Orthodontics R11 Orthodontics SDLE MCQ 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% 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394 Orthodontics R11 Orthodontics SDLE MCQ 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 / 94 Category: Orthodontics 1) A patient has a protrusive mandible, maxillary deficiency, crowding, and impacted canine. What is treated first? Maxillary deficiency Impacted canine Crowding Protrusive mandible Maxillary expansion addresses constriction and crowding. 2 / 94 Category: Orthodontics 2) A patient has white spots after orthodontics. What should they use? Mouthwash Fluoride gel Fluoride varnish Toothpaste Fluoride varnish remineralizes white spot lesions. 3 / 94 Category: Orthodontics 3) A patient with multiple root resorptions after rapid orthodontic treatment. What is the cause? Excessive force Genetic factors Infection Trauma Rapid movement with high force causes root resorption. 4 / 94 Category: Orthodontics 4) A patient with gummy smile and long maxilla. What is the treatment? Surgery No treatment Botox Orthodontics Surgical maxillary impaction corrects excessive gingival display. 5 / 94 Category: Orthodontics 5) A patient with open bite requests faster orthodontic treatment. What adjunctive procedure is recommended? Occlusal adjustment Alveolar decortication CTG Gingivectomy Decortication accelerates tooth movement via regional acceleratory phenomenon. 6 / 94 Category: Orthodontics 6) A patient undergoing 36-month orthodontic treatment. Which teeth are most prone to root resorption? Lower central incisor Lower canine Upper central incisor Upper canine Upper central incisors are most susceptible to root resorption. 7 / 94 Category: Orthodontics 7) Which orthodontic movement causes more resorption in upper teeth? Intrusion Tipping Extrusion Rotation Intrusion of upper teeth often leads to greater root resorption. 8 / 94 Category: Orthodontics 8) What type of bite plane is used in Class II division 2 malocclusion? Anterior bite plate Flat plane Inclined plane Posterior bite plate Anterior bite plates help correct deep bites in Class II cases. 9 / 94 Category: Orthodontics 9) What is the treatment for Class 3 camouflage? Extraction lower 6 and upper 5 Extraction lower 4 and upper 5 No extraction needed Extraction upper 4 only Extraction of lower first premolars and upper second premolars is the standard approach for Class 3 camouflage. 10 / 94 Category: Orthodontics 10) White spots appear 2 weeks after debonding. What is the treatment? Fluoride varnish No treatment Fillings Fluoride gel Fluoride varnish reverses early demineralization. 11 / 94 Category: Orthodontics 11) What is the term for mesial resorption and distal bone deposition during tooth movement? Physiological tooth movement Pathological resorption Root remodeling Anchorage loss Physiological tooth movement involves bone remodeling. 12 / 94 Category: Orthodontics 12) A 21-year-old with embedded anterior deep bite. What is the treatment? Intrude upper anterior Camouflage Orthognathic surgery Extrude posterior Extruding posterior teeth helps correct deep bites. 13 / 94 Category: Orthodontics 13) What is the most common feature of Class I malocclusion? Crowding Spacing Open bite Deep bite Crowding is the hallmark of Class I malocclusion. 14 / 94 Category: Orthodontics 14) A 30-year-old with retained #53 and impacted #13 (poor prognosis). What is the treatment? Extract #13 and implant Extract and suture Crown on #53 Leave #53 Extraction and implant replace non-viable canines. 15 / 94 Category: Orthodontics 15) How often should rapid expansion be activated? Once a week Every other day Twice a day Once a day Rapid expansion requires daily activation for effective results. 16 / 94 Category: Orthodontics 16) A 14-year-old has space for right canine but not left. What is the treatment? No treatment Orthodontic alignment Canine extraction Fixed prosthesis Fixed prostheses replace missing or non-erupted canines. 17 / 94 Category: Orthodontics 17) A pediatric patient with unerupted permanent canine (poor prognosis) and intact primary canine. What is the treatment? Leave primary canine Extract and close space Extract primary canine Crown on primary canine Primary canines are retained if permanent successors are non-viable. 18 / 94 Category: Orthodontics 18) A 13-year-old with anterior open bite, posterior crossbite, and thumb sucking. What is the treatment? Quad helix Hawley retainer Tongue crib Hass appliance Hass appliances expand the maxilla and correct crossbites. 19 / 94 Category: Orthodontics 19) What causes unilateral crossbite during lateral tooth eruption? Abnormal chewing Abnormal swelling Tongue/cheek pressure Functional mandibular shift Functional shifts during eruption lead to unilateral crossbites. 20 / 94 Category: Orthodontics 20) What is the effect of a large filling on orthodontic treatment? Delays treatment Causes tooth fracture Reduces tooth movement Increases mobility Large restorations weaken tooth structure, risking fracture. 21 / 94 Category: Orthodontics 21) What is the ANB angle trend in Class II malocclusion? Increased Variable Normal Decreased Class II cases typically have higher ANB angles. 22 / 94 Category: Orthodontics 22) What appliance retains crossbite correction after treatment? Essix retainer Fixed retainer Hawley retainer Quad helix Quad helix maintains expansion and alignment. 23 / 94 Category: Orthodontics 23) A patient complains of generalized pain 4 days after starting orthodontic treatment. What should be done? Adjust the appliance Refer to prosthodontist Reassure the patient Prescribe analgesics Initial orthodontic pain is normal and subsides within a week. 24 / 94 Category: Orthodontics 24) An adult with retained #53 (good alignment, no resorption) and impacted #13 (poor prognosis). What is the treatment? Crown on #53 Leave #53 Extract and implant Orthodontic alignment Retained primary canines with good prognosis can be preserved. 25 / 94 Category: Orthodontics 25) What does a periodontist perform to expedite orthodontic treatment? Alveolar decortication Gingivectomy Bone grafting Frenectomy Decortication stimulates bone remodeling for faster movement. 26 / 94 Category: Orthodontics 26) Pseudo-Class III malocclusion is characterized by: Skeletal Class 1 Molar Class 1 None Functional shift It is a dental malocclusion with normal skeletal relationships. 27 / 94 Category: Orthodontics 27) What appliance is used for a retruded mandible? Chin cup Rapid palatal expander Functional appliances Face mask Functional appliances advance the mandible. 28 / 94 Category: Orthodontics 28) A 2-year-old with thumb sucking. How is this managed? Palatal crib Orthodontic pacifier Wait until age 8 Behavioral therapy Thumb sucking is normal in toddlers and usually resolves by age 4. 29 / 94 Category: Orthodontics 29) Why is a quad helix appliance beneficial? Easy to clean Faster treatment No patient activation needed Less discomfort Quad helix appliances are passive and require no patient cooperation. 30 / 94 Category: Orthodontics 30) A healthy orthodontic patient complains of pain. What should be given? NSAID Paracetamol Antibiotics Local anesthetic Paracetamol is safer for mild orthodontic pain. 31 / 94 Category: Orthodontics 31) What problem is a chin cup used to treat? Open bite Class III malocclusion Class II malocclusion Deep bite Chin cups restrain mandibular growth in Class III cases. 32 / 94 Category: Orthodontics 32) A patient with external root resorption on tooth 5. What is the cause? Trauma High orthodontic force Genetic factors Infection Excessive force during orthodontics causes root resorption. 33 / 94 Category: Orthodontics 33) Tooth 36 is missing, and 37 is mesially tilted. What is needed before implant placement? Bone grafting No preparation Extraction of 37 Orthodontic uprighting Uprighting tilted molars ensures proper implant positioning. 34 / 94 Category: Orthodontics 34) A patient reports pain during eating 3 days after starting orthodontics. What is the advice? Prescribe analgesics Reassure the patient Stop treatment Adjust the appliance Early orthodontic discomfort resolves within a week. 35 / 94 Category: Orthodontics 35) A patient has Class II molars bilaterally. What is the skeletal classification? Class II skeletal Class I skeletal None Class III skeletal Bilateral Class II molars indicate Class II skeletal malocclusion. 36 / 94 Category: Orthodontics 36) A patient with periodontal inflammation undergoes orthodontics. Where is the center of resistance? At the root apex More apical At the crown More coronal Inflamed periodontium shifts the center of resistance apically. 37 / 94 Category: Orthodontics 37) What method is used for space analysis in mixed dentition? Bolton analysis Carey’s analysis Moyer’s analysis Tanaka and Johnston Tanaka and Johnston predict space needs in mixed dentition. 38 / 94 Category: Orthodontics 38) Upper central incisors are normal, but lower centrals are deep behind the uppers, causing palatal problems. What is this called? Bite impingement Crossbite Open bite Deep bite Bite impingement occurs when lower incisors traumatize the palate. 39 / 94 Category: Orthodontics 39) A 25-year-old patient with protruded upper anterior teeth and good lower arch alignment. What is the treatment? Functional appliance Headgear Expansion Extraction upper first premolars Extraction of upper first premolars retracts protruded upper incisors. 40 / 94 Category: Orthodontics 40) Which crossbite should be corrected first? Posterior unilateral Posterior bilateral None Anterior Posterior unilateral crossbites affect function and should be prioritized. 41 / 94 Category: Orthodontics 41) A Class III malocclusion due to maxillary constriction. What appliance is used? Quad helix Banded expander W-arch Bonded expander Bonded expanders are effective for maxillary constriction. 42 / 94 Category: Orthodontics 42) A 6-year-old with unilateral posterior crossbite and midline shift. What is the treatment? Slow expansion (2mm per week) Rapid expansion Functional appliance No treatment Slow expansion corrects crossbite in mixed dentition. 43 / 94 Category: Orthodontics 43) What is the most prevalent molar classification in the general population? Class I Class II division 1 Class III Class II division 2 Class I malocclusion is the most common. 44 / 94 Category: Orthodontics 44) What is the treatment for a gummy smile with 9mm incisor exposure at rest? Surgery Orthodontics Lip repositioning Botox Surgery is definitive for severe gummy smiles. 45 / 94 Category: Orthodontics 45) A patient in early mixed dentition with unilateral crossbite. What is the treatment? Delay treatment Skeletal expansion Dental expansion Headgear Skeletal expansion corrects unilateral crossbites early. 46 / 94 Category: Orthodontics 46) What is the treatment for an adult with narrow maxilla and incisor crowding? Distalization of molars Expansion without extraction Extraction of premolars Orthognathic surgery Extraction of premolars creates space for alignment in crowded cases. 47 / 94 Category: Orthodontics 47) What is a tissue-borne maxillary expansion device? Quad helix W-arch Haas appliance Hyrax appliance Haas appliances are tissue-borne and used for maxillary expansion. 48 / 94 Category: Orthodontics 48) A 13-year-old with posterior crossbite. What is the treatment? Hass expansion Rapid palatal expansion Slow expansion No treatment Hass appliances are used for posterior crossbites. 49 / 94 Category: Orthodontics 49) A patient with long face, narrow maxilla, posterior overeruption, and anterior open bite. What is the likely cause? Thumb sucking Genetic factors Mouth breathing Tongue thrusting Mouth breathing leads to vertical growth patterns and open bites. 50 / 94 Category: Orthodontics 50) A 20-year-old patient with Class 2 malocclusion, 6mm overjet, and normal mandibular alignment. What is the treatment? Expansion Extraction upper 5 Extraction upper 4 Growth modification Extraction of upper first premolars is effective for reducing overjet. 51 / 94 Category: Orthodontics 51) An 8-year-old with overgrown mandible and constricted maxilla. What is treated first? Chin cup for mandible Functional appliance No treatment Maxillary expansion Maxillary expansion addresses constriction before mandibular growth modification. 52 / 94 Category: Orthodontics 52) A child with thumb sucking habit. What is the appropriate action? Refer to a psychologist Give an appliance Educate parents Ignore the habit Parental education is the first step for young children. 53 / 94 Category: Orthodontics 53) An orthodontic wire irritates the patient. What is the solution? Cut the wire Apply wax Adjust the wire Remove the appliance Wax provides temporary relief from wire irritation. 54 / 94 Category: Orthodontics 54) A cephalometric analysis shows SNA 80°, SNB 70°, and ANB 11°. What is the diagnosis? Maxillary retrognathism Mandibular protrusion Mandibular retrognathism Maxillary protrusion Low SNB indicates mandibular retrognathism. 55 / 94 Category: Orthodontics 55) A patient has proclined upper incisors and retroclined lower incisors with overjet. What is the classification? Class IV Class III Class I Class II Proclined uppers and retroclined lowers are Class II features. 56 / 94 Category: Orthodontics 56) A patient has impinging upper and lower incisors fully visible when smiling. What is the orthodontic solution? Extrude lower posteriors Extrude upper anterior Extrude upper posteriors Intrude lower anteriors Extruding lower posteriors opens the bite and reduces impingement. 57 / 94 Category: Orthodontics 57) A patient with poor oral hygiene and white spots after debonding. What is the treatment? Antibiotics Fluoride gel Fluoride varnish SRP Fluoride varnish is effective for post-orthodontic white spots. 58 / 94 Category: Orthodontics 58) A patient with generalized recession after 4 months of orthodontic treatment. What is the cause? High force Poor oral hygiene Systemic disease Thin biotype Excessive force leads to gingival recession. 59 / 94 Category: Orthodontics 59) How far should the film be placed during cephalometric imaging? 10 cm 20 cm 5 cm 15 cm Standard distance ensures accurate cephalometric measurements. 60 / 94 Category: Orthodontics 60) A patient needs serial extraction for severe crowding. What is the next step? Monitor growth No treatment Extract as requested Refer to orthodontist Orthodontic consultation ensures proper serial extraction planning. 61 / 94 Category: Orthodontics 61) A patient with red, inflamed left cheek during orthodontic treatment. What is the probable cause? Trauma Stainless steel allergy Poor oral hygiene Infection Allergic reactions to stainless steel components can occur. 62 / 94 Category: Orthodontics 62) A patient with crowding proceeds with extraction. What is the next step? Extract all teeth at once No extraction Refer to periodontist Consult orthodontist Orthodontic consultation ensures proper treatment planning. 63 / 94 Category: Orthodontics 63) If 75g force is used for tipping upper centrals, what force is needed for intrusion? 75g 125g 25g 100g Intrusion requires lighter forces (25-50g) to avoid root resorption. 64 / 94 Category: Orthodontics 64) A patient complains of pain after starting orthodontics. What should be done? Adjust the appliance Prescribe painkillers Reassure the patient Refer to specialist Initial orthodontic pain is normal and temporary. 65 / 94 Category: Orthodontics 65) What defines pseudo-Class III malocclusion? Skeletal Class 1 Genetic predisposition Functional shift Molar Class 1 Pseudo-Class III is a dental malocclusion with a normal skeletal base. 66 / 94 Category: Orthodontics 66) A patient has a reverse overjet of 6mm. What is the treatment? Functional appliance Camouflage orthodontics Orthognathic surgery Headgear Severe skeletal discrepancies require orthognathic surgery. 67 / 94 Category: Orthodontics 67) What appliance is used for mandibular deficiency? Face mask Twin block Headgear Bionator Twin blocks are functional appliances for mandibular deficiency. 68 / 94 Category: Orthodontics 68) An osteoporotic patient wants orthodontic treatment. What force is recommended? Regular Fast Slow Avoid treatment Slow forces minimize bone damage in osteoporotic patients. 69 / 94 Category: Orthodontics 69) A patient with 1mm gingival recession on lower incisors undergoing orthodontics. Which movement increases recession? Labial movement Intrusion Lingual movement Extrusion Labial movement of lower incisors worsens recession. 70 / 94 Category: Orthodontics 70) What is the typical malocclusion classification in cleft lip patients? Class I Class III Class II division 2 Class II division 1 Cleft lip patients often exhibit Class III malocclusion due to maxillary deficiency. 71 / 94 Category: Orthodontics 71) Where is the center of rotation in multirooted teeth? At the root apex At the CEJ Above the bifurcation At the furcation The furcation is the pivot point for multirooted teeth. 72 / 94 Category: Orthodontics 72) A 13-year-old with crossbite and skeletal deficiency. What is the treatment? Slow expansion weekly Slow expansion daily Rapid expansion weekly Rapid expansion (0.5mm daily) Rapid expansion is used for skeletal deficiencies in adolescents. 73 / 94 Category: Orthodontics 73) What type of force is ideal for orthodontic tooth movement? Light continuous Variable Heavy intermittent No force Light continuous forces are most physiological. 74 / 94 Category: Orthodontics 74) A patient with Class II malocclusion and reduced lower face height. How is this managed? Cervical pull headgear Functional appliance Anterior bite plate Posterior bite plate Anterior bite plates open the bite and improve lower face height. 75 / 94 Category: Orthodontics 75) A patient with ceramic braces and coated wire develops anterior abfraction. What is the cause? Bruxism Using anterior teeth for grinding Poor oral hygiene Allergic reaction Ceramic braces increase brittleness, leading to abfraction under stress. 76 / 94 Category: Orthodontics 76) A patient has a diastema. What is the likely cause? Trauma Low frenum attachment Crowding Microdontia High frenal attachments cause midline diastemas. 77 / 94 Category: Orthodontics 77) A patient has a small ulceration distally after orthodontic treatment. What is the likely cause? Allergic reaction Infection Trauma Wire irritation Orthodontic wires often cause soft tissue irritation. 78 / 94 Category: Orthodontics 78) What is the treatment for Class 2 camouflage? Functional appliance Headgear Extraction upper 4 Extraction lower 4 Extraction of upper first premolars is common for Class 2 camouflage. 79 / 94 Category: Orthodontics 79) A pediatric patient with persistent thumb sucking. What is the treatment? Palatal crib appliance Face mask Hawley retainer Tongue crib Palatal cribs discourage thumb sucking. 80 / 94 Category: Orthodontics 80) A patient complains of an extended orthodontic wire. What should be done? Cut the wire Wait for next appointment Remove the appliance Bend the wire Trimming the wire prevents soft tissue irritation. 81 / 94 Category: Orthodontics 81) A patient has 26mm space available but 25mm required. What is the diagnosis? None Spacing Bolton discrepancy Crowding Excess space indicates spacing. 82 / 94 Category: Orthodontics 82) A patient with mobile teeth and root resorption after accelerated orthodontics. What is the cause? Infection Trauma Rapid forces Systemic disease Accelerated treatment with high forces risks root resorption. 83 / 94 Category: Orthodontics 83) What is the treatment for a single anterior crossbite? Functional appliance Fixed appliance Removable appliance (Z-spring) Surgery Z-springs correct anterior crossbites in removable appliances. 84 / 94 Category: Orthodontics 84) A patient has overjet, inverted lower lip, deep labiomental fold, and decreased SNB. What is the diagnosis? Microdontia Upper prognathism Lower deficiency None Low SNB suggests mandibular deficiency. 85 / 94 Category: Orthodontics 85) What occurs during mesial tooth movement? No change Distal resorption, mesial deposition Uniform resorption Mesial resorption, distal deposition Tooth movement involves bone remodeling on pressure/tension sides. 86 / 94 Category: Orthodontics 86) A patient with thin scalloped bone undergoes labial tooth movement. What is the risk? Recession Root resorption Mobility Ankylosis Thin biotypes are prone to gingival recession. 87 / 94 Category: Orthodontics 87) A patient has an ANB angle of -5°. What is the classification? None Class II Class I Class III malocclusion Negative ANB angles indicate Class III skeletal relationships. 88 / 94 Category: Orthodontics 88) What is a tongue retainer device used for? TMJ disorders Sleep apnea Speech therapy Bruxism Tongue retainers prevent airway obstruction in sleep apnea. 89 / 94 Category: Orthodontics 89) A patient has Class I molar on the left and Class II on the right. What is the molar classification? Class I subdivision left Class II subdivision left Class I subdivision right Class II subdivision right Asymmetric molar relationships are classified as subdivisions. 90 / 94 Category: Orthodontics 90) A 7-year-old with excessive mandibular growth and family history of prognathism. What is the management? Orthognathic surgery Fixed orthodontics Delay treatment Start treatment Early intervention is avoided due to unpredictable growth. 91 / 94 Category: Orthodontics 91) A patient has subgingival orthodontic bands. What is the likely effect? Root resorption Tooth mobility Gingival growth Gingival recession Subgingival bands can cause gingival recession. 92 / 94 Category: Orthodontics 92) What is the camouflage treatment for Class II without crowding? Extraction lower 4 Extraction upper 4 Functional appliance Headgear Extraction of upper first premolars is preferred for Class II without crowding. 93 / 94 Category: Orthodontics 93) A decreased ANB angle indicates which class? Class I None Class III Class II Lower ANB values correlate with Class III malocclusion. 94 / 94 Category: Orthodontics 94) What does SNB measure in cephalometrics? Maxillary position Mandibular position Dental inclination Vertical height SNB assesses the anteroposterior position of the mandible. Your score is The average score is 54% 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
