Abstract: A dental composition comprises a fluorescent whitening agent. The fluorescent whitening agent is most preferably 4,4?-bis(2-sulfostryryl)bipheny) or a salt or other soluble derivative thereof, eg the disordium salt. The composition may also comprise an additional tooth whitening agent. Methods of whitening the teeth are also described.

Abstract: A method of controlling an X-ray system and a cabinet for an X-ray system. The method comprises viewing a first virtual X-ray image of an object, manipulating the first image to best show an area of interest, and generating a second image in real time corresponding to the area of interest. The cabinet comprises an inner housing having an open mouth and being fully insertable with a clearance in an outer housing having an open mouth, the inner and outer housings being attachable to secure and space the housings in a predetermined relationship. Lead shielding comprises a substantially complete intermediate layer extending between the inner and outer housings and the open mouth is provided with a lead lined closure.

Abstract: A cabinet for an x-ray system comprising an inner housing having an open mouth and being fully insertable with a clearance in an outer ousing having an open mouth, the inner and outer housings being attachable to secure and space the housings in a predetermined relationship. Lead shielding comprises a substantially complete intermediate layer extending between the inner and outer housings and the open mouth is provided with a lead lined closure.