Patent ID: 6860879

Claim:
A light application unit for photodynamic diagnosis and for a photodynamic therapy of non-malignant diseases of a parodontium and of a tooth of a living being, comprising: a light source for generating a light with a wavelength spectrum lying at least in the visible region; a focusing unit for said light; at least one element arrangeable in a light beam path of said light generated by said light source, said at least one element altering a spectral property of said light; and two wave guides for transmitting said light emitted from said light source to a distal emitting end of said two wave guides, said two wave guides positioned adjacent to each other, wherein an emitting end face of one of said two wave guides projects in a distal region beyond an emitting end face of the other of said two wave guides, and wherein one of said wave guides is arranged to be alternately axially extendable and retractable relative to the other wave guide, said two wave guides are configured rigidly in at least a distal region for handling, and said two wave guides being curved in a distal end section thereof.