Exfoliative cytology allows important information to be obtained about the structure and function of individual sections of tissue. Use of this particular method of examination is characterized by simplicity and freedom from strain on the subject being tested. In addition, the method yields clear and comprehensive results. Smears obtained from different regions of the oral cavities of subjects with clinically healthy oral mucous membrans and intact teeth were carefully analyzed. Also examined by clinical methods as well as by exfoliative cytology was the healthy gingiva, with parodontopathia inflammata superficialis and parodontopathia inflammata profunda serving as reference groups.