Orthodontics Orthodontics SDLE MCQ | Part 2 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 2 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) An adult patient uses a tongue-retaining appliance. What is its primary purpose? Correct tongue thrust Reduce snoring Improve speech Treat sleep apnea Tongue-retaining appliances are primarily used for sleep apnea. 2 / 50 Category: Orthodontics 2) An orthodontic patient has a bulging band causing ulceration. What is the best management? Cut the band Remove the appliance Apply wax Wait for the next appointment Applying wax is the best immediate solution to relieve irritation. 3 / 50 Category: Orthodontics 3) A patient has ANB = 6, SNA = 80, SNB = 74, and upper incisors to SN = 110. What is the classification? Class I Class II division 2 Class II division 1 Class III These measurements indicate Class II division 1 malocclusion. 4 / 50 Category: Orthodontics 4) A patient has a retained primary canine with good prognosis and an impacted permanent canine with poor prognosis. What is the best treatment? Crown the primary canine Leave the primary canine Extract the primary canine and place an implant Extract the primary canine and close space If the primary canine has a good prognosis, it should be left in place. 5 / 50 Category: Orthodontics 5) What is assessed in a lateral cephalometric analysis? Dental alignment Anteroposterior skeletal relationship Transverse relationship Vertical relationship Lateral cephalometric analysis primarily assesses the anteroposterior relationship. 6 / 50 Category: Orthodontics 6) Which type of occlusion is a contraindication for an anterior bite plane? Deep bite Crossbite Normal occlusion Open bite Anterior bite planes are contraindicated in patients with open bites. 7 / 50 Category: Orthodontics 7) A patient with Class III malocclusion needs extraction. What is the best extraction pattern? Extract upper first premolar and lower first premolar Extract lower first premolar No extraction Extract upper second premolar and lower first premolar Extracting upper second premolar and lower first premolar is common for Class III camouflage. 8 / 50 Category: Orthodontics 8) What is the most important factor for using a functional appliance? Patient compliance Treatment duration Dental development Skeletal age Skeletal age is the most critical factor for functional appliance success. 9 / 50 Category: Orthodontics 9) A 19-year-old patient has maxillary constriction. What is the best treatment? Surgical-assisted maxillary expansion Rapid expansion Orthodontic treatment LeFort osteotomy Surgical-assisted maxillary expansion (SARPE) is the best treatment for maxillary constriction in adults. 10 / 50 Category: Orthodontics 10) A growing patient has Class III malocclusion. What is the best appliance? Twin block Facemask Quad helix Headgear A facemask is effective for correcting Class III malocclusion in growing patients. 11 / 50 Category: Orthodontics 11) A patient has a protruded archwire causing ulceration. What is the best management? Prescribe pain medication Reassure the patient Clip the wire Apply wax Clipping the wire is the most effective way to relieve irritation. 12 / 50 Category: Orthodontics 12) What is the most common cause of impacted canines? Genetic factors Thick tissue Bone around the crown Trauma Bone around the crown is the most common cause of impaction. 13 / 50 Category: Orthodontics 13) What is the best way to level the curve of Spee in a growing patient? TADs Anterior bite plane No treatment Posterior bite plane An anterior bite plane is effective for leveling the curve of Spee. 14 / 50 Category: Orthodontics 14) What is the characteristic of a dolichocephalic skull? Long and narrow Asymmetric Normal proportions Short and wide A dolichocephalic skull is long and narrow. 15 / 50 Category: Orthodontics 15) What is the most common type of malocclusion? Class I aligned teeth Class III Class II Class I crowding Class I crowding is the most common type of malocclusion. 16 / 50 Category: Orthodontics 16) A 12-year-old patient has a 4 mm diastema, unerupted mesiodens, and low frenal attachment. What is the best treatment? Wait for canine eruption Frenectomy only No treatment Extract mesiodens and use fixed appliances Extracting the mesiodens and using fixed appliances is the best approach. 17 / 50 Category: Orthodontics 17) At what age should the first orthodontic screening occur? 7 years 12 years 15 years 10 years The American Association of Orthodontists recommends screening by age 7. 18 / 50 Category: Orthodontics 18) A 14-year-old patient has a diastema and low frenal attachment. What should be examined before starting orthodontic treatment? Study models Blanching of the incisive papilla Cephalometric analysis Panoramic X-ray Blanching of the incisive papilla indicates frenal attachment interference. 19 / 50 Category: Orthodontics 19) What is the indication for growth modification in a patient with Class III skeletal malocclusion? Protraction of the mandible No treatment Protraction of the maxilla Surgery Protraction of the maxilla is the primary goal in Class III growth modification. 20 / 50 Category: Orthodontics 20) An 8-year-old patient has a retrognathic mandible. What is the best treatment? Surgery No treatment Headgear Functional appliance Functional appliances are effective for growing patients with retrognathic mandibles. 21 / 50 Category: Orthodontics 21) A pediatric patient has an anterior open bite, posterior crossbite, and a thumb-sucking habit. What is the best appliance? Facemask Quad helix Hawley retainer Palatal crib A palatal crib is effective for addressing thumb-sucking and associated dental issues. 22 / 50 Category: Orthodontics 22) A patient is missing tooth #46, with tilted #45 and supraerupted #26. What is the best management? Orthodontic treatment to close space Extraction Orthodontic treatment to open space No treatment Opening space is necessary to address the tilted and supraerupted teeth. 23 / 50 Category: Orthodontics 23) Which plane is used in Wits appraisal? Mandibular plane Functional occlusal plane Palatal plane Frankfort plane The functional occlusal plane is used in Wits appraisal. 24 / 50 Category: Orthodontics 24) When should frenectomy be performed after space closure? After 1 year Immediately After 6 months After 2 years Frenectomy is typically performed immediately after space closure. 25 / 50 Category: Orthodontics 25) A patient has Class II on the right and Class I on the left. What is the diagnosis? Class II subdivision left Class I Class III Class II subdivision right Class II subdivision right is the correct diagnosis. 26 / 50 Category: Orthodontics 26) Which type of occlusion is used in Wits appraisal? Frankfort plane Mandibular plane Palatal plane Functional occlusion Functional occlusion is used in Wits appraisal. 27 / 50 Category: Orthodontics 27) What is the primary characteristic of vertical maxillary excess? Crossbite Excessive gingival display Open bite Deep bite Excessive gingival display is a hallmark of vertical maxillary excess. 28 / 50 Category: Orthodontics 28) What is the main difference between orthodontic treatment in adults and children? No difference Adults need larger brackets Children require more frequent visits Slower tooth movement in adults Tooth movement is slower in adults due to reduced bone remodeling. 29 / 50 Category: Orthodontics 29) A 16-year-old patient has Class II malocclusion, excessive lower facial height, incompetent lips, and excessive gingival display. What is the most likely diagnosis? Genetic factors Crouzon syndrome Mouth breathing Normal growth Mouth breathing is often associated with these characteristics. 30 / 50 Category: Orthodontics 30) A patient has a unilateral crossbite. What is the best treatment? Unilateral expansion Bilateral expansion No treatment Surgery Unilateral expansion is the treatment for unilateral crossbite. 31 / 50 Category: Orthodontics 31) What is the main advantage of the quad helix appliance? Does not depend on patient compliance Rapid expansion Easy to fabricate Skeletal effect The quad helix does not rely on patient compliance, making it highly effective. 32 / 50 Category: Orthodontics 32) A 13-year-old patient has mouth breathing. What is the best treatment? Extraction Headgear Distalization Expansion Expansion is often needed to address mouth breathing and associated dental issues. 33 / 50 Category: Orthodontics 33) A 15-year-old patient has a diastema with no mesiodens. What is the most likely cause? Open bite Normal growth Low frenal attachment Genetic factors Low frenal attachment is a common cause of diastema. 34 / 50 Category: Orthodontics 34) A 12-year-old patient has unilateral crossbite and reduced facial height. What is the best treatment? No treatment Slow expansion Surgery Rapid expansion Rapid expansion is effective for correcting unilateral crossbite. 35 / 50 Category: Orthodontics 35) A pediatric patient has a thumb-sucking habit. What is the best appliance to use? Palatal crib Quad helix Hass appliance W arch A palatal crib is effective for breaking thumb-sucking habits. 36 / 50 Category: Orthodontics 36) A patient with severe periodontitis needs orthodontic treatment. Where should the force be applied? At the center of the tooth No force should be applied More coronally More apically Forces should be applied more apically to avoid further damage to compromised teeth. 37 / 50 Category: Orthodontics 37) What is the function of the Frankel III appliance? Intrude incisors Expand maxilla Retract mandible Enhance maxillary position The Frankel III appliance enhances maxillary position. 38 / 50 Category: Orthodontics 38) If 75 g of force is used for tipping a central incisor, what force is used for intrusion? 75 g 100 g 125 g 25 g Intrusion requires lighter forces, typically around 25 g. 39 / 50 Category: Orthodontics 39) A 19-year-old patient has maxillary constriction. What is the best treatment? Rapid expansion No treatment Orthodontic camouflage SARPE Surgically assisted rapid palatal expansion (SARPE) is the best treatment for maxillary constriction in adults. 40 / 50 Category: Orthodontics 40) Which teeth are most affected by bone resorption during orthodontic treatment? Lower incisors Upper incisors Canines Molars Upper incisors are most susceptible to bone resorption during orthodontic treatment. 41 / 50 Category: Orthodontics 41) A patient has cephalometric findings showing decreased SNB and increased incisal angle. What is the diagnosis? Class II division 2 Class I Class III Class II division 1 Decreased SNB and increased incisal angle indicate Class II division 2. 42 / 50 Category: Orthodontics 42) A patient with fixed appliances has severe laceration and ulceration due to an extended wire. What is the best management? Apply gauze Apply wax Reassure the patient Clip the wire Clipping the wire is the most effective way to relieve irritation. 43 / 50 Category: Orthodontics 43) A patient has a deep bite with 100% overbite. What is the best management? Lower anterior intrusion Upper posterior extrusion Upper anterior intrusion Lower posterior extrusion Lower anterior intrusion is the most effective way to correct deep bite. 44 / 50 Category: Orthodontics 44) What is the best appliance to retain crossbite correction? Essex retainer Hawley retainer Quad helix No retention needed A Hawley retainer is commonly used to retain crossbite correction. 45 / 50 Category: Orthodontics 45) A 4-year-old patient has malaligned teeth and an unerupted upper canine. What is the best treatment? Extraction Expansion Nonextraction Distalization Expansion is often the best option for creating space in young patients. 46 / 50 Category: Orthodontics 46) What is the primary characteristic of maxillary hypoplasia? Underdeveloped maxilla Crossbite Overdeveloped mandible Open bite Maxillary hypoplasia is characterized by an underdeveloped maxilla. 47 / 50 Category: Orthodontics 47) A patient with Class II malocclusion and a good facial profile needs correction of deep bite and overjet. What is the best treatment? Orthognathic surgery Extract upper first premolars Functional appliance No treatment Extracting upper first premolars is a common treatment for deep bite and overjet. 48 / 50 Category: Orthodontics 48) What diagnostic tool is most relevant for assessing arch size discrepancy? Panoramic X-ray Dental history Photographs Study casts Study casts allow for detailed analysis of arch size and tooth structure. 49 / 50 Category: Orthodontics 49) A patient has multiple ulcers due to orthodontic wires. What is the best management? Remove the appliance Prescribe antibiotics Cut the wire Apply wax Applying wax is the best immediate solution to relieve irritation. 50 / 50 Category: Orthodontics 50) A 9-year-old patient has crowding, impacted canines, maxillary deficiency, and mandibular prognathism. What is the most concerning issue? Mandibular prognathism Canine impaction Maxillary deficiency Crowding Maxillary deficiency is the most critical issue to address early. 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