초록 ▼

Method and device for the recognition of caries, plaque, concretions or bacterial infections on teeth, whereby with the aid of a light source (1) an excitation radiation (9) is generated which is directed at a tooth (4) to be investigated and there brings about a fluorescence radiation (10). The flu

Method and device for the recognition of caries, plaque, concretions or bacterial infections on teeth, whereby with the aid of a light source (1) an excitation radiation (9) is generated which is directed at a tooth (4) to be investigated and there brings about a fluorescence radiation (10). The fluorescence radiation is detected and evaluated with a detection device (8). A spectral filter is arranged before the detection device (8) which restricts the fluorescence radiation detected and evaluated by the detection device (8) to wavelengths greater than ca. 800 nm, in order to make possible an improved detection of carious tooth regions. Advantageously, the irradiation of the tooth to be investigated is effected with a relatively long wavelength excitation radiation (9), the wavelength of which may be for example ca. 780 nm.

대표청구항 ▼

[ What is claimed is:] [6.] Device for the recognition of caries, plaque, concretions or bacterial infection on teeth, having a light source (1) for the generation of an excitation radiation (9), which is to be directed at a tooth (4) to be investigated and which brings about a fluorescence radiatio

[ What is claimed is:] [6.] Device for the recognition of caries, plaque, concretions or bacterial infection on teeth, having a light source (1) for the generation of an excitation radiation (9), which is to be directed at a tooth (4) to be investigated and which brings about a fluorescence radiation (10) at the tooth (4), having a detection device (8) for the detection of the fluorescence radiation (10) of the tooth (4), and having spectral filter means (7) arranged before the detection device (8), racterized in that, spectral filter means (7) are so configured to facilitate the through-passage of fluorescence radiation (10) having a wavelength greater than about 800 nm and including a light conductor fiber (13) for the transmission of the excitation radiation (9), the end of which towards the tooth is chamfered and made reflective, so that the excitation radiation (9) emerges laterally from the light conductor fiber (13).