Major Norwegian 19th-century mines had their own company physicians. Some of their reports and the mine sick-lists have been kept. From the Modum Blue Colour Works we have more than 80 such reports or sick-lists (each covering a four-week mining period) from 1823 to 1839. Of a total of 8,798 patients, 67 (0.8%) were diagnosed as suffering from odontalgia. The treatment was extraction or medication. Patients who underwent tooth extraction had fewer subsequent sick-days than those who were only given medication. Other registrated dental or oral disorders included dental abscess, caries, dental cancer with growth on the gums, thrush, dentition, dental fever and scorbutus.