The purpose of this study was to examine the relationship of the self-rated peridontal health status of dental patients and the type of their treatment(implant, orthodontic treatment and general treatment) to the quality of life(happiness index), to investigate influential factors for oral health, and ultimately to provide some information on the development of oral health care programs geared toward boosting the happiness index. The subjects in this study were the patients who visited dental hospitals and clinics in Busan and South Gyeongsang Province. As for relationship between the field of treatment and the happiness index, the patients who received orthodontic treatment scored higher in both each itemand all the five items, and the patients who received implant treatment scored lower. Regarding links between self-rated periodontal health status and the happiness index, the patients who had no oral symptoms scored higher in both each item and all the five items, and the respondents whose self-rated health status and self-rated oral health status were both very good scored higher in the happiness index. The preparation of oral health programs that aim to improve the self-rated oral health of patients who visit dental hospitals or clinics is required.