Abstract: A laser handpiece, which has an outer guide sleeve in which a light guide is contained, is provided with a releasable clamping device. By the rotation of a rotary ring on the guide sleeve, the clamping device can be released and an advancing of the light guide, either manually or automatically, can be guaranteed.

Abstract: A dental laser treatment instrument comprising a handpiece that is connected to a supply tube for supplying laser radiation and a treatment fluid, and has a long extraction element on the front end thereof, for emitting the laser radiation. The extraction element has a long optical fiber and a cylindrical or sleeve-type holding element which surrounds the optical fiber in a region facing the front end of the fiber, at a distance from said fiber, in order to form a fluid channel. The fluid channel is connected to a supply line extending through the handpiece. According to the invention, the sleeve-type holding element projects past the front optical output end of the optical fiber.

Abstract: The invention relates to a device for the diagnosis of the state of health of tooth tissue, having a first light source (1) for the generation of an excitation radiation (2), which is to be directed via a light conductor arrangement (4) onto a tooth tissue region (6) to be investigated and which excites a fluorescence radiation (7) at the tooth tissue region (6), and having detection means (4b, 10) for the detection of the fluorescence radiation (7). In order on the one hand to improve ease of use for the treating dentist and on the other hand to be able to reliably recognize a diseased tooth region, whereby at the same time the patient should not be subjected to unnecessary ablation processes or the removal of healthy tooth substance, the diagnosis device has a second light source (11) for the generation of a treatment laser radiation, which is likewise to be directed onto the tooth tissue region (6) to be investigated, via a light conductor arrangement.

Abstract: In the case of a laser instrument (1) with a laser-light guiding device (3) feeding the laser light, an oblong outcoupling element (15), the longitudinal direction of which is arranged at an angle (W4) in relation to the direction with which the laser light emerges from the guiding device (3), and with a laser-light deflecting device (26) which introduces the laser light emerging from the guiding device (3) into the outcoupling element (15), the deflecting device (26) is integrally moulded onto the outcoupling element (15).