The extent to which dentists influence the outcomes of dental care, compared to the effects of dental technology or patient variation, has not been well studied. A review of the literature on the personality and value structures of dentists and dental students reveals general trends involving preferences of concrete, utilitarian, unambiguous, and conventional situations that are classified and judged in terms of their potential for dentists' power and control and for relationships of helping others but avoiding mutual dependency. These findings are summarized in a hypothesis that dentists seek situations where they can exercise control and establish paternalistic relationships with others. The evidence about career satisfaction of dentists is difficult to interpret. Between 20 percent and 50 percent of dentists report that they would not choose to enter the profession again if given a chance. Yet the number leaving the profession voluntarily is less than the number of career changers in the general population by a factor of about 1 to 15. Career satisfaction of practitioners can be partially predicted from an understanding of dentists' personality and values. Factors such as uncooperative patients, incompetent staff, and government and insurance intrusions are major dissatisfiers; they threaten dentists' core need for control. Factors such as quality of work, which is under the control of dentists, are major satisfiers. The personalities and values of dentists and the expression of these in professional norms may function to limit our understanding of dentistry. Based on this analysis, eight predictions are offered about the profession.