Abstract: Eyeglasses have at least one partially transparent screen as an eyeglass lens and multiple optical recording apparatuses for recording images in a field of vision of a user of the eyeglasses. The recorded images can be processed further by a processing apparatus, in such a manner that a position of the eyeglasses relative to a patient can be determined, and, based on this position, a position of a planned implant in the jaw of a patient can be represented on the at least one partially transparent screen in the form of a marking.

Abstract: A method for evaluation of a chewing function test includes the following steps. Spit-out chewed model food with chewing function pieces is made available. The chewed model food is collected in a sieve, and subsequently rinsing of the chewed model food is carried out, so as to obtain saliva-free unchewed chewing function pieces or saliva-free particles of the chewing function pieces, which particles include chewed chewing function pieces. Afterward, separation of the particles takes place. After a determination of the total number of particles, classification of the total number of particles takes place using predetermined standard values, which classification includes a differentiation with regard to unchewed components of the model food, partly chewed components without split-off particles of the model food, and split-off particles.

Abstract: Eyeglasses have at least one partially transparent screen as an eyeglass lens and multiple optical recording apparatuses for recording images in a field of vision of a user of the eyeglasses. The recorded images can be processed further by a processing apparatus, in such a manner that a position of the eyeglasses relative to a patient can be determined, and, based on this position, a position of a planned implant in the jaw of a patient can be represented on the at least one partially transparent screen in the form of a marking.

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 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.