In the previous years, no articles were assessing the knowledge of interns and undergraduate students towards crown lengthening in Riyadh. The study aims to assess the knowledge in three dental colleges (KSU, REU, KSAU) targeting senior students and interns. A cross-sectional questionnaire-based study contains one question asking the participant if they had seen a case indicated for crown lengthening in their clinic and three clinical and radiographic photos, each one of them showing different possible management (crown coverage, Extraction, and crown lengthening than crown coverage). Different responses among participants. In general intern participants show a higher awareness regarding crown lengthening. There is a significant difference was noticed in one of the cases (the one indicated for crown lengthening) between male and female participants male students were more aware than female students (Chi-square=15.804, P value =0.000). Generally, most of the participant's answers to the questions were correct. And 57% of participants determine the need for crown lengthening before the discussion with the consultant. The results revealed that interns students were more aware than senior students of the need for clinical crown-lengthening procedures.