprise corresponding liaison bodies contacting one of them in such a way that the light from the light source is emitted towards the treated area by means of the fibre-optic waveguide.

Abstract: The invention relates to a preparation for the photodynamic control of micro-organisms, said preparation being in a liquid or pasty form and containing a photosensitiser which comprises a dyestuff and produces singlet oxygen when irradiated by means of light. The micro-organisms can be marked by means of the dyestuff. The aim of the invention is to improve said preparation in order to enable an improved photodynamic control. To this end, the preparation contains an active ingredient for amplifying or weakening the oxidative action of the singulet oxygen by chemical manipulation of the dyestuff or the nanoenvironment thereof. In a particular form of embodiment, a rinsing solution is used before the irradiation.

Abstract: A dental implant comprising an implant body which can be anchored in the jawbone and a superstructure portion which can be inserted at least partially in a recess of the implant body and which is fixed in place by a holding screw. The recess in the implant body is provided with a first contact surface and the superstructure portion is provided with an associated second contact surface for securing the superstructure against rotation relative to the implant body in a durable and functionally reliable manner such that play between the implant body and the superstructure is avoided. The superstructure portion is provided with at least one slot extending from its free end to the vicinity of the second contact surface and with a tapered portion disposed radially inwardly of the contact surfaces.

Abstract: A dental implant including a post which can be anchored in the jawbone of a dental patient and a replacement tooth head fastenable to said post. The post has at its crown end a recess for mounting a replacement tooth. The outside surface of the post is stepped down in at least two, and preferably three or four, steps to an apical root end opposite said crown end. At least one of the steps carries an external screw thread, and of two adjacent steps, the step closer to the apical root end has a thread crest diameter which is not larger than the base diameter of the adjacent step situated closer to the crown end of the implant.

Abstract: According to a process for producing a bone replacement material, natural bones are used as raw material, the soft parts of the bones are removed, as well as any residual organic substances, and the remaining osseous substance is finally sintered at temperatures between 1100 degrees and 1500 degrees Celcius. In order to simplify such a process and to ensure a more gentle processing of the inorganic bone matrix, the bones are dried at an increased temperature, maximum 550 degrees Celcius, with a reduced air supply or in a reducing atmosphere, then the temperature of the bones is increased during the following step up to 750 degrees to 800 degrees Celcius, with an increased air supply, and finally the bones are sintered.