The mass attack of toothache!. These pictures were taken in the conservation room at the Guy's Hospital Dental School, London, one of the spearheads in the attack on the Demon toothache. Over 100 patients can be attended to at one time by dental students in this room, which is devoted to the preservation of teeth and not to extractions. Very little is charged for attention although gold and silver fillings are exclusively used. Photo shows, a close inspection of a tooth at the Guy's Hospital Dental School. Rote the rubber dam, which exposes to view only the tooth, which is receiving attention and prevents debris from falling into the patient's mouth. 5 February 1938