Statistical data on many aspects of dental and allied dental personnel supply, distribution, characteristics, and education and on certain other aspects of dental services are presented and discussed. The data on dentist supply show the national trend in the supply of active dentists since 1950 and the concurrent changes in dentist-to-population ratios, as well as increases in the number of dentists in each specialty and State and region. The geographic maldistribution of dentists is examined. Data are presented on dental practice characteristics, including type of dental employment, employment of dental auxiliary personnel, number of patient visits, and income. Trends in the number of dental schools, student enrollment, and graduates are discussed and documented. Data are presented on the supply of allied dental personnel, including dental hygienists, dental assistants, and dental laboratory technicians, and on the availability of training programs for these types of personnel. The utilization of dental services by the public is explored in terms of the percent of persons who have visited a dentist within a year, the average number of dental visits, and the types of services received. Trend data are presented on national health expenditures and dental expenditures from 1950 through 1970. Insurance coverage for dental care is discussed. Data are presented on the oral health status of the U.S. population, as indicated by the number of decayed, missing, and filled teeth; the extent of periodontal disease; and the prevalence of edentulous arches. A statistical summary of the 1975 flouridation census is also included. (SC)