The VDOS mock theory exam consists of 100 four-part multiple-choice questions, which may be accompanied by images (clinical photographs, radiographs, etc.). Participants are allowed 2.5 hours to complete the exam, which is designed to assess their knowledge of the scientific literature relevant to dentistry and oral surgery (focus on horses). The correct answers are revealed following completion of the exam during a 2.5-hour discussion. Only the participants will know their exam performance.