The invention relates to a dental light-curing device (10) provided for dental material to be cured, which comprises a handpiece (20) and a base station, wherein the handpiece (20) has a light source, in particular having a plurality of LED chips (42, 44, 46 and 48), which—with respect to the optical axis—are arranged one next to the other, a control device (22) for the light source and at least one sensor, which is arranged adjacent to the light source, wherein—again with respect to the optical axis—a light guiding device, in particular a light guide rod (12), extends in front of the light source, which light guide rod (12) has a passband for wavelengths which comprises at least blue visible light and, in particular, also green visible light and UV light, and having a selecting device for control programs of the control device (22), in particular a push button on the handpiece (20). The invention is characterized by comprising a control device (22) and also a “pre-curing” control program, which can be selected by means of the selecting device, and in which the light-curing device can be activated with a secondary wavelength range, which is different from a light-curing main wavelength range, and the light radiation of which is outside the sensitivity range of the dental material to be cured. The control device (22) automatically switches on the light source in the main wavelength range in order to pre-cure excess glue (28) in dental restorations, in particular adhesive crowns or adhesive bridges, if at least one sensor detects light reflected from a tooth surface in the secondary wavelength range.
