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