For being eligible for PGIMER MDS, you should hold a valid BDS degree from a University/Institute recognised by the Dental Council of India. Now PGIMER MDS exam is held twice a year. Once in November and once in June and so it is important to have completed your 1 year rotational internship by the said period according to the session you are appearing for the exam.You should have a permanent/provisional registration certificate issued by the DCI.