Periodontics has experienced several important conceptual changes in the last few decades. As such, it is important to have a periodontics curriculum built upon the expertise of specialists in that discipline and reflecting those changes. The main goal of this study was to attain a consensus, through the use of the Delphi technique, on the topics that should be included in a periodontics curriculum for undergraduate dental students. A sample of periodontics lecturers from nine dental schools in two Brazilian cities was used, and a Delphi technique approach was followed to investigate sample member perceptions on the subject. Participants received four postal mail questionnaires asking them to rate and rerate eighty-nine topics for possible inclusion in the curriculum. A descriptive analysis was conducted, and topic frequencies were calculated. Topics rated as highly important for inclusion were the following: health, ailment, prevention, etiology, epidemiology, diagnosis, and treatment. The Delphi technique approach proved successful in involving periodontics lecturers in the design of a periodontics curriculum for undergraduate dental students.