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 15-year-old patient has Class III malocclusion with a reverse overjet of 10 mm. When should treatment begin? No treatment needed Immediately In 6 years In 3 years Immediate treatment is recommended for significant reverse overjet. 2 / 50 Category: Orthodontics 2) What does an increased ANB angle indicate? Class I Class II Class III Normal occlusion An increased ANB angle is indicative of Class II malocclusion. 3 / 50 Category: Orthodontics 3) A mother is concerned about her 10-year-old child’s missing teeth. Which tooth is most likely missing? Lower first molar Upper lateral incisor Lower lateral incisor Upper first molar Upper lateral incisors are commonly missing in children. 4 / 50 Category: Orthodontics 4) A patient has a posterior crossbite, open bite, and thumb-sucking habit. What is the best appliance? Quad helix Palatal crib Hawley retainer Facemask Quad helix is effective for correcting posterior crossbite and open bite. 5 / 50 Category: Orthodontics 5) A 5-year-old patient has a mandibular mesial shift. What is the best intervention? No treatment Surgery Habit-breaking appliance Wait until mixed dentition Waiting until mixed dentition is often the best approach for young patients. 6 / 50 Category: Orthodontics 6) What is the most essential X-ray for diagnosing facial asymmetry? Cephalometric OPG Posterior anterior CT CT scans provide the most detailed information for diagnosing facial asymmetry. 7 / 50 Category: Orthodontics 7) 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? Genetic factors Thumb sucking Tongue forward position Swallowing with tongue thrust Thumb sucking is a common cause of anterior open bite in children. 8 / 50 Category: Orthodontics 8) How often should a rapid expansion and Quad helix appliance be activated? Twice weekly Once monthly Once weekly Once daily Rapid expansion appliances are typically activated once daily. 9 / 50 Category: Orthodontics 9) A 5-year-old patient has a prognathic mandible, open bite, crossbite, and maxillary deficiency. What should be treated first? Open bite Maxillary deficiency Mandibular prognathism Crossbite Maxillary deficiency should be addressed first to correct the skeletal discrepancy. 10 / 50 Category: Orthodontics 10) An orthodontic patient is in pain. What medication is most appropriate? Paracetamol Naproxen Ibuprofen Aspirin Paracetamol is the safest option for pain relief in orthodontic patients. 11 / 50 Category: Orthodontics 11) A patient complains of a broken tube and irritating wire, with an appointment scheduled in 2 weeks. What should be done? Re-bond the tube Tell the patient to wait Cut the excess wire Remove the wire Cutting the excess wire is the most appropriate action to relieve irritation until the next appointment. 12 / 50 Category: Orthodontics 12) 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. 13 / 50 Category: Orthodontics 13) A patient has normal occlusion except for one tooth that needs retraction. What is the best appliance? Hawley retainer with labial bow Finger spring Quad helix Facemask A finger spring is effective for single tooth retraction. 14 / 50 Category: Orthodontics 14) A 4-year-old patient has a mandibular shift when closing the mouth. What is the best management? Wait for permanent teeth to erupt Remove interference from canines No treatment Use a functional appliance Removing interference from canines can correct the mandibular shift. 15 / 50 Category: Orthodontics 15) 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. 16 / 50 Category: Orthodontics 16) A patient complains of their appearance. Cephalometric analysis shows ANB = 6 and upper incisors angle to SN = 108. What is the classification? Normal occlusion Class II division 2 Class II division 1 Class III ANB = 6 and increased incisor angle indicate Class II division 1. 17 / 50 Category: Orthodontics 17) A 5-year-old child has lost all anterior primary teeth. What is the most appropriate dental appliance? Removable partial denture Space maintainer Functional appliance No treatment needed A space maintainer is used to preserve space for permanent teeth. 18 / 50 Category: Orthodontics 18) What is the Frankfort horizontal plane? Gonion to menton Porion to orbitale ANS to PNS Nasion to ANS The Frankfort horizontal plane runs from the porion to the orbitale. 19 / 50 Category: Orthodontics 19) 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. 20 / 50 Category: Orthodontics 20) What is the definition of Class I malocclusion? Overbite Malaligned teeth Perfectly aligned teeth Overjet Class I malocclusion involves malaligned teeth with a normal molar relationship. 21 / 50 Category: Orthodontics 21) A patient with multiple caries, heavy calculus, and severely destructed teeth seeks orthodontic treatment. What should be done after ortho? Scaling and root planing Permanent crowns Root canal therapy Remove caries and restorations Permanent crowns are necessary to restore the severely destructed teeth after orthodontic treatment. 22 / 50 Category: Orthodontics 22) A patient has a severe Class III malocclusion with a concave profile. What is the best treatment? Mandibular setback with maxillary advancement No treatment Surgical maxillary expansion Orthodontic camouflage Mandibular setback with maxillary advancement corrects the concave profile. 23 / 50 Category: Orthodontics 23) An 11-year-old patient needs expansion. What is the recommended activation rate? Rapid 0.5 mm weekly Slow 0.25 mm daily Slow 0.25 mm weekly Rapid 0.5 mm daily Rapid expansion at 0.5 mm daily is commonly recommended for young patients. 24 / 50 Category: Orthodontics 24) A patient complains about their denture. What is the most likely cause based on the picture? Midline shift Broken denture Poor fit Increased vertical dimension Midline shift is a common issue with poorly fitting dentures. 25 / 50 Category: Orthodontics 25) After space analysis, a patient has 26 mm of space but requires 25 mm. What does this indicate? Normal Crowding Spacing No treatment needed The space is sufficient, indicating a normal situation. 26 / 50 Category: Orthodontics 26) A patient complains of diffuse redness and pain in the left buccal mucosa 6 weeks after orthodontic installation. What is the most likely cause? Infection Extended wire Allergy to NiTi wire Wire trauma Allergy to NiTi wire can cause mucosal irritation and redness. 27 / 50 Category: Orthodontics 27) What type of primary occlusion ends with Class III? Distal step Open bite Mesial step Flush Mesial step occlusion is associated with Class III malocclusion. 28 / 50 Category: Orthodontics 28) 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? Orthognathic surgery Mandibular expansion Camouflage treatment Maxillary expansion Orthognathic surgery is the best option for significant skeletal discrepancies. 29 / 50 Category: Orthodontics 29) What is the definition of pseudo Class III malocclusion? A condition where the teeth are perfectly aligned A condition where the mandible is retruded A condition where the maxilla is underdeveloped A condition where the mandible shifts forward, mimicking Class III malocclusion 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. 30 / 50 Category: Orthodontics 30) A patient has a unilateral crossbite due to a functional shift of the mandible. What is the best treatment? Treatment of unilateral crossbite on the non-affected side Bilateral maxillary expansion No treatment Treatment of unilateral crossbite on the affected side Bilateral maxillary expansion is the most effective treatment for functional shifts. 31 / 50 Category: Orthodontics 31) A patient with Class II malocclusion has a parent concerned about mandibular deficiency. What measurement is most useful for diagnosis? SNA SN-OP SN-MP SNB SNB is used to assess the position of the mandible. 32 / 50 Category: Orthodontics 32) A patient has a long wire causing irritation, with an appointment in 2 weeks. What should be done? Remove the wire Bond the buccal tube Wait for the appointment Cut the wire Cutting the wire is the best immediate solution to relieve irritation. 33 / 50 Category: Orthodontics 33) 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. 34 / 50 Category: Orthodontics 34) What is the most common malocclusion? Class I crowding Class I aligned teeth Class II Class III Class I crowding is the most common type of malocclusion. 35 / 50 Category: Orthodontics 35) A patient has a unilateral crossbite caused by unilateral maxillary constriction. What is the best treatment? Unilateral expansion Surgery No treatment Bilateral expansion Unilateral expansion is the treatment for unilateral maxillary constriction. 36 / 50 Category: Orthodontics 36) A 22-year-old patient has a reverse anterior crossbite of 9 mm. What is the best treatment? No treatment Extraction Orthognathic surgery Orthodontic camouflage Orthognathic surgery is needed for severe reverse crossbite. 37 / 50 Category: Orthodontics 37) What causes mesial resorption of bone and distal deposits? Physiologic mesial migration of a tooth Trauma Orthodontic extrusion Winding of the diastema Physiologic mesial migration of a tooth can cause these bone changes. 38 / 50 Category: Orthodontics 38) A 14-year-old patient has crowding in the upper and lower arches and a missing upper canine. What is the best treatment option? Nonextraction Expansion Extraction Distalization Expansion is often the preferred treatment for crowding and missing teeth in young patients. 39 / 50 Category: Orthodontics 39) A 25-year-old patient has a retained primary canine and an impacted permanent canine with poor prognosis. What is the best management? No treatment Extraction and space closure Crown for the primary canine Extraction of both canines and implant If the primary canine has a good prognosis, it is best to leave it in place. 40 / 50 Category: Orthodontics 40) A patient has increased lower facial height, abnormal ramus growth, open bite, and proclined incisors. What is the most likely cause? Tongue thrust habit Coronal syndrome Mouth breathing Genetic factors Mouth breathing is a common cause of increased lower facial height and open bite. 41 / 50 Category: Orthodontics 41) A patient has a minor tongue injury due to a palatal crib. What is the best course of action? Reassure the parent Remove the palatal crib No treatment needed Reassure the child Reassuring the child is the first step for minor injuries. 42 / 50 Category: Orthodontics 42) A patient with fixed orthodontic appliances complains of pain posterior to tooth #17. What is the most likely cause? Normal adjustment pain Broken bracket Extended wire Infection An extended wire is a common cause of irritation and pain in orthodontic patients. 43 / 50 Category: Orthodontics 43) A 14-year-old patient has unerupted maxillary canines and anterior crowding. What is the best treatment? Distalization Expansion Extraction Nonextraction Expansion is often the best option for creating space in young patients. 44 / 50 Category: Orthodontics 44) A patient with Class II malocclusion has excessive vertical growth and incompetent lips. What is the most likely cause? Tooth-jaw discrepancy Genetic factors Soft tissue imbalance Skeletal discrepancy Skeletal discrepancy is often the cause of excessive vertical growth and incompetent lips. 45 / 50 Category: Orthodontics 45) A patient has a Class III molar relationship. What is the best camouflage extraction? Extract upper first premolar and lower first premolar Extract lower first premolar Extract upper second premolar and lower first premolar No extraction Extracting upper second premolar and lower first premolar is a common camouflage strategy for Class III malocclusion. 46 / 50 Category: Orthodontics 46) A patient complains of a deep bite and excessive vertical growth of the maxilla. What is the most likely diagnosis? Normal growth Vertical excess of the maxilla Skeletal Class II Skeletal Class III Skeletal Class II is characterized by excessive vertical growth of the maxilla. 47 / 50 Category: Orthodontics 47) Where is the center of rotation of a single tooth? Middle of the tooth and apical Apex of the tooth Middle of the tooth and crown Furcation The center of rotation is typically located between the middle of the tooth and the apical region. 48 / 50 Category: Orthodontics 48) A patient has a fixed orthodontic appliance with a diastema and low frenum. What is the next step? Continue orthodontic treatment Wait for natural closure Remove the appliance Frenectomy Frenectomy is often necessary to address a low frenum causing diastema. 49 / 50 Category: Orthodontics 49) A 14-year-old patient has a Class I malocclusion with a single tooth crossbite. What is the best treatment? Removable appliance with finger spring Fixed orthodontic appliance Extraction No treatment A removable appliance with a finger spring is effective for correcting single tooth crossbite. 50 / 50 Category: Orthodontics 50) A patient has an overjet, inverted lower lip, and deep labiomental fold. Cephalometric analysis shows normal SNA and decreased SNB. What is the diagnosis? Normal occlusion Microdontia Lower deficiency and upper prognathism Lower deficiency The patient has lower deficiency and upper prognathism. Your score is The average score is 65% 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
