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[Dentistry: debit and credit; the 1979 rectorial address in Bern].

The importance of the elimination of pain and its refinement by local anesthesia, analgesia and general anesthesia is shown in dental treatment. Preventive measures have gained weight: Teaching patients about plaque and sugar, the importance of fluorides, oral hygiene in school dentistry, changes in nutrition. Economic aspects are shown in the divergence of cost between prevention and therapy. Implants as a last resource are mentioned. Finally, in conclusion, it is emphasized that prevention must rank first in proper dental education into which postgraduate education in a future postgraduate clinic should be integrated.