Objectives: The purpose of this research was to investigate OCPD tendencies and its possible conneciton with the quality of oral health among biomedical students. Materials and methods: 178 students of medicine, dental medicine and pharmacy, from the 1st to the 6th year, of the Faculty of Medicine in Split participated in the study. The survey was made in the form of a Google forms and was completely anonymus. The general data of the students wasre collected in the firstfirst part of the questionnare. The HU-DBI dental behaviour questionnaire was used in the second part and the FFOCI-SF -five factor obsessivecompulsive questionnaire-short form, in the third part. Results were obtained from the total collection of the HU-DBI questionnare results and total collection of FFOCI-SF results and their mutual comparison. Results: The average age of the subjects was 23 ± 1,9. Most of them consume alcohol, although they don not consume tobaco products. The average total score of HU-DBI questionnaire is 6.0 (5.0-7.0). Most respondants agreed they check on their teeth after brushing and that they brush them carefully. Only one person out of 178 students uses a children's toothbrush. The mean score of FFOCI-SF questionnaire was 143.0(133.0-156-0). „Thoughtfull consideration“ and „perfectionism“ were dimensions with highest scores. Coclusion: Comparing the total results of the HU-DBI questionnaire and the total results of the FFOCI-SF questionnaire, statistically positive and significant link was found between students with a greater tendency to OCPD and better adherence to oral hygiene, while the group with a lower tendency to OCPD had lower HU-DBI scores.