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Background Third molar extraction is one of the most common oral surgical procedures globally. This study assessed patients’ knowledge of third molar extraction procedures. Methods A self-administered questionnaire was administered to patients (N=384) of the dental hospital at Imam Abdulrahman bin Faisal University in the eastern province. The questionnaire covered demographic data, knowledge of third molar extraction, and patients’ perception questions. SPSS Version 24 was used for statistical analysis. Chi-square and Fisher’s Exact test were used. P-values less than or equal to 0.05 were considered statistically significant . Results According to the demographical characteristics of the patient who received 3rd molar removal surgery. As per the history of the extraction, 45% had previous 3rd molar extraction experience, whereas 55% had no previous dental surgical experience. There was no significant difference between the groups with the knowledge about the extraction (p-0.187). Patients with no previous history were more aware of the correct time for 3rd molar extraction at 27% vs 19%, respectively (P=0.046*). Patients with a previous history of third molar extraction showed significant results of knowledge in terms of taking medication prior to 3rd molar surgical procedure. Conclusion The patient with previous experience with third molar extraction showed low misconceptions. However, further studies should consider increasing the knowledge and correcting the patients’ perceptions.