Orthodontics Orthodontics SDLE MCQ | Part 1 Facebook X LinkedIn Messenger Messenger WhatsApp Telegram Print Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 Orthodontics Orthodontics SDLE MCQ | Part 1 DentQuiz SDLE Mock Exam Instruction To mark a question and come back to it later, click the Bookmark icon. For the best experience, use a computer and switch to full screen button (from the top left corner). You can review and change your answers before clicking Next. Explanations will appear after each question to help you understand the correct answer. Your results will be shown right after you finish the exam. This is a fresh attempt — previous answers or bookmarks won't be saved. The source of the questions and answers is recent Rafee’ Al-Maqam files. Special thanks to رفيع المقام. Answers are based on colleagues best efforts and may not be 100% accurate. If you believe an answer is incorrect, please click the Report button to let us know. Please fill in your details to continue NameEmailPhone Number 1 / 50 Category: Orthodontics 1) A 5-year-old patient has a mandibular mesial shift. What is the best intervention? Surgery Wait until mixed dentition No treatment Habit-breaking appliance Waiting until mixed dentition is often the best approach for young patients. 2 / 50 Category: Orthodontics 2) What causes mesial resorption of bone and distal deposits? Orthodontic extrusion Trauma Physiologic mesial migration of a tooth Winding of the diastema Physiologic mesial migration of a tooth can cause these bone changes. 3 / 50 Category: Orthodontics 3) A 22-year-old patient has a reverse anterior crossbite of 9 mm. What is the best treatment? Orthodontic camouflage Extraction No treatment Orthognathic surgery Orthognathic surgery is needed for severe reverse crossbite. 4 / 50 Category: Orthodontics 4) What is the most essential X-ray for diagnosing facial asymmetry? CT OPG Cephalometric Posterior anterior CT scans provide the most detailed information for diagnosing facial asymmetry. 5 / 50 Category: Orthodontics 5) A patient is missing tooth #6, and teeth #7 and #5 are tilted. What is the best treatment to replace tooth #6? Extract tooth #7 and place a bridge Upright tooth #7 and replace #6 with an implant Leave the space as it is Use a removable partial denture Uprighting the tilted teeth and placing an implant is the ideal treatment to restore function and aesthetics. 6 / 50 Category: Orthodontics 6) A 32-year-old patient with a prognathic mandible has 6 mm of tooth show and is concerned about aesthetics. What is the best treatment? Mandibular expansion Orthognathic surgery Maxillary expansion Camouflage treatment Orthognathic surgery is the best option for significant skeletal discrepancies. 7 / 50 Category: Orthodontics 7) A 14-year-old patient has a Class I malocclusion with a single tooth crossbite. What is the best treatment? Extraction No treatment Fixed orthodontic appliance Removable appliance with finger spring A removable appliance with a finger spring is effective for correcting single tooth crossbite. 8 / 50 Category: Orthodontics 8) An orthodontic patient is in pain. What medication is most appropriate? Ibuprofen Paracetamol Aspirin Naproxen Paracetamol is the safest option for pain relief in orthodontic patients. 9 / 50 Category: Orthodontics 9) A patient complains of their appearance. Cephalometric analysis shows ANB = 6 and upper incisors angle to SN = 108. What is the classification? Class II division 1 Normal occlusion Class III Class II division 2 ANB = 6 and increased incisor angle indicate Class II division 1. 10 / 50 Category: Orthodontics 10) A patient has increased lower facial height, abnormal ramus growth, open bite, and proclined incisors. What is the most likely cause? Tongue thrust habit Genetic factors Mouth breathing Coronal syndrome Mouth breathing is a common cause of increased lower facial height and open bite. 11 / 50 Category: Orthodontics 11) A 5-year-old child has lost all anterior primary teeth. What is the most appropriate dental appliance? Removable partial denture No treatment needed Space maintainer Functional appliance A space maintainer is used to preserve space for permanent teeth. 12 / 50 Category: Orthodontics 12) After space analysis, a patient has 26 mm of space but requires 25 mm. What does this indicate? Spacing No treatment needed Crowding Normal The space is sufficient, indicating a normal situation. 13 / 50 Category: Orthodontics 13) A patient complains of diffuse redness and pain in the left buccal mucosa 6 weeks after orthodontic installation. What is the most likely cause? Allergy to NiTi wire Infection Wire trauma Extended wire Allergy to NiTi wire can cause mucosal irritation and redness. 14 / 50 Category: Orthodontics 14) A 5-year-old patient has a prognathic mandible, open bite, crossbite, and maxillary deficiency. What should be treated first? Mandibular prognathism Crossbite Maxillary deficiency Open bite Maxillary deficiency should be addressed first to correct the skeletal discrepancy. 15 / 50 Category: Orthodontics 15) What is the most common malocclusion? Class I aligned teeth Class III Class I crowding Class II Class I crowding is the most common type of malocclusion. 16 / 50 Category: Orthodontics 16) A patient has a posterior crossbite, open bite, and thumb-sucking habit. What is the best appliance? Hawley retainer Facemask Quad helix Palatal crib Quad helix is effective for correcting posterior crossbite and open bite. 17 / 50 Category: Orthodontics 17) A patient complains about their denture. What is the most likely cause based on the picture? Broken denture Poor fit Midline shift Increased vertical dimension Midline shift is a common issue with poorly fitting dentures. 18 / 50 Category: Orthodontics 18) A patient with fixed orthodontic appliances complains of pain posterior to tooth #17. What is the most likely cause? Infection Broken bracket Extended wire Normal adjustment pain An extended wire is a common cause of irritation and pain in orthodontic patients. 19 / 50 Category: Orthodontics 19) How often should a rapid expansion and Quad helix appliance be activated? Once weekly Once daily Twice weekly Once monthly Rapid expansion appliances are typically activated once daily. 20 / 50 Category: Orthodontics 20) A 4-year-old patient has a mandibular shift when closing the mouth. What is the best management? No treatment Wait for permanent teeth to erupt Remove interference from canines Use a functional appliance Removing interference from canines can correct the mandibular shift. 21 / 50 Category: Orthodontics 21) A patient with Class II malocclusion has a parent concerned about mandibular deficiency. What measurement is most useful for diagnosis? SN-MP SNA SNB SN-OP SNB is used to assess the position of the mandible. 22 / 50 Category: Orthodontics 22) A patient has normal occlusion except for one tooth that needs retraction. What is the best appliance? Finger spring Quad helix Hawley retainer with labial bow Facemask A finger spring is effective for single tooth retraction. 23 / 50 Category: Orthodontics 23) A mother is concerned about her 10-year-old child’s missing teeth. Which tooth is most likely missing? Upper first molar Lower first molar Upper lateral incisor Lower lateral incisor Upper lateral incisors are commonly missing in children. 24 / 50 Category: Orthodontics 24) A patient complains of a broken tube and irritating wire, with an appointment scheduled in 2 weeks. What should be done? Tell the patient to wait Remove the wire Re-bond the tube Cut the excess wire Cutting the excess wire is the most appropriate action to relieve irritation until the next appointment. 25 / 50 Category: Orthodontics 25) A patient has a fixed orthodontic appliance with a diastema and low frenum. What is the next step? Wait for natural closure Frenectomy Continue orthodontic treatment Remove the appliance Frenectomy is often necessary to address a low frenum causing diastema. 26 / 50 Category: Orthodontics 26) A patient with Class II malocclusion has excessive vertical growth and incompetent lips. What is the most likely cause? Soft tissue imbalance Tooth-jaw discrepancy Genetic factors Skeletal discrepancy Skeletal discrepancy is often the cause of excessive vertical growth and incompetent lips. 27 / 50 Category: Orthodontics 27) What type of primary occlusion ends with Class III? Mesial step Flush Distal step Open bite Mesial step occlusion is associated with Class III malocclusion. 28 / 50 Category: Orthodontics 28) A patient has an overjet, inverted lower lip, and deep labiomental fold. Cephalometric analysis shows normal SNA and decreased SNB. What is the diagnosis? Lower deficiency Microdontia Normal occlusion Lower deficiency and upper prognathism The patient has lower deficiency and upper prognathism. 29 / 50 Category: Orthodontics 29) A patient has a unilateral crossbite caused by unilateral maxillary constriction. What is the best treatment? Surgery Bilateral expansion Unilateral expansion No treatment Unilateral expansion is the treatment for unilateral maxillary constriction. 30 / 50 Category: Orthodontics 30) A patient has a minor tongue injury due to a palatal crib. What is the best course of action? No treatment needed Reassure the parent Remove the palatal crib Reassure the child Reassuring the child is the first step for minor injuries. 31 / 50 Category: Orthodontics 31) A patient with multiple caries, heavy calculus, and severely destructed teeth seeks orthodontic treatment. What should be done after ortho? Remove caries and restorations Permanent crowns Root canal therapy Scaling and root planing Permanent crowns are necessary to restore the severely destructed teeth after orthodontic treatment. 32 / 50 Category: Orthodontics 32) An orthodontic patient has an elongated wire causing multiple irritations. What should be done? Wait for the next appointment Remove the appliance Cut the wire Apply wax Cutting the wire is the most effective way to relieve irritation. 33 / 50 Category: Orthodontics 33) A 15-year-old patient has Class III malocclusion with a reverse overjet of 10 mm. When should treatment begin? No treatment needed Immediately In 3 years In 6 years Immediate treatment is recommended for significant reverse overjet. 34 / 50 Category: Orthodontics 34) An 11-year-old patient needs expansion. What is the recommended activation rate? Rapid 0.5 mm weekly Slow 0.25 mm weekly Rapid 0.5 mm daily Slow 0.25 mm daily Rapid expansion at 0.5 mm daily is commonly recommended for young patients. 35 / 50 Category: Orthodontics 35) Where is the center of rotation of a single tooth? Middle of the tooth and crown Middle of the tooth and apical Apex of the tooth Furcation The center of rotation is typically located between the middle of the tooth and the apical region. 36 / 50 Category: Orthodontics 36) A patient has a severe Class III malocclusion with a concave profile. What is the best treatment? Surgical maxillary expansion Mandibular setback with maxillary advancement No treatment Orthodontic camouflage Mandibular setback with maxillary advancement corrects the concave profile. 37 / 50 Category: Orthodontics 37) What appliance is used to retract anterior teeth when space is available? Hawley with labial bow Twin block Facemask Quad helix A Hawley appliance with a labial bow is effective for retracting anterior teeth. 38 / 50 Category: Orthodontics 38) A patient complains of a deep bite and excessive vertical growth of the maxilla. What is the most likely diagnosis? Skeletal Class II Normal growth Skeletal Class III Vertical excess of the maxilla Skeletal Class II is characterized by excessive vertical growth of the maxilla. 39 / 50 Category: Orthodontics 39) What is the definition of pseudo Class III malocclusion? A condition where the maxilla is underdeveloped A condition where the teeth are perfectly aligned A condition where the mandible shifts forward, mimicking Class III malocclusion A condition where the mandible is retruded Pseudo Class III malocclusion is characterized by a forward shift of the mandible, creating the appearance of a Class III malocclusion without true skeletal discrepancy. 40 / 50 Category: Orthodontics 40) A 14-year-old patient has unerupted maxillary canines and anterior crowding. What is the best treatment? Expansion Extraction Nonextraction Distalization Expansion is often the best option for creating space in young patients. 41 / 50 Category: Orthodontics 41) A 25-year-old patient has a retained primary canine and an impacted permanent canine with poor prognosis. What is the best management? Extraction and space closure Crown for the primary canine No treatment Extraction of both canines and implant If the primary canine has a good prognosis, it is best to leave it in place. 42 / 50 Category: Orthodontics 42) What does an increased ANB angle indicate? Class II Class I Class III Normal occlusion An increased ANB angle is indicative of Class II malocclusion. 43 / 50 Category: Orthodontics 43) A 7-year-old patient has an anterior open bite, tongue thrusting, and occasional thumb sucking. What is the most likely cause of the open bite? Swallowing with tongue thrust Tongue forward position Thumb sucking Genetic factors Thumb sucking is a common cause of anterior open bite in children. 44 / 50 Category: Orthodontics 44) A patient has a long wire causing irritation, with an appointment in 2 weeks. What should be done? Remove the wire Wait for the appointment Bond the buccal tube Cut the wire Cutting the wire is the best immediate solution to relieve irritation. 45 / 50 Category: Orthodontics 45) A patient has pseudo Class III malocclusion with a mandibular shift to the anterior. What is the best management? No treatment Palate expansion Facemask Smoothing with modification of cusps Smoothing the cusps can help reduce the mandibular shift in pseudo Class III cases. 46 / 50 Category: Orthodontics 46) A patient has a unilateral crossbite due to a functional shift of the mandible. What is the best treatment? No treatment Treatment of unilateral crossbite on the affected side Bilateral maxillary expansion Treatment of unilateral crossbite on the non-affected side Bilateral maxillary expansion is the most effective treatment for functional shifts. 47 / 50 Category: Orthodontics 47) A patient has a Class III molar relationship. What is the best camouflage extraction? Extract upper second premolar and lower first premolar No extraction Extract upper first premolar and lower first premolar Extract lower first premolar Extracting upper second premolar and lower first premolar is a common camouflage strategy for Class III malocclusion. 48 / 50 Category: Orthodontics 48) What is the Frankfort horizontal plane? Nasion to ANS ANS to PNS Porion to orbitale Gonion to menton The Frankfort horizontal plane runs from the porion to the orbitale. 49 / 50 Category: Orthodontics 49) A 14-year-old patient has crowding in the upper and lower arches and a missing upper canine. What is the best treatment option? Extraction Distalization Expansion Nonextraction Expansion is often the preferred treatment for crowding and missing teeth in young patients. 50 / 50 Category: Orthodontics 50) What is the definition of Class I malocclusion? Malaligned teeth Overjet Overbite Perfectly aligned teeth Class I malocclusion involves malaligned teeth with a normal molar relationship. Your score is The average score is 48% Facebook Twitter 0% Restart quiz Please rate this exam and leave a comment with any notes or suggestions. Anonymous feedback Thank you for your feedback Send feedback Facebook X LinkedIn Messenger Messenger WhatsApp Telegram Print Share Facebook X LinkedIn Pinterest Reddit Messenger Messenger WhatsApp Telegram Share via Email Print
