The Department of Periodontics had conducted the Eleventh edition of Perio-interaction at Saveetha dental college on 24th January 2020. The CDE programme was attended by all the post graduates and faculty from the department of Periodontics of various dental colleges in Tamil Nadu. There were five guest lectures on the various current and controversial topics in periodontics like tissue adhesives, guided implant surgery, digital smile designing, newer generation regenerative materials and ozone therapy. There were around 100 participants for the CDE programme and around 25 post graduate students presented E- poster on the various topics. The programme was well appreciated by the participants and five best posters were selected and the students were awarded during the valedictory function.